diff --git a/.github/workflows/build_cmake.yml b/.github/workflows/build_cmake.yml
index bcbf72ef..ced14df7 100644
--- a/.github/workflows/build_cmake.yml
+++ b/.github/workflows/build_cmake.yml
@@ -95,6 +95,34 @@ jobs:
           name: macos-x86_64
           path: |
             ${{github.workspace}}/build/*
+  msvc-x86_64:
+    runs-on: windows-latest
+    defaults:
+      run:
+        working-directory: ./src
+    steps:
+      - uses: actions/checkout@v2
+      - name: Install prerequisites
+        run: choco install winflexbison3
+      - name: Configure
+        run: >-
+          cmake
+          -D DEBUG_CMAKE=1
+          -D CMAKE_SYSTEM_VERSION=11
+          -D CMAKE_C_FLAGS_RELWITHDEBINFO="/MT /GL /Zi /O2 /Ob1 /DNDEBUG"
+          -D CMAKE_CXX_FLAGS_RELWITHDEBINFO="/MT /GL /Zi /O2 /Ob1 /DNDEBUG"
+          -D CMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO="/DEBUG /INCREMENTAL:NO /LTCG /OPT:REF /OPT:ICF"
+          -D CMAKE_BUILD_TYPE=${{env.BUILD_TYPE}}
+          -D USE_EXTERNAL=1
+          -B ../build
+      - name: Build
+        run: cmake --build ../build --config ${{env.BUILD_TYPE}}
+      - name: Archive build artifacts
+        uses: actions/upload-artifact@v2
+        with:
+          name: msvc-x86_64
+          path: |
+            ${{github.workspace}}/build/*
   mingw:
     runs-on: windows-latest
     defaults:
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index eff0b5e1..466a619c 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -30,15 +30,15 @@ option(BUILD_DOC "Enable building documents" OFF)
 option(HAVE_LINUXGPIO "Enable Linux sysfs GPIO support" OFF)
 option(HAVE_LINUXSPI "Enable Linux SPI support" OFF)
 option(HAVE_PARPORT "Enable parallel port support" OFF)
-option(USE_EXTERNAL "Use local code from the 'external' folder" OFF)
+option(USE_EXTERNAL "Use external libraries from AVRDUDE GitHub repositories" OFF)
 option(USE_LIBUSBWIN32 "Prefer libusb-win32 over libusb" OFF)
 option(DEBUG_CMAKE "Enable debugging output for this CMake project" OFF)
 
 include(CheckIncludeFile)
-include(CheckFunctionExists)
 include(CheckSymbolExists)
-include(GNUInstallDirs)
+include(FetchContent)
 include(FindPackageMessage)
+include(GNUInstallDirs)
 
 set(CONFIG_DIR "${CMAKE_INSTALL_FULL_SYSCONFDIR}")
 set(AVRDUDE_FULL_VERSION ${CMAKE_PROJECT_VERSION})
@@ -125,24 +125,6 @@ else()
     endif()
 endif()
 
-# =====================================
-# Detect headers
-# =====================================
-
-check_include_file(stdint.h HAVE_STDINT_H)
-check_include_file(stdlib.h HAVE_STDLIB_H)
-check_include_file(inttypes.h HAVE_INTTYPES_H)
-check_include_file(netinet/in.h HAVE_NETINET_IN_H)
-
-# =====================================
-# Detect functions
-# =====================================
-
-check_function_exists(usleep HAVE_USLEEP)
-check_function_exists(getaddrinfo HAVE_GETADDRINFO)
-check_function_exists(gettimeofday HAVE_GETTIMEOFDAY)
-check_function_exists(strcasecmp HAVE_STRCASECMP)
-
 # =====================================
 # Detect installed libraries
 # =====================================
@@ -218,14 +200,14 @@ endif()
 # -------------------------------------
 # Find libhidapi
 
+find_library(HAVE_LIBHID NAMES hid)
+
 find_library(HAVE_LIBHIDAPI NAMES ${PREFERRED_LIBHIDAPI})
 if(HAVE_LIBHIDAPI)
     set(LIB_LIBHIDAPI ${HAVE_LIBHIDAPI})
     check_include_file(hidapi/hidapi.h HAVE_HIDAPI_HIDAPI_H)
 endif()
 
-find_library(HAVE_LIBHID NAMES hid)
-
 # -------------------------------------
 # Find libftdi
 
@@ -251,6 +233,60 @@ if(HAVE_LIBREADLINE)
     set(LIB_LIBREADLINE ${HAVE_LIBREADLINE})
 endif()
 
+# =====================================
+# Use external libraries if requested
+# =====================================
+
+if(USE_EXTERNAL)
+    FetchContent_Declare(libelf
+        GIT_REPOSITORY https://github.com/avrdudes/libelf.git
+        GIT_TAG e5a39bf19bd6598c42e09172be5a78ceec2a065c
+        )
+
+    FetchContent_Declare(libusb
+        GIT_REPOSITORY https://github.com/avrdudes/libusb.git
+        GIT_TAG 632bc25d04eff563cc00de29435b9a7ed6f4654c
+        )
+
+    FetchContent_Declare(libhidapi
+        GIT_REPOSITORY https://github.com/avrdudes/libhidapi.git
+        GIT_TAG e3700e951f762ef92871ff4fc94586e4d1c042a6
+        )
+
+    FetchContent_Declare(libftdi
+        GIT_REPOSITORY https://github.com/avrdudes/libftdi.git
+        GIT_TAG f3a54da710002a7d25a32a69e667a69ef84cc120
+        )
+
+    message(STATUS "Fetching external libraries, please wait...")
+    FetchContent_MakeAvailable(
+        libelf
+        libusb
+        libhidapi
+        libftdi
+        )
+
+    message(STATUS "Using external library 'libelf'")
+    set(LIB_LIBELF libelf)
+    set(HAVE_LIBELF 1)
+    set(HAVE_LIBELF_H 1)
+
+    message(STATUS "Using external library 'libusb'")
+    set(LIB_LIBUSB libusb)
+    set(HAVE_LIBUSB 1)
+    set(HAVE_LUSB0_USB_H 1)
+
+    message(STATUS "Using external library 'libhidapi'")
+    set(LIB_LIBHIDAPI libhidapi)
+    set(HAVE_LIBHIDAPI 1)
+    set(HAVE_HIDAPI_HIDAPI_H 1)
+
+    message(STATUS "Using external library 'libftdi'")
+    set(LIB_LIBFTDI libftdi)
+    set(HAVE_LIBFTDI 1)
+    set(HAVE_LIBFTDI_TYPE_232H 1)
+endif()
+
 # =====================================
 # Setup target specific options
 # =====================================
@@ -258,10 +294,8 @@ endif()
 add_compile_definitions(CONFIG_DIR=\"${CONFIG_DIR}\")
 
 if(WIN32)
-    set(HAVE_LIBWS2_32 1)
     set(EXTRA_WINDOWS_SOURCES "${PROJECT_BINARY_DIR}/windows.rc")
     set(EXTRA_WINDOWS_LIBRARIES setupapi ws2_32)
-    add_compile_definitions(WIN32NATIVE=1)
 endif()
 
 if(NOT WIN32)
@@ -269,6 +303,28 @@ if(NOT WIN32)
     #add_compile_options(-Wall -Wextra -pedantic)
 endif()
 
+if(MSVC)
+    add_compile_definitions(_CRT_SECURE_NO_WARNINGS=1)
+    add_compile_definitions(_CRT_NONSTDC_NO_WARNINGS=1)
+    add_compile_definitions(_WINSOCK_DEPRECATED_NO_WARNINGS=1)
+    add_compile_options(/W3)
+    add_compile_options(/wd4018) # warning C4018: signed/unsigned mismatch
+    add_compile_options(/wd4244) # warning C4244: conversion from '...' to '...', possible loss of data
+    add_compile_options(/wd4267) # warning C4267: conversion from '...' to '...', possible loss of data
+    add_compile_options(/wd5105) # warning C5105: macro expansion producing 'xxx' has undefined behavior
+    add_compile_options(/wd6255) # warning C6255: _alloca indicates failure by raising a stack overflow exception. Consider using _malloca instead
+
+    set(EXTRA_WINDOWS_SOURCES ${EXTRA_WINDOWS_SOURCES}
+        "${PROJECT_SOURCE_DIR}/msvc/getopt.c"
+        "${PROJECT_SOURCE_DIR}/msvc/gettimeofday.c"
+        "${PROJECT_SOURCE_DIR}/msvc/usleep.cpp"
+        )
+    set(EXTRA_WINDOWS_INCLUDES ${EXTRA_WINDOWS_INCLUDES}
+        "${PROJECT_SOURCE_DIR}/msvc"
+        "${PROJECT_SOURCE_DIR}/msvc/generated"
+        )
+endif()
+
 # =====================================
 # Setup default port names
 # =====================================
@@ -308,11 +364,11 @@ if (DEBUG_CMAKE)
     message(STATUS "HAVE_LIBUSB: ${HAVE_LIBUSB}")
     message(STATUS "HAVE_LIBUSB_1_0: ${HAVE_LIBUSB_1_0}")
     message(STATUS "HAVE_LIBUSB_WIN32: ${HAVE_LIBUSB_WIN32}")
+    message(STATUS "HAVE_LIBHID: ${HAVE_LIBHID}")
     message(STATUS "HAVE_LIBHIDAPI: ${HAVE_LIBHIDAPI}")
     message(STATUS "HAVE_LIBFTDI: ${HAVE_LIBFTDI}")
     message(STATUS "HAVE_LIBFTDI1: ${HAVE_LIBFTDI1}")
     message(STATUS "HAVE_LIBREADLINE: ${HAVE_LIBREADLINE}")
-    message(STATUS "HAVE_LIBWS2_32: ${HAVE_LIBWS2_32}")
     message(STATUS "HAVE_LIBELF_H: ${HAVE_LIBELF_H}")
     message(STATUS "HAVE_LIBELF_LIBELF_H: ${HAVE_LIBELF_LIBELF_H}")
     message(STATUS "HAVE_USB_H: ${HAVE_USB_H}")
@@ -472,7 +528,6 @@ add_library(libavrdude STATIC
     lists.c
     micronucleus.c
     micronucleus.h
-    my_ddk_hidsdi.h
     par.c
     par.h
     pgm.c
diff --git a/src/Makefile.am b/src/Makefile.am
index c104e295..dd7adb57 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -138,7 +138,6 @@ libavrdude_a_SOURCES = \
 	lists.c \
 	micronucleus.c \
 	micronucleus.h \
-	my_ddk_hidsdi.h \
 	par.c \
 	par.h \
 	pgm.c \
diff --git a/src/avrdude.h b/src/avrdude.h
index ba650081..9574c78a 100644
--- a/src/avrdude.h
+++ b/src/avrdude.h
@@ -16,13 +16,13 @@
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 
-/* $Id$ */
+ /* $Id$ */
 
 #ifndef avrdude_h
 #define avrdude_h
 
 #define SYSTEM_CONF_FILE "avrdude.conf"
-#if defined(WIN32NATIVE)
+#if defined(WIN32)
 #define USER_CONF_FILE "avrdude.rc"
 #else
 #define USER_CONF_FILE ".avrduderc"
@@ -44,27 +44,4 @@ int avrdude_message(const int msglvl, const char *format, ...);
 #define MSG_TRACE   (4) /* displayed with -vvvv, show trace communication */
 #define MSG_TRACE2  (5) /* displayed with -vvvvv */
 
-#if defined(WIN32NATIVE)
-
-#include "ac_cfg.h"
-#include <windows.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-#if !defined(HAVE_USLEEP)
-int usleep(unsigned int us);
-#endif
-
-#if !defined(HAVE_GETTIMEOFDAY)
-struct timezone;
-int gettimeofday(struct timeval *tv, struct timezone *tz);
-#endif /* HAVE_GETTIMEOFDAY */
-
-#ifdef __cplusplus
-}
-#endif
-#endif /* defined(WIN32NATIVE) */
-
 #endif
diff --git a/src/avrftdi.c b/src/avrftdi.c
index e7437ddc..e41d775e 100644
--- a/src/avrftdi.c
+++ b/src/avrftdi.c
@@ -356,6 +356,9 @@ static int avrftdi_transmit_bb(PROGRAMMER * pgm, unsigned char mode, const unsig
 	blocksize = MAX(1,(max_size-7)/((8*2*6)+(8*1*2)));
 	//avrdude_message(MSG_INFO, "blocksize %d \n",blocksize);
 
+	unsigned char* send_buffer = alloca((8 * 2 * 6) * blocksize + (8 * 1 * 2) * blocksize + 7);
+	unsigned char* recv_buffer = alloca(2 * 16 * blocksize);
+
 	while(remaining)
 	{
 
@@ -364,7 +367,6 @@ static int avrftdi_transmit_bb(PROGRAMMER * pgm, unsigned char mode, const unsig
 		// (8*2) outputs per data byte, 6 transmit bytes per output (SET_BITS_LOW/HIGH),
 		// (8*1) inputs per data byte,  2 transmit bytes per input  (GET_BITS_LOW/HIGH),
 		// 1x SEND_IMMEDIATE
-		unsigned char send_buffer[(8*2*6)*transfer_size+(8*1*2)*transfer_size+7];
 		int len = 0;
 		int i;
 		
@@ -384,7 +386,6 @@ static int avrftdi_transmit_bb(PROGRAMMER * pgm, unsigned char mode, const unsig
 
 		E(ftdi_write_data(pdata->ftdic, send_buffer, len) != len, pdata->ftdic);
 		if (mode & MPSSE_DO_READ) {
-		    unsigned char recv_buffer[2*16*transfer_size];
 			int n;
 			int k = 0;
 			do {
@@ -761,7 +762,11 @@ static int avrftdi_open(PROGRAMMER * pgm, char *port)
 			pdata->tx_buffer_size = 1024;
 			break;
 #else
+#ifdef _MSC_VER
+#pragma message("No support for 232H, use a newer libftdi, version >= 0.20")
+#else
 #warning No support for 232H, use a newer libftdi, version >= 0.20
+#endif
 #endif
 		case TYPE_4232H:
 			pdata->pin_limit = 8;
@@ -953,10 +958,12 @@ static int avrftdi_eeprom_read(PROGRAMMER *pgm, AVRPART *p, AVRMEM *m,
 		unsigned int page_size, unsigned int addr, unsigned int len)
 {
 	unsigned char cmd[4];
-	unsigned char buffer[len], *bufptr = buffer;
 	unsigned int add;
+	unsigned char* buffer = alloca(len);
+	unsigned char* bufptr = buffer;
+
+	memset(buffer, 0, len);
 
-	memset(buffer, 0, sizeof(buffer));
 	for (add = addr; add < addr + len; add++)
 	{
 		memset(cmd, 0, sizeof(cmd));
@@ -980,13 +987,14 @@ static int avrftdi_flash_write(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
 	
 	unsigned int word;
 	unsigned int poll_index;
-	unsigned int buf_size;
 
 	unsigned char poll_byte;
 	unsigned char *buffer = &m->buf[addr];
-	unsigned char buf[4*len+4], *bufptr = buf;
+	unsigned int buf_size = 4 * len + 4;
+	unsigned char* buf = alloca(buf_size);
+	unsigned char* bufptr = buf;
 
-	memset(buf, 0, sizeof(buf));
+	memset(buf, 0, buf_size);
 
 	/* pre-check opcodes */
 	if (m->op[AVR_OP_LOADPAGE_LO] == NULL) {
@@ -1102,13 +1110,13 @@ static int avrftdi_flash_read(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
 	int use_lext_address = m->op[AVR_OP_LOAD_EXT_ADDR] != NULL;
 	unsigned int address = addr/2;
 
-	unsigned char o_buf[4*len+4];
-	unsigned char i_buf[4*len+4];
+	unsigned int buf_size = 4 * len + 4;
+	unsigned char* o_buf = alloca(buf_size);
+	unsigned char* i_buf = alloca(buf_size);
 	unsigned int index;
 
-
-	memset(o_buf, 0, sizeof(o_buf));
-	memset(i_buf, 0, sizeof(i_buf));
+	memset(o_buf, 0, buf_size);
+	memset(i_buf, 0, buf_size);
 
 	/* pre-check opcodes */
 	if (m->op[AVR_OP_READ_LO] == NULL) {
diff --git a/src/avrftdi_private.h b/src/avrftdi_private.h
index e89d250e..3c965ed8 100644
--- a/src/avrftdi_private.h
+++ b/src/avrftdi_private.h
@@ -12,11 +12,14 @@
 # include <libftdi1/ftdi.h>
 # undef HAVE_LIBFTDI_TYPE_232H
 # define HAVE_LIBFTDI_TYPE_232H 1
-#elif defined(HAVE_LIBFTDI) && defined(HAVE_USB_H)
-/* ftdi.h includes usb.h */
+#elif defined(HAVE_LIBFTDI)
 #include <ftdi.h>
 #else 
+#ifdef _MSC_VER
+#pragma message("No libftdi or libusb support. Install libftdi1/libusb-1.0 or libftdi/libusb and run configure/make again.")
+#else
 #warning No libftdi or libusb support. Install libftdi1/libusb-1.0 or libftdi/libusb and run configure/make again.
+#endif
 #define DO_NOT_BUILD_AVRFTDI
 #endif
 
diff --git a/src/bitbang.c b/src/bitbang.c
index fe06c425..592ca124 100644
--- a/src/bitbang.c
+++ b/src/bitbang.c
@@ -17,7 +17,7 @@
  * You should have received a copy of the GNU General Public License
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
-/* $Id$ */
+ /* $Id$ */
 
 #include "ac_cfg.h"
 
@@ -28,9 +28,12 @@
 #include <unistd.h>
 #include <errno.h>
 
-#if !defined(WIN32NATIVE)
-#  include <signal.h>
-#  include <sys/time.h>
+#if defined(WIN32)
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+#else
+#include <signal.h>
+#include <sys/time.h>
 #endif
 
 #include "avrdude.h"
@@ -43,7 +46,7 @@
 
 static int delay_decrement;
 
-#if defined(WIN32NATIVE)
+#if defined(WIN32)
 static int has_perfcount;
 static LARGE_INTEGER freq;
 #else
@@ -57,14 +60,14 @@ static void alarmhandler(int signo)
   done = 1;
   signal(SIGALRM, saved_alarmhandler);
 }
-#endif /* WIN32NATIVE */
+#endif /* WIN32 */
 
 /*
  * Calibrate the microsecond delay loop below.
  */
 static void bitbang_calibrate_delay(void)
 {
-#if defined(WIN32NATIVE)
+#if defined(WIN32)
   /*
    * If the hardware supports a high-resolution performance counter,
    * we ultimately prefer that one, as it gives quite accurate delays
@@ -91,7 +94,7 @@ static void bitbang_calibrate_delay(void)
                     progname);
     delay_decrement = 100;
   }
-#else  /* !WIN32NATIVE */
+#else  /* !WIN32 */
   struct itimerval itv;
   volatile int i;
 
@@ -124,7 +127,7 @@ static void bitbang_calibrate_delay(void)
   delay_decrement = -i / 100000;
   avrdude_message(MSG_NOTICE2, " calibrated to %d cycles per us\n",
                   delay_decrement);
-#endif /* WIN32NATIVE */
+#endif /* WIN32 */
 }
 
 /*
@@ -134,7 +137,7 @@ static void bitbang_calibrate_delay(void)
  */
 void bitbang_delay(unsigned int us)
 {
-#if defined(WIN32NATIVE)
+#if defined(WIN32)
   LARGE_INTEGER countNow, countEnd;
 
   if (has_perfcount)
@@ -147,14 +150,14 @@ void bitbang_delay(unsigned int us)
   }
   else /* no performance counters -- run normal uncalibrated delay */
   {
-#endif  /* WIN32NATIVE */
+#endif  /* WIN32 */
   volatile unsigned int del = us * delay_decrement;
 
   while (del > 0)
     del--;
-#if defined(WIN32NATIVE)
+#if defined(WIN32)
   }
-#endif /* WIN32NATIVE */
+#endif /* WIN32 */
 }
 
 /*
diff --git a/src/buspirate.c b/src/buspirate.c
index 84b2f042..e765797f 100644
--- a/src/buspirate.c
+++ b/src/buspirate.c
@@ -41,9 +41,6 @@
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
-#if defined(WIN32NATIVE)
-#  include <malloc.h>  /* for alloca() */
-#endif
 
 #include "avrdude.h"
 #include "libavrdude.h"
diff --git a/src/cmake_config.h.in b/src/cmake_config.h.in
index d4ca65a6..4b051b04 100644
--- a/src/cmake_config.h.in
+++ b/src/cmake_config.h.in
@@ -35,18 +35,6 @@
 
 /* ----- Functions ----- */
 
-/* Define to 1 if you have the `usleep' function. */
-#cmakedefine HAVE_USLEEP 1
-
-/* Define to 1 if you have the `getaddrinfo' function. */
-#cmakedefine HAVE_GETADDRINFO 1
-
-/* Define to 1 if you have the `gettimeofday' function. */
-#cmakedefine HAVE_GETTIMEOFDAY 1
-
-/* Define to 1 if you have the `strcasecmp' function. */
-#cmakedefine HAVE_STRCASECMP 1
-
 /* Define if lex/flex has yylex_destroy */
 #cmakedefine HAVE_YYLEX_DESTROY 1
 
@@ -61,15 +49,6 @@
 /* Define to 1 if the system has the type `ulong_t'. */
 #cmakedefine HAVE_ULONG_T 1
 
-/* Define to 1 if you have the <stdint.h> header file. */
-#cmakedefine HAVE_STDINT_H 1
-
-/* Define to 1 if you have the <stdlib.h> header file. */
-#cmakedefine HAVE_STDLIB_H 1
-
-/* Define to 1 if you have the <inttypes.h> header file. */
-#cmakedefine HAVE_INTTYPES_H 1
-
 /* Define if ELF support is enabled via libelf */
 #cmakedefine HAVE_LIBELF 1
 
@@ -120,9 +99,3 @@
 
 /* Define to 1 if you have the `readline' library (-lreadline). */
 #cmakedefine HAVE_LIBREADLINE 1
-
-/* Define to 1 if you have the `ws2_32' library (-lws2_32). */
-#cmakedefine HAVE_LIBWS2_32 1
-
-/* Define to 1 if you have the <netinet/in.h> header file. */
-#cmakedefine HAVE_NETINET_IN_H 1
diff --git a/src/config_gram.y b/src/config_gram.y
index 6eb94252..d82fae9e 100644
--- a/src/config_gram.y
+++ b/src/config_gram.y
@@ -30,7 +30,7 @@
 #include "libavrdude.h"
 #include "config.h"
 
-#if defined(WIN32NATIVE)
+#if defined(WIN32)
 #define strtok_r( _s, _sep, _lasts ) \
     ( *(_lasts) = strtok( (_s), (_sep) ) )
 #endif
diff --git a/src/configure.ac b/src/configure.ac
index e6284bc2..5527ad6c 100644
--- a/src/configure.ac
+++ b/src/configure.ac
@@ -228,9 +228,6 @@ AC_HEADER_TIME
 
 AC_CHECK_HEADERS([netinet/in.h])
 
-# WinSock2
-AC_CHECK_LIB([ws2_32], [puts])
-
 # Checks for library functions.
 AC_CHECK_FUNCS([memset select strcasecmp strdup strerror strncasecmp strtol strtoul gettimeofday usleep getaddrinfo])
 
@@ -239,12 +236,7 @@ SAVED_LIBS="${LIBS}"
 case $target in
         *-*-mingw32* | *-*-cygwin* | *-*-windows*)
 		LIBHID="-lhid -lsetupapi"
-		if test $ac_cv_header_ddk_hidsdi_h = yes
-		then
-			HIDINCLUDE="#include <ddk/hidsdi.h>"
-		else
-			HIDINCLUDE="#include \"my_ddk_hidsdi.h\""
-		fi
+		HIDINCLUDE="#include <hidsdi.h>"
 		;;
 	*)
 		LIBHID=""
diff --git a/src/confwin.c b/src/confwin.c
index 1be95e87..9624947f 100644
--- a/src/confwin.c
+++ b/src/confwin.c
@@ -20,15 +20,13 @@
 #include "avrdude.h"
 #include "libavrdude.h"
 
-#if defined(WIN32NATIVE)
+#if defined(WIN32)
 
-#include <limits.h>
+#define WIN32_LEAN_AND_MEAN
 #include <windows.h>
 
-
 static char *filename;
 
-
 void win_sys_config_set(char sys_config[PATH_MAX])
 {
     sys_config[0] = 0;
@@ -38,7 +36,6 @@ void win_sys_config_set(char sys_config[PATH_MAX])
     return;
 }
 
-
 void win_usr_config_set(char usr_config[PATH_MAX])
 {
     usr_config[0] = 0;
@@ -48,7 +45,4 @@ void win_usr_config_set(char usr_config[PATH_MAX])
     return;
 }
 
-
 #endif
-
-
diff --git a/src/dfu.h b/src/dfu.h
index 020a75f2..fa5da416 100644
--- a/src/dfu.h
+++ b/src/dfu.h
@@ -61,7 +61,7 @@ struct dfu_dev
 #else
 
 struct dfu_dev {
-  // empty
+  int dummy;
 };
 
 #endif
diff --git a/src/fileio.c b/src/fileio.c
index 37a3259e..7c021ce4 100644
--- a/src/fileio.c
+++ b/src/fileio.c
@@ -1369,7 +1369,7 @@ static int fmt_autodetect(char * fname)
   int found;
   int first = 1;
 
-#if defined(WIN32NATIVE)
+#if defined(WIN32)
   f = fopen(fname, "r");
 #else
   f = fopen(fname, "rb");
@@ -1518,7 +1518,7 @@ int fileio(int op, char * filename, FILEFMT format,
     }
   }
 
-#if defined(WIN32NATIVE)
+#if defined(WIN32)
   /* Open Raw Binary and ELF format in binary mode on Windows.*/
   if(format == FMT_RBIN || format == FMT_ELF)
   {
diff --git a/src/flip1.c b/src/flip1.c
index 220a9426..0c8a3ab2 100644
--- a/src/flip1.c
+++ b/src/flip1.c
@@ -23,6 +23,7 @@
 
 #include "ac_cfg.h"
 
+#include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -30,13 +31,6 @@
 #include <limits.h>
 #include <unistd.h>
 
-#if HAVE_STDINT_H
-#include <stdint.h>
-#elif HAVE_INTTYPES_H
-#include <inttypes.h>
-#endif
-
-
 #include "avrdude.h"
 #include "libavrdude.h"
 
diff --git a/src/flip2.c b/src/flip2.c
index 6f659d51..750be244 100644
--- a/src/flip2.c
+++ b/src/flip2.c
@@ -20,6 +20,7 @@
 
 #include "ac_cfg.h"
 
+#include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -27,12 +28,6 @@
 #include <limits.h>
 #include <unistd.h>
 
-#if HAVE_STDINT_H
-#include <stdint.h>
-#elif HAVE_INTTYPES_H
-#include <inttypes.h>
-#endif
-
 #include "avrdude.h"
 #include "libavrdude.h"
 
@@ -617,7 +612,7 @@ int flip2_read_memory(struct dfu_dev *dfu,
       return -1;
     }
 
-    ptr += read_size;
+    ptr = (char*)ptr + read_size;
     addr += read_size;
     size -= read_size;
   }
@@ -680,7 +675,7 @@ int flip2_write_memory(struct dfu_dev *dfu,
       return -1;
     }
 
-    ptr += write_size;
+    ptr = (const char*)ptr + write_size;
     addr += write_size;
     size -= write_size;
   }
diff --git a/src/ft245r.c b/src/ft245r.c
index 3964bd6a..d009d9ed 100644
--- a/src/ft245r.c
+++ b/src/ft245r.c
@@ -73,10 +73,6 @@
 #define TPIPCR_GT_0b	0x07
 #define TPI_STOP_BITS	0x03
 
-#if defined(_WIN32)
-#include <windows.h>
-#endif
-
 #if defined(HAVE_LIBFTDI1) && defined(HAVE_LIBUSB_1_0)
 # if defined(HAVE_LIBUSB_1_0_LIBUSB_H)
 #  include <libusb-1.0/libusb.h>
@@ -84,11 +80,14 @@
 #  include <libusb.h>
 # endif
 # include <libftdi1/ftdi.h>
-#elif defined(HAVE_LIBFTDI) && defined(HAVE_USB_H)
-/* ftdi.h includes usb.h */
+#elif defined(HAVE_LIBFTDI)
 #include <ftdi.h>
 #else 
+#ifdef _MSC_VER
+#pragma message("No libftdi or libusb support. Install libftdi1/libusb-1.0 or libftdi/libusb and run configure/make again.")
+#else
 #warning No libftdi or libusb support. Install libftdi1/libusb-1.0 or libftdi/libusb and run configure/make again.
+#endif
 #define DO_NOT_BUILD_FT245R
 #endif
 
diff --git a/src/libavrdude.h b/src/libavrdude.h
index 0d1bf3a3..40b49b53 100644
--- a/src/libavrdude.h
+++ b/src/libavrdude.h
@@ -27,15 +27,9 @@
 #include <stdio.h>
 #include <limits.h>
 #include <stdbool.h>
-
-/* lets try to select at least 32 bits */
-#ifdef HAVE_STDINT_H
 #include <stdint.h>
-typedef uint32_t pinmask_t;
-#else
-#error Need a C99 capable compiler
-#endif
 
+typedef uint32_t pinmask_t;
 
 /* formerly lists.h */
 
@@ -958,7 +952,7 @@ int read_config(const char * file);
 
 /* formerly confwin.h */
 
-#if defined(WIN32NATIVE)
+#if defined(WIN32)
 
 #ifdef __cplusplus
 extern "C" {
@@ -971,7 +965,7 @@ void win_usr_config_set(char usr_config[PATH_MAX]);
 }
 #endif
 
-#endif  /* WIN32NATIVE */
+#endif  /* WIN32 */
 
 
 #endif  /* libavrdude_h */
diff --git a/src/main.c b/src/main.c
index dda194be..6fd432ec 100644
--- a/src/main.c
+++ b/src/main.c
@@ -362,7 +362,7 @@ int main(int argc, char * argv [])
 
   char * safemode_response;
   int fuses_updated = 0;
-#if !defined(WIN32NATIVE)
+#if !defined(WIN32)
   char  * homedir;
 #endif
 
@@ -377,10 +377,10 @@ int main(int argc, char * argv [])
 
   progname = strrchr(argv[0],'/');
 
-#if defined (WIN32NATIVE)
+#if defined (WIN32)
   /* take care of backslash as dir sep in W32 */
   if (!progname) progname = strrchr(argv[0],'\\');
-#endif /* WIN32NATIVE */
+#endif /* WIN32 */
 
   if (progname)
     progname++;
@@ -730,7 +730,7 @@ int main(int argc, char * argv [])
     }
     if (!sys_config_found) {
       // 3. Check CONFIG_DIR/avrdude.conf
-#if defined(WIN32NATIVE)
+#if defined(WIN32)
       win_sys_config_set(sys_config);
 #else
       strcpy(sys_config, CONFIG_DIR);
@@ -754,7 +754,7 @@ int main(int argc, char * argv [])
    * -----------
    * Determine the location of '.avrduderc'.
    */
-#if defined(WIN32NATIVE)
+#if defined(WIN32)
   win_usr_config_set(usr_config);
 #else
   usr_config[0] = 0;
diff --git a/src/msvc/getopt.c b/src/msvc/getopt.c
new file mode 100644
index 00000000..9a0347d4
--- /dev/null
+++ b/src/msvc/getopt.c
@@ -0,0 +1,563 @@
+/*	$OpenBSD: getopt_long.c,v 1.23 2007/10/31 12:34:57 chl Exp $	*/
+/*	$NetBSD: getopt_long.c,v 1.15 2002/01/31 22:43:40 tv Exp $	*/
+
+/*
+ * Copyright (c) 2002 Todd C. Miller <Todd.Miller@courtesan.com>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ * Sponsored in part by the Defense Advanced Research Projects
+ * Agency (DARPA) and Air Force Research Laboratory, Air Force
+ * Materiel Command, USAF, under agreement number F39502-99-1-0512.
+ */
+/*-
+ * Copyright (c) 2000 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Dieter Baron and Thomas Klausner.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#define WIN32_LEAN_AND_MEAN
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+#include <getopt.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <windows.h>
+
+#define	REPLACE_GETOPT		/* use this getopt as the system getopt(3) */
+
+#ifdef REPLACE_GETOPT
+int	opterr = 1;		/* if error message should be printed */
+int	optind = 1;		/* index into parent argv vector */
+int	optopt = '?';		/* character checked for validity */
+#undef	optreset		/* see getopt.h */
+#define	optreset		__mingw_optreset
+int	optreset;		/* reset getopt */
+char    *optarg;		/* argument associated with option */
+#endif
+
+#define PRINT_ERROR	((opterr) && (*options != ':'))
+
+#define FLAG_PERMUTE	0x01	/* permute non-options to the end of argv */
+#define FLAG_ALLARGS	0x02	/* treat non-options as args to option "-1" */
+#define FLAG_LONGONLY	0x04	/* operate as getopt_long_only */
+
+/* return values */
+#define	BADCH		(int)'?'
+#define	BADARG		((*options == ':') ? (int)':' : (int)'?')
+#define	INORDER 	(int)1
+
+#ifndef __CYGWIN__
+#define __progname __argv[0]
+#else
+extern char __declspec(dllimport) *__progname;
+#endif
+
+#ifdef __CYGWIN__
+static char EMSG[] = "";
+#else
+#define	EMSG		""
+#endif
+
+static int getopt_internal(int, char * const *, const char *,
+			   const struct option *, int *, int);
+static int parse_long_options(char * const *, const char *,
+			      const struct option *, int *, int);
+static int gcd(int, int);
+static void permute_args(int, int, int, char * const *);
+
+static char *place = EMSG; /* option letter processing */
+
+/* XXX: set optreset to 1 rather than these two */
+static int nonopt_start = -1; /* first non option argument (for permute) */
+static int nonopt_end = -1;   /* first option after non options (for permute) */
+
+/* Error messages */
+static const char recargchar[] = "option requires an argument -- %c";
+static const char recargstring[] = "option requires an argument -- %s";
+static const char ambig[] = "ambiguous option -- %.*s";
+static const char noarg[] = "option doesn't take an argument -- %.*s";
+static const char illoptchar[] = "unknown option -- %c";
+static const char illoptstring[] = "unknown option -- %s";
+
+static void
+_vwarnx(const char *fmt,va_list ap)
+{
+  (void)fprintf(stderr,"%s: ",__progname);
+  if (fmt != NULL)
+    (void)vfprintf(stderr,fmt,ap);
+  (void)fprintf(stderr,"\n");
+}
+
+static void
+warnx(const char *fmt,...)
+{
+  va_list ap;
+  va_start(ap,fmt);
+  _vwarnx(fmt,ap);
+  va_end(ap);
+}
+
+/*
+ * Compute the greatest common divisor of a and b.
+ */
+static int
+gcd(int a, int b)
+{
+	int c;
+
+	c = a % b;
+	while (c != 0) {
+		a = b;
+		b = c;
+		c = a % b;
+	}
+
+	return (b);
+}
+
+/*
+ * Exchange the block from nonopt_start to nonopt_end with the block
+ * from nonopt_end to opt_end (keeping the same order of arguments
+ * in each block).
+ */
+static void
+permute_args(int panonopt_start, int panonopt_end, int opt_end,
+	char * const *nargv)
+{
+	int cstart, cyclelen, i, j, ncycle, nnonopts, nopts, pos;
+	char *swap;
+
+	/*
+	 * compute lengths of blocks and number and size of cycles
+	 */
+	nnonopts = panonopt_end - panonopt_start;
+	nopts = opt_end - panonopt_end;
+	ncycle = gcd(nnonopts, nopts);
+	cyclelen = (opt_end - panonopt_start) / ncycle;
+
+	for (i = 0; i < ncycle; i++) {
+		cstart = panonopt_end+i;
+		pos = cstart;
+		for (j = 0; j < cyclelen; j++) {
+			if (pos >= panonopt_end)
+				pos -= nnonopts;
+			else
+				pos += nopts;
+			swap = nargv[pos];
+			/* LINTED const cast */
+			((char **) nargv)[pos] = nargv[cstart];
+			/* LINTED const cast */
+			((char **)nargv)[cstart] = swap;
+		}
+	}
+}
+
+/*
+ * parse_long_options --
+ *	Parse long options in argc/argv argument vector.
+ * Returns -1 if short_too is set and the option does not match long_options.
+ */
+static int
+parse_long_options(char * const *nargv, const char *options,
+	const struct option *long_options, int *idx, int short_too)
+{
+	char *current_argv, *has_equal;
+	size_t current_argv_len;
+	int i, ambiguous, match;
+
+#define IDENTICAL_INTERPRETATION(_x, _y)                                \
+	(long_options[(_x)].has_arg == long_options[(_y)].has_arg &&    \
+	 long_options[(_x)].flag == long_options[(_y)].flag &&          \
+	 long_options[(_x)].val == long_options[(_y)].val)
+
+	current_argv = place;
+	match = -1;
+	ambiguous = 0;
+
+	optind++;
+
+	if ((has_equal = strchr(current_argv, '=')) != NULL) {
+		/* argument found (--option=arg) */
+		current_argv_len = has_equal - current_argv;
+		has_equal++;
+	} else
+		current_argv_len = strlen(current_argv);
+
+	for (i = 0; long_options[i].name; i++) {
+		/* find matching long option */
+		if (strncmp(current_argv, long_options[i].name,
+		    current_argv_len))
+			continue;
+
+		if (strlen(long_options[i].name) == current_argv_len) {
+			/* exact match */
+			match = i;
+			ambiguous = 0;
+			break;
+		}
+		/*
+		 * If this is a known short option, don't allow
+		 * a partial match of a single character.
+		 */
+		if (short_too && current_argv_len == 1)
+			continue;
+
+		if (match == -1)	/* partial match */
+			match = i;
+		else if (!IDENTICAL_INTERPRETATION(i, match))
+			ambiguous = 1;
+	}
+	if (ambiguous) {
+		/* ambiguous abbreviation */
+		if (PRINT_ERROR)
+			warnx(ambig, (int)current_argv_len,
+			     current_argv);
+		optopt = 0;
+		return (BADCH);
+	}
+	if (match != -1) {		/* option found */
+		if (long_options[match].has_arg == no_argument
+		    && has_equal) {
+			if (PRINT_ERROR)
+				warnx(noarg, (int)current_argv_len,
+				     current_argv);
+			/*
+			 * XXX: GNU sets optopt to val regardless of flag
+			 */
+			if (long_options[match].flag == NULL)
+				optopt = long_options[match].val;
+			else
+				optopt = 0;
+			return (BADARG);
+		}
+		if (long_options[match].has_arg == required_argument ||
+		    long_options[match].has_arg == optional_argument) {
+			if (has_equal)
+				optarg = has_equal;
+			else if (long_options[match].has_arg ==
+			    required_argument) {
+				/*
+				 * optional argument doesn't use next nargv
+				 */
+				optarg = nargv[optind++];
+			}
+		}
+		if ((long_options[match].has_arg == required_argument)
+		    && (optarg == NULL)) {
+			/*
+			 * Missing argument; leading ':' indicates no error
+			 * should be generated.
+			 */
+			if (PRINT_ERROR)
+				warnx(recargstring,
+				    current_argv);
+			/*
+			 * XXX: GNU sets optopt to val regardless of flag
+			 */
+			if (long_options[match].flag == NULL)
+				optopt = long_options[match].val;
+			else
+				optopt = 0;
+			--optind;
+			return (BADARG);
+		}
+	} else {			/* unknown option */
+		if (short_too) {
+			--optind;
+			return (-1);
+		}
+		if (PRINT_ERROR)
+			warnx(illoptstring, current_argv);
+		optopt = 0;
+		return (BADCH);
+	}
+	if (idx)
+		*idx = match;
+	if (long_options[match].flag) {
+		*long_options[match].flag = long_options[match].val;
+		return (0);
+	} else
+		return (long_options[match].val);
+#undef IDENTICAL_INTERPRETATION
+}
+
+/*
+ * getopt_internal --
+ *	Parse argc/argv argument vector.  Called by user level routines.
+ */
+static int
+getopt_internal(int nargc, char * const *nargv, const char *options,
+	const struct option *long_options, int *idx, int flags)
+{
+	char *oli;				/* option letter list index */
+	int optchar, short_too;
+	static int posixly_correct = -1;
+
+	if (options == NULL)
+		return (-1);
+
+	/*
+	 * XXX Some GNU programs (like cvs) set optind to 0 instead of
+	 * XXX using optreset.  Work around this braindamage.
+	 */
+	if (optind == 0)
+		optind = optreset = 1;
+
+	/*
+	 * Disable GNU extensions if POSIXLY_CORRECT is set or options
+	 * string begins with a '+'.
+	 *
+	 * CV, 2009-12-14: Check POSIXLY_CORRECT anew if optind == 0 or
+	 *                 optreset != 0 for GNU compatibility.
+	 */
+	if (posixly_correct == -1 || optreset != 0)
+		posixly_correct = (getenv("POSIXLY_CORRECT") != NULL);
+	if (*options == '-')
+		flags |= FLAG_ALLARGS;
+	else if (posixly_correct || *options == '+')
+		flags &= ~FLAG_PERMUTE;
+	if (*options == '+' || *options == '-')
+		options++;
+
+	optarg = NULL;
+	if (optreset)
+		nonopt_start = nonopt_end = -1;
+start:
+	if (optreset || !*place) {		/* update scanning pointer */
+		optreset = 0;
+		if (optind >= nargc) {          /* end of argument vector */
+			place = EMSG;
+			if (nonopt_end != -1) {
+				/* do permutation, if we have to */
+				permute_args(nonopt_start, nonopt_end,
+				    optind, nargv);
+				optind -= nonopt_end - nonopt_start;
+			}
+			else if (nonopt_start != -1) {
+				/*
+				 * If we skipped non-options, set optind
+				 * to the first of them.
+				 */
+				optind = nonopt_start;
+			}
+			nonopt_start = nonopt_end = -1;
+			return (-1);
+		}
+		if (*(place = nargv[optind]) != '-' ||
+		    (place[1] == '\0' && strchr(options, '-') == NULL)) {
+			place = EMSG;		/* found non-option */
+			if (flags & FLAG_ALLARGS) {
+				/*
+				 * GNU extension:
+				 * return non-option as argument to option 1
+				 */
+				optarg = nargv[optind++];
+				return (INORDER);
+			}
+			if (!(flags & FLAG_PERMUTE)) {
+				/*
+				 * If no permutation wanted, stop parsing
+				 * at first non-option.
+				 */
+				return (-1);
+			}
+			/* do permutation */
+			if (nonopt_start == -1)
+				nonopt_start = optind;
+			else if (nonopt_end != -1) {
+				permute_args(nonopt_start, nonopt_end,
+				    optind, nargv);
+				nonopt_start = optind -
+				    (nonopt_end - nonopt_start);
+				nonopt_end = -1;
+			}
+			optind++;
+			/* process next argument */
+			goto start;
+		}
+		if (nonopt_start != -1 && nonopt_end == -1)
+			nonopt_end = optind;
+
+		/*
+		 * If we have "-" do nothing, if "--" we are done.
+		 */
+		if (place[1] != '\0' && *++place == '-' && place[1] == '\0') {
+			optind++;
+			place = EMSG;
+			/*
+			 * We found an option (--), so if we skipped
+			 * non-options, we have to permute.
+			 */
+			if (nonopt_end != -1) {
+				permute_args(nonopt_start, nonopt_end,
+				    optind, nargv);
+				optind -= nonopt_end - nonopt_start;
+			}
+			nonopt_start = nonopt_end = -1;
+			return (-1);
+		}
+	}
+
+	/*
+	 * Check long options if:
+	 *  1) we were passed some
+	 *  2) the arg is not just "-"
+	 *  3) either the arg starts with -- we are getopt_long_only()
+	 */
+	if (long_options != NULL && place != nargv[optind] &&
+	    (*place == '-' || (flags & FLAG_LONGONLY))) {
+		short_too = 0;
+		if (*place == '-')
+			place++;		/* --foo long option */
+		else if (*place != ':' && strchr(options, *place) != NULL)
+			short_too = 1;		/* could be short option too */
+
+		optchar = parse_long_options(nargv, options, long_options,
+		    idx, short_too);
+		if (optchar != -1) {
+			place = EMSG;
+			return (optchar);
+		}
+	}
+
+	if ((optchar = (int)*place++) == (int)':' ||
+	    (optchar == (int)'-' && *place != '\0') ||
+	    (oli = strchr(options, optchar)) == NULL) {
+		/*
+		 * If the user specified "-" and  '-' isn't listed in
+		 * options, return -1 (non-option) as per POSIX.
+		 * Otherwise, it is an unknown option character (or ':').
+		 */
+		if (optchar == (int)'-' && *place == '\0')
+			return (-1);
+		if (!*place)
+			++optind;
+		if (PRINT_ERROR)
+			warnx(illoptchar, optchar);
+		optopt = optchar;
+		return (BADCH);
+	}
+	if (long_options != NULL && optchar == 'W' && oli[1] == ';') {
+		/* -W long-option */
+		if (*place)			/* no space */
+			/* NOTHING */;
+		else if (++optind >= nargc) {	/* no arg */
+			place = EMSG;
+			if (PRINT_ERROR)
+				warnx(recargchar, optchar);
+			optopt = optchar;
+			return (BADARG);
+		} else				/* white space */
+			place = nargv[optind];
+		optchar = parse_long_options(nargv, options, long_options,
+		    idx, 0);
+		place = EMSG;
+		return (optchar);
+	}
+	if (*++oli != ':') {			/* doesn't take argument */
+		if (!*place)
+			++optind;
+	} else {				/* takes (optional) argument */
+		optarg = NULL;
+		if (*place)			/* no white space */
+			optarg = place;
+		else if (oli[1] != ':') {	/* arg not optional */
+			if (++optind >= nargc) {	/* no arg */
+				place = EMSG;
+				if (PRINT_ERROR)
+					warnx(recargchar, optchar);
+				optopt = optchar;
+				return (BADARG);
+			} else
+				optarg = nargv[optind];
+		}
+		place = EMSG;
+		++optind;
+	}
+	/* dump back option letter */
+	return (optchar);
+}
+
+#ifdef REPLACE_GETOPT
+/*
+ * getopt --
+ *	Parse argc/argv argument vector.
+ *
+ * [eventually this will replace the BSD getopt]
+ */
+int
+getopt(int nargc, char * const *nargv, const char *options)
+{
+
+	/*
+	 * We don't pass FLAG_PERMUTE to getopt_internal() since
+	 * the BSD getopt(3) (unlike GNU) has never done this.
+	 *
+	 * Furthermore, since many privileged programs call getopt()
+	 * before dropping privileges it makes sense to keep things
+	 * as simple (and bug-free) as possible.
+	 */
+	return (getopt_internal(nargc, nargv, options, NULL, NULL, 0));
+}
+#endif /* REPLACE_GETOPT */
+
+/*
+ * getopt_long --
+ *	Parse argc/argv argument vector.
+ */
+int
+getopt_long(int nargc, char * const *nargv, const char *options,
+    const struct option *long_options, int *idx)
+{
+
+	return (getopt_internal(nargc, nargv, options, long_options, idx,
+	    FLAG_PERMUTE));
+}
+
+/*
+ * getopt_long_only --
+ *	Parse argc/argv argument vector.
+ */
+int
+getopt_long_only(int nargc, char * const *nargv, const char *options,
+    const struct option *long_options, int *idx)
+{
+
+	return (getopt_internal(nargc, nargv, options, long_options, idx,
+	    FLAG_PERMUTE|FLAG_LONGONLY));
+}
diff --git a/src/msvc/getopt.h b/src/msvc/getopt.h
new file mode 100644
index 00000000..1922a0ef
--- /dev/null
+++ b/src/msvc/getopt.h
@@ -0,0 +1,95 @@
+#ifndef __GETOPT_H__
+/**
+ * DISCLAIMER
+ * This file has no copyright assigned and is placed in the Public Domain.
+ * This file is part of the mingw-w64 runtime package.
+ *
+ * The mingw-w64 runtime package and its code is distributed in the hope that it 
+ * will be useful but WITHOUT ANY WARRANTY.  ALL WARRANTIES, EXPRESSED OR 
+ * IMPLIED ARE HEREBY DISCLAIMED.  This includes but is not limited to 
+ * warranties of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ */
+
+#define __GETOPT_H__
+
+/* All the headers include this file. */
+#include <crtdefs.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+extern int optind;		/* index of first non-option in argv      */
+extern int optopt;		/* single option character, as parsed     */
+extern int opterr;		/* flag to enable built-in diagnostics... */
+				/* (user may set to zero, to suppress)    */
+
+extern char *optarg;		/* pointer to argument of current option  */
+
+extern int getopt(int nargc, char * const *nargv, const char *options);
+
+#ifdef _BSD_SOURCE
+/*
+ * BSD adds the non-standard `optreset' feature, for reinitialisation
+ * of `getopt' parsing.  We support this feature, for applications which
+ * proclaim their BSD heritage, before including this header; however,
+ * to maintain portability, developers are advised to avoid it.
+ */
+# define optreset  __mingw_optreset
+extern int optreset;
+#endif
+#ifdef __cplusplus
+}
+#endif
+/*
+ * POSIX requires the `getopt' API to be specified in `unistd.h';
+ * thus, `unistd.h' includes this header.  However, we do not want
+ * to expose the `getopt_long' or `getopt_long_only' APIs, when
+ * included in this manner.  Thus, close the standard __GETOPT_H__
+ * declarations block, and open an additional __GETOPT_LONG_H__
+ * specific block, only when *not* __UNISTD_H_SOURCED__, in which
+ * to declare the extended API.
+ */
+#endif /* !defined(__GETOPT_H__) */
+
+#if !defined(__UNISTD_H_SOURCED__) && !defined(__GETOPT_LONG_H__)
+#define __GETOPT_LONG_H__
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct option		/* specification for a long form option...	*/
+{
+  const char *name;		/* option name, without leading hyphens */
+  int         has_arg;		/* does it take an argument?		*/
+  int        *flag;		/* where to save its status, or NULL	*/
+  int         val;		/* its associated status value		*/
+};
+
+enum    		/* permitted values for its `has_arg' field...	*/
+{
+  no_argument = 0,      	/* option never takes an argument	*/
+  required_argument,		/* option always requires an argument	*/
+  optional_argument		/* option may take an argument		*/
+};
+
+extern int getopt_long(int nargc, char * const *nargv, const char *options,
+    const struct option *long_options, int *idx);
+extern int getopt_long_only(int nargc, char * const *nargv, const char *options,
+    const struct option *long_options, int *idx);
+/*
+ * Previous MinGW implementation had...
+ */
+#ifndef HAVE_DECL_GETOPT
+/*
+ * ...for the long form API only; keep this for compatibility.
+ */
+# define HAVE_DECL_GETOPT	1
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* !defined(__UNISTD_H_SOURCED__) && !defined(__GETOPT_LONG_H__) */
diff --git a/src/msvc/gettimeofday.c b/src/msvc/gettimeofday.c
new file mode 100644
index 00000000..eb62d0c7
--- /dev/null
+++ b/src/msvc/gettimeofday.c
@@ -0,0 +1,77 @@
+/**
+* This file has no copyright assigned and is placed in the Public Domain.
+* This file is part of the mingw-w64 runtime package.
+* No warranty is given; refer to the file DISCLAIMER.PD within this package.
+*/
+#define WIN32_LEAN_AND_MEAN
+#include <time.h>
+#include <sys/time.h>
+#include <sys/timeb.h>
+#include <errno.h>
+#include <windows.h>
+
+#define FILETIME_1970 116444736000000000ull /* seconds between 1/1/1601 and 1/1/1970 */
+#define HECTONANOSEC_PER_SEC 10000000ull
+
+int getntptimeofday(struct timespec *, struct timezone *);
+
+int getntptimeofday(struct timespec *tp, struct timezone *z)
+{
+    int res = 0;
+    union
+    {
+        unsigned long long ns100; /*time since 1 Jan 1601 in 100ns units */
+        FILETIME ft;
+    }  _now;
+    TIME_ZONE_INFORMATION  TimeZoneInformation;
+    DWORD tzi;
+
+    if (z != NULL)
+    {
+        if ((tzi = GetTimeZoneInformation(&TimeZoneInformation)) != TIME_ZONE_ID_INVALID)
+        {
+            z->tz_minuteswest = TimeZoneInformation.Bias;
+            if (tzi == TIME_ZONE_ID_DAYLIGHT)
+                z->tz_dsttime = 1;
+            else
+                z->tz_dsttime = 0;
+        }
+        else
+        {
+            z->tz_minuteswest = 0;
+            z->tz_dsttime = 0;
+        }
+    }
+
+    if (tp != NULL)
+    {
+        GetSystemTimeAsFileTime(&_now.ft);	 /* 100-nanoseconds since 1-1-1601 */
+                                             /* The actual accuracy on XP seems to be 125,000 nanoseconds = 125 microseconds = 0.125 milliseconds */
+        _now.ns100 -= FILETIME_1970;	/* 100 nano-seconds since 1-1-1970 */
+        tp->tv_sec = _now.ns100 / HECTONANOSEC_PER_SEC;	/* seconds since 1-1-1970 */
+        tp->tv_nsec = (long)(_now.ns100 % HECTONANOSEC_PER_SEC) * 100; /* nanoseconds */
+    }
+    return res;
+}
+
+int __cdecl gettimeofday(struct timeval *p, void *z)
+{
+    struct timespec tp;
+
+    if (getntptimeofday(&tp, (struct timezone *) z))
+        return -1;
+    p->tv_sec = (long)tp.tv_sec;
+    p->tv_usec = (tp.tv_nsec / 1000);
+    return 0;
+}
+
+int __cdecl mingw_gettimeofday(struct timeval *p, struct timezone *z)
+{
+    struct timespec tp;
+
+    if (getntptimeofday(&tp, z))
+        return -1;
+    p->tv_sec = (long)tp.tv_sec;
+    p->tv_usec = (tp.tv_nsec / 1000);
+    return 0;
+}
diff --git a/src/msvc/msvc_compat.h b/src/msvc/msvc_compat.h
new file mode 100644
index 00000000..aef86b05
--- /dev/null
+++ b/src/msvc/msvc_compat.h
@@ -0,0 +1,60 @@
+/*
+ * avrdude - A Downloader/Uploader for AVR device programmers
+ * Copyright (C) 2018 Marius Greuel
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <io.h>
+#include <intrin.h> 
+#include <malloc.h> 
+
+#pragma comment(lib, "hid.lib")
+#pragma comment(lib, "ws2_32.lib")
+#pragma comment(lib, "setupapi.lib")
+
+#define F_OK 0
+
+#define PATH_MAX _MAX_PATH
+
+#define __builtin_popcount __popcnt 
+
+#define setvbuf msvc_setvbuf
+
+static inline int msvc_setvbuf(
+    FILE* const public_stream,
+    char* const buffer,
+    int const type,
+    size_t const buffer_size_in_bytes
+)
+{
+    // Just ignore calls to setvbuf with invalid buffer size.
+    // Purpose of setvbuf calls unknown, probably in an attempt to fix broken
+    // programs that capture stdout and stderr using separate stream handles?
+    return 0;
+}
+
+static inline int strcasecmp(const char* s1, const char* s2)
+{
+    return _stricmp(s1, s2);
+}
+
+static inline int strncasecmp(const char* s1, const char* s2, size_t n)
+{
+    return _strnicmp(s1, s2, n);
+}
diff --git a/src/msvc/sys/time.h b/src/msvc/sys/time.h
new file mode 100644
index 00000000..d5c3a8c4
--- /dev/null
+++ b/src/msvc/sys/time.h
@@ -0,0 +1,43 @@
+/*
+ * avrdude - A Downloader/Uploader for AVR device programmers
+ * Copyright (C) 2018 Marius Greuel
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _TIME_H_
+#define _TIME_H_
+
+// If you need both <windows.h> and <sys/time.h>,
+// make sure you include <windows.h> first.
+#ifndef _WINSOCKAPI_
+#ifndef _TIMEVAL_DEFINED
+#define _TIMEVAL_DEFINED
+struct timeval
+{
+    long tv_sec;
+    long tv_usec;
+};
+#endif /* _TIMEVAL_DEFINED */
+#endif /* _WINSOCKAPI_ */
+
+struct timezone
+{
+    int tz_minuteswest;
+    int tz_dsttime;
+};
+
+int __cdecl gettimeofday(struct timeval* p, void* z);
+
+#endif
diff --git a/src/msvc/unistd.h b/src/msvc/unistd.h
new file mode 100644
index 00000000..49d5114e
--- /dev/null
+++ b/src/msvc/unistd.h
@@ -0,0 +1,38 @@
+/*
+ * avrdude - A Downloader/Uploader for AVR device programmers
+ * Copyright (C) 2018 Marius Greuel
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _UNISTD_H
+#define _UNISTD_H
+
+#define STDIN_FILENO _fileno(stdin)
+#define STDERR_FILENO _fileno(stderr)
+
+#include <getopt.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef unsigned int useconds_t;
+int usleep(unsigned int us);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/src/msvc/usleep.cpp b/src/msvc/usleep.cpp
new file mode 100644
index 00000000..6759b721
--- /dev/null
+++ b/src/msvc/usleep.cpp
@@ -0,0 +1,93 @@
+/*
+ * avrdude - A Downloader/Uploader for AVR device programmers
+ * Copyright (C) 2018 Marius Greuel
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "unistd.h"
+
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+#include <mmsystem.h>
+#pragma comment(lib, "winmm.lib")
+
+class MicroSleep
+{
+public:
+    MicroSleep()
+    {
+        if (::timeBeginPeriod(timerPeriod) == TIMERR_NOERROR)
+        {
+            m_resetTimerPeriod = true;
+        }
+    }
+
+    ~MicroSleep()
+    {
+        if (m_resetTimerPeriod)
+        {
+            ::timeEndPeriod(timerPeriod);
+        }
+    }
+
+    int Sleep(DWORD us)
+    {
+        if (us == 0)
+        {
+            return 0;
+        }
+
+        LARGE_INTEGER frequency{};
+        if (QueryPerformanceFrequency(&frequency))
+        {
+            LARGE_INTEGER start{};
+            QueryPerformanceCounter(&start);
+
+            if (us > 10000)
+            {
+                ::Sleep((us - 5000) / 1000);
+            }
+
+            LARGE_INTEGER end{};
+            end.QuadPart = start.QuadPart + (frequency.QuadPart * us / 1000000);
+
+            while (true)
+            {
+                LARGE_INTEGER current;
+                QueryPerformanceCounter(&current);
+                if (current.QuadPart >= end.QuadPart)
+                {
+                    break;
+                }
+            }
+        }
+        else
+        {
+            ::Sleep((us / 1000) + 1);
+        }
+
+        return 0;
+    }
+
+private:
+    static const UINT timerPeriod = 1; // 1ms
+    bool m_resetTimerPeriod = false;
+};
+
+int usleep(unsigned int us)
+{
+    static MicroSleep microSleep;
+    return microSleep.Sleep(us);
+}
diff --git a/src/my_ddk_hidsdi.h b/src/my_ddk_hidsdi.h
deleted file mode 100644
index 46c17d67..00000000
--- a/src/my_ddk_hidsdi.h
+++ /dev/null
@@ -1,48 +0,0 @@
-/*
- * avrdude - A Downloader/Uploader for AVR device programmers
- * Copyright (C) 2006 Christian Starkjohann
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-
-/* $Id$ */
-
-/*
-The following is a replacement for hidsdi.h from the Windows DDK. It defines some
-of the types and function prototypes of this header for our project. If you
-have the Windows DDK version of this file or a version shipped with MinGW, use
-that instead.
-*/
-#ifndef MY_DDK_HIDSDI_H
-#define MY_DDK_HIDSDI_H
-#include <pshpack4.h>
-#include <ddk/hidusage.h>
-#include <ddk/hidpi.h>
-typedef struct{
-    ULONG   Size;
-    USHORT  VendorID;
-    USHORT  ProductID;
-    USHORT  VersionNumber;
-}HIDD_ATTRIBUTES;
-void __stdcall      HidD_GetHidGuid(OUT LPGUID hidGuid);
-BOOLEAN __stdcall   HidD_GetAttributes(IN HANDLE device, OUT HIDD_ATTRIBUTES *attributes);
-BOOLEAN __stdcall   HidD_GetManufacturerString(IN HANDLE device, OUT void *buffer, IN ULONG bufferLen);
-BOOLEAN __stdcall   HidD_GetProductString(IN HANDLE device, OUT void *buffer, IN ULONG bufferLen);
-BOOLEAN __stdcall   HidD_GetSerialNumberString(IN HANDLE device, OUT void *buffer, IN ULONG bufferLen);
-BOOLEAN __stdcall   HidD_GetFeature(IN HANDLE device, OUT void *reportBuffer, IN ULONG bufferLen);
-BOOLEAN __stdcall   HidD_SetFeature(IN HANDLE device, IN void *reportBuffer, IN ULONG bufferLen);
-BOOLEAN __stdcall   HidD_GetNumInputBuffers(IN HANDLE device, OUT ULONG *numBuffers);
-BOOLEAN __stdcall   HidD_SetNumInputBuffers(IN HANDLE device, OUT ULONG numBuffers);
-#include <poppack.h>
-#endif /* MY_DDK_HIDSDI_H */
diff --git a/src/pickit2.c b/src/pickit2.c
index 5a0a5f6c..9e4be94c 100644
--- a/src/pickit2.c
+++ b/src/pickit2.c
@@ -54,15 +54,12 @@
 #include "avrdude.h"
 #include "libavrdude.h"
 
-#if defined(HAVE_LIBUSB) || (defined(WIN32NATIVE) && defined(HAVE_LIBHID))
+#if defined(HAVE_LIBUSB) || (defined(WIN32) && defined(HAVE_LIBHID))
 
-#if (defined(WIN32NATIVE) && defined(HAVE_LIBHID))
+#if (defined(WIN32) && defined(HAVE_LIBHID))
+#define WIN32_LEAN_AND_MEAN
 #include <windows.h>
-#if defined(HAVE_DDK_HIDSDI_H)
-#  include <ddk/hidsdi.h>
-#else
-#  include "my_ddk_hidsdi.h"
-#endif
+#include <hidsdi.h>
 #include <setupapi.h>
 #else
 #if defined(HAVE_USB_H)
@@ -91,10 +88,9 @@
 
 #define SPI_MAX_CHUNK (64 - 10)    // max packet size less the command overhead
 
-// win32native only:
-#if (defined(WIN32NATIVE) && defined(HAVE_LIBHID))
+#if (defined(WIN32) && defined(HAVE_LIBHID))
 static HANDLE open_hid(unsigned short vid, unsigned short pid);
-const char *usb_strerror()
+static const char *usb_strerror()
 {
     return "";
 }
@@ -106,7 +102,7 @@ static int usb_open_device(struct usb_dev_handle **dev, int vid, int pid);
 #define USB_ERROR_NOTFOUND  2
 #define USB_ERROR_BUSY      16
 #define USB_ERROR_IO        5
-#endif  // WIN32NATIVE
+#endif  // WIN32
 
 static int pickit2_write_report(PROGRAMMER *pgm, const unsigned char report[65]);
 static int pickit2_read_report(PROGRAMMER *pgm, unsigned char report[65]);
@@ -120,7 +116,7 @@ static int pickit2_read_report(PROGRAMMER *pgm, unsigned char report[65]);
  */
 struct pdata
 {
-#if (defined(WIN32NATIVE) && defined(HAVE_LIBHID))
+#if (defined(WIN32) && defined(HAVE_LIBHID))
     HANDLE usb_handle, write_event, read_event;
 #else
     struct usb_dev_handle *usb_handle;     // LIBUSB STUFF
@@ -185,7 +181,7 @@ static void pickit2_teardown(PROGRAMMER * pgm)
 
 static int pickit2_open(PROGRAMMER * pgm, char * port)
 {
-#if (defined(WIN32NATIVE) && defined(HAVE_LIBHID))
+#if (defined(WIN32) && defined(HAVE_LIBHID))
     PDATA(pgm)->usb_handle = open_hid(PICKIT2_VID, PICKIT2_PID);
 
     if (PDATA(pgm)->usb_handle == INVALID_HANDLE_VALUE)
@@ -233,13 +229,13 @@ static int pickit2_open(PROGRAMMER * pgm, char * port)
 
 static void pickit2_close(PROGRAMMER * pgm)
 {
-#if (defined(WIN32NATIVE) && defined(HAVE_LIBHID))
+#if (defined(WIN32) && defined(HAVE_LIBHID))
     CloseHandle(PDATA(pgm)->usb_handle);
     CloseHandle(PDATA(pgm)->read_event);
     CloseHandle(PDATA(pgm)->write_event);
 #else
     usb_close(PDATA(pgm)->usb_handle);
-#endif  // WIN32NATIVE
+#endif  // WIN32
 }
 
 
@@ -814,7 +810,7 @@ static int pickit2_spi(struct programmer_t * pgm, const unsigned char *cmd,
     return n_bytes;
 }
 
-#if (defined(WIN32NATIVE) && defined(HAVE_LIBHID))
+#if (defined(WIN32) && defined(HAVE_LIBHID))
 /*
     Func: open_hid()
     Desc: finds & opens device having specified VID & PID.
@@ -1124,7 +1120,7 @@ static int pickit2_read_report(PROGRAMMER * pgm, unsigned char report[65])
     return usb_read_interrupt(pgm, report, 65, PDATA(pgm)->transaction_timeout);
 }
 
-#else   // WIN32NATIVE
+#else   // WIN32
 /* taken (modified) from avrdude usbasp.c */
 static int usb_open_device(struct usb_dev_handle **device, int vendor, int product)
 {
@@ -1188,7 +1184,7 @@ static int usb_open_device(struct usb_dev_handle **device, int vendor, int produ
 static int pickit2_write_report(PROGRAMMER * pgm, const unsigned char report[65])
 {
     // endpoint 1 OUT??
-    return usb_interrupt_write(PDATA(pgm)->usb_handle, USB_ENDPOINT_OUT | 1, (const char*)(report+1), 64, PDATA(pgm)->transaction_timeout);
+    return usb_interrupt_write(PDATA(pgm)->usb_handle, USB_ENDPOINT_OUT | 1, (char*)(report+1), 64, PDATA(pgm)->transaction_timeout);
 }
 
 static int pickit2_read_report(PROGRAMMER * pgm, unsigned char report[65])
@@ -1196,7 +1192,7 @@ static int pickit2_read_report(PROGRAMMER * pgm, unsigned char report[65])
     // endpoint 1 IN??
     return usb_interrupt_read(PDATA(pgm)->usb_handle, USB_ENDPOINT_IN | 1, (char*)(report+1), 64, PDATA(pgm)->transaction_timeout);
 }
-#endif  // WIN323NATIVE
+#endif  // WIN32
 
 static int  pickit2_parseextparams(struct programmer_t * pgm, LISTID extparms)
 {
@@ -1314,7 +1310,7 @@ void pickit2_initpgm (PROGRAMMER * pgm)
 #else
 static int pickit2_nousb_open (struct programmer_t *pgm, char * name) {
     avrdude_message(MSG_INFO, 
-#ifdef WIN32NATIVE
+#ifdef WIN32
             "%s: error: no usb or hid support. Please compile again with libusb or HID support from Win32 DDK installed.\n",
 #else
             "%s: error: no usb support. Please compile again with libusb installed.\n",
@@ -1336,7 +1332,7 @@ void pickit2_initpgm (PROGRAMMER * pgm)
     strncpy(pgm->type, "pickit2", sizeof(pgm->type));
 }
 
-#endif /* defined(HAVE_LIBUSB) || (defined(WIN32NATIVE) && defined(HAVE_LIBHID)) */
+#endif /* defined(HAVE_LIBUSB) || (defined(WIN32) && defined(HAVE_LIBHID)) */
 
 const char pickit2_desc[] = "Microchip's PICkit2 Programmer";
 
diff --git a/src/ppi.c b/src/ppi.c
index 2706b850..4478115f 100644
--- a/src/ppi.c
+++ b/src/ppi.c
@@ -19,7 +19,7 @@
 /* $Id$ */
 
 
-#if !defined(WIN32NATIVE)
+#if !defined(WIN32)
 
 #include "ac_cfg.h"
 
@@ -233,4 +233,4 @@ void ppi_close(union filedescriptor *fdp)
 
 #endif /* HAVE_PARPORT */
 
-#endif /* !WIN32NATIVE */
+#endif /* !WIN32 */
diff --git a/src/ppiwin.c b/src/ppiwin.c
index bedbaf92..71ec0a9f 100644
--- a/src/ppiwin.c
+++ b/src/ppiwin.c
@@ -32,8 +32,9 @@ reg = register as defined in an enum in ppi.h. This must be converted
 
 #include "ac_cfg.h"
 
-#if defined (WIN32NATIVE)
+#if defined(HAVE_PARPORT) && defined(WIN32)
 
+#define WIN32_LEAN_AND_MEAN
 #include <errno.h>
 #include <fcntl.h>
 #include <stdio.h>
@@ -336,82 +337,4 @@ static void outb(unsigned char value, unsigned short port)
     return;
 }
 
-#if !defined(HAVE_GETTIMEOFDAY)
-struct timezone;
-int gettimeofday(struct timeval *tv, struct timezone *unused){
-// i've found only ms resolution, avrdude expects us
-
-	SYSTEMTIME st;
-	GetSystemTime(&st);
-  
-	tv->tv_sec=(long)(st.wSecond+st.wMinute*60+st.wHour*3600);
-	tv->tv_usec=(long)(st.wMilliseconds*1000);
-
-	return 0;
-}
-#endif /* HAVE_GETTIMEOFDAY */
-
-// #define W32USLEEPDBG
-
-#ifdef W32USLEEPDBG
-
-#  define DEBUG_QueryPerformanceCounter(arg) QueryPerformanceCounter(arg)
-#  define DEBUG_DisplayTimingInfo(start, stop, freq, us, has_highperf)     \
-     do {                                                                  \
-       unsigned long dt;                                                   \
-       dt = (unsigned long)((stop.QuadPart - start.QuadPart) * 1000 * 1000 \
-                            / freq.QuadPart);                              \
-       avrdude_message(MSG_INFO, \
-               "hpt:%i usleep usec:%lu sleep msec:%lu timed usec:%lu\n",   \
-               has_highperf, us, ((us + 999) / 1000), dt);                 \
-     } while (0)
-
-#else
-
-#  define DEBUG_QueryPerformanceCounter(arg)
-#  define DEBUG_DisplayTimingInfo(start, stop, freq, us, has_highperf)
-
 #endif
-
-#if !defined(HAVE_USLEEP)
-int usleep(unsigned int us)
-{
-	int has_highperf;
-	LARGE_INTEGER freq,start,stop,loopend;
-
-	// workaround: although usleep is very precise if using
-	// high-performance-timers there are sometimes problems with
-	// verify - increasing the delay helps sometimes but not
-	// realiably. There must be some other problem. Maybe just
-	// with my test-hardware maybe in the code-base.
-	//// us=(unsigned long) (us*1.5);
-
-	has_highperf=QueryPerformanceFrequency(&freq);
-
-	//has_highperf=0; // debug
-
-	if (has_highperf) {
-		QueryPerformanceCounter(&start);
-		loopend.QuadPart=start.QuadPart+freq.QuadPart*us/(1000*1000);
-		do {
-			QueryPerformanceCounter(&stop);
-		} while (stop.QuadPart<=loopend.QuadPart);
-	}
-	else {
-		DEBUG_QueryPerformanceCounter(&start);
-
-		Sleep(1);
-		Sleep( (DWORD)((us+999)/1000) );
-
-		DEBUG_QueryPerformanceCounter(&stop);
-	}
-
-    DEBUG_DisplayTimingInfo(start, stop, freq, us, has_highperf);
-
-    return 0;
-}
-#endif  /* !HAVE_USLEEP */
-
-#endif
-
-
diff --git a/src/ser_avrdoper.c b/src/ser_avrdoper.c
index 8eae2c3f..2e90f0eb 100644
--- a/src/ser_avrdoper.c
+++ b/src/ser_avrdoper.c
@@ -26,7 +26,7 @@
 
 #include "ac_cfg.h"
 
-#if defined(HAVE_LIBHIDAPI) || (defined(WIN32NATIVE) && defined(HAVE_LIBHID))
+#if defined(HAVE_LIBHIDAPI) || (defined(WIN32) && defined(HAVE_LIBHID))
 
 #include <stdio.h>
 #include <string.h>
@@ -161,15 +161,11 @@ static int usbGetReport(union filedescriptor *fdp, int reportType, int reportNum
 /* ------------------------------------------------------------------------ */
 
 
+#define WIN32_LEAN_AND_MEAN
 #include <windows.h>
 #include <setupapi.h>
-
-#if defined(HAVE_DDK_HIDSDI_H)
-#  include <ddk/hidsdi.h>
-#else
-#  include "my_ddk_hidsdi.h"
-#endif
-#include <ddk/hidpi.h>
+#include <hidsdi.h>
+#include <hidpi.h>
 
 #ifdef USB_DEBUG
 #define DEBUG_PRINT(arg)    printf arg
@@ -332,7 +328,7 @@ static int usbGetReport(union filedescriptor *fdp, int reportType, int reportNum
     return rval == 0 ? USB_ERROR_IO : 0;
 }
 
-#endif  /* WIN32NATIVE */
+#endif  /* WIN32 */
 
 /* ------------------------------------------------------------------------ */
 /* ------------------------------------------------------------------------ */
@@ -555,4 +551,4 @@ struct serial_device avrdoper_serdev =
   .flags = SERDEV_FL_NONE,
 };
 
-#endif /* defined(HAVE_LIBHIDAPI) || (defined(WIN32NATIVE) && defined(HAVE_LIBHID)) */
+#endif /* defined(HAVE_LIBHIDAPI) || (defined(WIN32) && defined(HAVE_LIBHID)) */
diff --git a/src/ser_posix.c b/src/ser_posix.c
index 3d8e15a1..96d665f0 100644
--- a/src/ser_posix.c
+++ b/src/ser_posix.c
@@ -23,7 +23,7 @@
  * Posix serial interface for avrdude.
  */
 
-#if !defined(WIN32NATIVE)
+#if !defined(WIN32)
 
 #include "ac_cfg.h"
 
@@ -174,7 +174,6 @@ static int ser_setparams(union filedescriptor *fd, long baud, unsigned long cfla
 static int
 net_open(const char *port, union filedescriptor *fdp)
 {
-#ifdef HAVE_GETADDRINFO
   char *hp, *hstr, *pstr;
   int s, fd, ret = -1;
   struct addrinfo hints;
@@ -247,12 +246,6 @@ net_open(const char *port, union filedescriptor *fdp)
 error:
   free(hp);
   return ret;
-#else
-  avrdude_message(MSG_INFO,
-	  "%s: Networking is not supported on your platform.\n"
-	  "If you need it, please open a bug report.\n", progname);
-  return -1;
-#endif /* HAVE_GETADDRINFO */
 }
 
 
@@ -526,4 +519,4 @@ struct serial_device serial_serdev =
 
 struct serial_device *serdev = &serial_serdev;
 
-#endif  /* WIN32NATIVE */
+#endif  /* WIN32 */
diff --git a/src/ser_win32.c b/src/ser_win32.c
index 25412cf0..fa4d7aba 100644
--- a/src/ser_win32.c
+++ b/src/ser_win32.c
@@ -17,22 +17,18 @@
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 
-/* $Id$ */
-
 /*
  * Native Win32 serial interface for avrdude.
  */
 
 #include "ac_cfg.h"
 
-#if defined(WIN32NATIVE)
-
-#ifdef HAVE_LIBWS2_32
-/* winsock2.h must be included before windows.h from avrdude.h... */
-#  include <winsock2.h>
-#endif
+#if defined(WIN32)
 
+#define WIN32_LEAN_AND_MEAN
 #include <windows.h>
+#include <winsock2.h>
+#include <stdlib.h>
 #include <stdio.h>
 #include <ctype.h>   /* for isprint */
 #include <errno.h>   /* ENOTTY */
@@ -154,7 +150,6 @@ static int ser_setparams(union filedescriptor *fd, long baud, unsigned long cfla
 	}
 }
 
-#ifdef HAVE_LIBWS2_32
 static int
 net_open(const char *port, union filedescriptor *fdp)
 {
@@ -246,7 +241,6 @@ net_open(const char *port, union filedescriptor *fdp)
 	serial_over_ethernet = 1;
 	return 0;
 }
-#endif
 
 
 static int ser_open(char * port, union pinfo pinfo, union filedescriptor *fdp)
@@ -260,14 +254,7 @@ static int ser_open(char * port, union pinfo pinfo, union filedescriptor *fdp)
 	 * handle it as a TCP connection to a terminal server.
 	 */
 	if (strncmp(port, "net:", strlen("net:")) == 0) {
-#ifdef HAVE_LIBWS2_32
 		return net_open(port + strlen("net:"), fdp);
-#else
-		avrdude_message(MSG_INFO, "%s: ser_open(): "
-				"not configured for TCP connections\n",
-                                progname);
-		return -1;
-#endif
 	}
 
 	if (strncasecmp(port, "com", strlen("com")) == 0) {
@@ -370,7 +357,6 @@ static int ser_set_dtr_rts(union filedescriptor *fd, int is_on)
 	}
 }
 
-#ifdef HAVE_LIBWS2_32
 static int net_send(union filedescriptor *fd, const unsigned char * buf, size_t buflen)
 {
 	LPVOID lpMsgBuf;
@@ -429,16 +415,13 @@ static int net_send(union filedescriptor *fd, const unsigned char * buf, size_t
 
 	return 0;
 }
-#endif
 
 
 static int ser_send(union filedescriptor *fd, const unsigned char * buf, size_t buflen)
 {
-#ifdef HAVE_LIBWS2_32
 	if (serial_over_ethernet) {
 		return net_send(fd, buf, buflen);
 	}
-#endif
 
 	size_t len = buflen;
 	unsigned char c='\0';
@@ -493,7 +476,6 @@ static int ser_send(union filedescriptor *fd, const unsigned char * buf, size_t
 }
 
 
-#ifdef HAVE_LIBWS2_32
 static int net_recv(union filedescriptor *fd, unsigned char * buf, size_t buflen)
 {
 	LPVOID lpMsgBuf;
@@ -587,15 +569,12 @@ reselect:
 
 	return 0;
 }
-#endif
 
 static int ser_recv(union filedescriptor *fd, unsigned char * buf, size_t buflen)
 {
-#ifdef HAVE_LIBWS2_32
 	if (serial_over_ethernet) {
 		return net_recv(fd, buf, buflen);
 	}
-#endif
 
 	unsigned char c;
 	unsigned char * p = buf;
@@ -660,7 +639,6 @@ static int ser_recv(union filedescriptor *fd, unsigned char * buf, size_t buflen
   return 0;
 }
 
-#ifdef HAVE_LIBWS2_32
 static int net_drain(union filedescriptor *fd, int display)
 {
 	LPVOID lpMsgBuf;
@@ -739,15 +717,12 @@ static int net_drain(union filedescriptor *fd, int display)
 
 	return 0;
 }
-#endif
 
 static int ser_drain(union filedescriptor *fd, int display)
 {
-#ifdef HAVE_LIBWS2_32
 	if (serial_over_ethernet) {
 		return net_drain(fd, display);
 	}
-#endif
 
 	// int rc;
 	unsigned char buf[10];
@@ -813,4 +788,4 @@ struct serial_device serial_serdev =
 
 struct serial_device *serdev = &serial_serdev;
 
-#endif /* WIN32NATIVE */
+#endif /* WIN32 */
diff --git a/src/serbb_posix.c b/src/serbb_posix.c
index a7dd0997..9f10dccf 100644
--- a/src/serbb_posix.c
+++ b/src/serbb_posix.c
@@ -23,7 +23,7 @@
  * Posix serial bitbanging interface for avrdude.
  */
 
-#if !defined(WIN32NATIVE)
+#if !defined(WIN32)
 
 #include "ac_cfg.h"
 
@@ -318,4 +318,4 @@ void serbb_initpgm(PROGRAMMER *pgm)
   pgm->write_byte     = avr_write_byte_default;
 }
 
-#endif  /* WIN32NATIVE */
+#endif  /* WIN32 */
diff --git a/src/serbb_win32.c b/src/serbb_win32.c
index 0e889745..9a58be10 100644
--- a/src/serbb_win32.c
+++ b/src/serbb_win32.c
@@ -25,11 +25,12 @@
 
 #include "avrdude.h"
 
-#if defined(WIN32NATIVE)
+#if defined(WIN32)
 
 
 #include "ac_cfg.h"
 
+#define WIN32_LEAN_AND_MEAN
 #include <windows.h>
 #include <stdio.h>
 
@@ -308,8 +309,8 @@ static int serbb_open(PROGRAMMER *pgm, char *port)
                         progname, port);
                 return -1;
 	}
-        avrdude_message(MSG_DEBUG, "%s: ser_open(): opened comm port \"%s\", handle 0x%x\n",
-                        progname, port, (int)hComPort);
+        avrdude_message(MSG_DEBUG, "%s: ser_open(): opened comm port \"%s\", handle 0x%zx\n",
+                        progname, port, (INT_PTR)hComPort);
 
         pgm->fd.pfd = (void *)hComPort;
 
@@ -326,8 +327,8 @@ static void serbb_close(PROGRAMMER *pgm)
 		pgm->setpin(pgm, PIN_AVR_RESET, 1);
 		CloseHandle (hComPort);
 	}
-        avrdude_message(MSG_DEBUG, "%s: ser_close(): closed comm port handle 0x%x\n",
-                                progname, (int)hComPort);
+        avrdude_message(MSG_DEBUG, "%s: ser_close(): closed comm port handle 0x%zx\n",
+                                progname, (INT_PTR)hComPort);
 
 	hComPort = INVALID_HANDLE_VALUE;
 }
@@ -363,4 +364,4 @@ void serbb_initpgm(PROGRAMMER *pgm)
   pgm->write_byte     = avr_write_byte_default;
 }
 
-#endif  /* WIN32NATIVE */
+#endif  /* WIN32 */
diff --git a/src/stk500.c b/src/stk500.c
index 88944afc..ea87b899 100644
--- a/src/stk500.c
+++ b/src/stk500.c
@@ -760,7 +760,7 @@ static int stk500_paged_write(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
                               unsigned int page_size,
                               unsigned int addr, unsigned int n_bytes)
 {
-  unsigned char buf[page_size + 16];
+  unsigned char* buf = alloca(page_size + 16);
   int memtype;
   int a_div;
   int block_size;
diff --git a/src/stk500v2.c b/src/stk500v2.c
index f6c5b1ca..11aa9a94 100644
--- a/src/stk500v2.c
+++ b/src/stk500v2.c
@@ -1613,7 +1613,7 @@ static int stk500v2_open(PROGRAMMER * pgm, char * port)
   PDATA(pgm)->pgmtype = PGMTYPE_UNKNOWN;
 
   if(strcasecmp(port, "avrdoper") == 0){
-#if defined(HAVE_LIBHIDAPI) || (defined(WIN32NATIVE) && defined(HAVE_LIBHID))
+#if defined(HAVE_LIBHIDAPI) || (defined(WIN32) && defined(HAVE_LIBHID))
     serdev = &avrdoper_serdev;
     PDATA(pgm)->pgmtype = PGMTYPE_STK500;
 #else
diff --git a/src/term.c b/src/term.c
index 11acb59d..96bf2bce 100644
--- a/src/term.c
+++ b/src/term.c
@@ -27,11 +27,9 @@
 #include <limits.h>
 
 #if defined(HAVE_LIBREADLINE)
-#if !defined(WIN32NATIVE)
 #  include <readline/readline.h>
 #  include <readline/history.h>
 #endif
-#endif
 
 #include "avrdude.h"
 #include "term.h"
@@ -919,7 +917,7 @@ static int do_cmd(PROGRAMMER * pgm, struct avrpart * p,
 
 char * terminal_get_input(const char *prompt)
 {
-#if defined(HAVE_LIBREADLINE) && !defined(WIN32NATIVE)
+#if defined(HAVE_LIBREADLINE) && !defined(WIN32)
   char *input;
   input = readline(prompt);
   if ((input != NULL) && (strlen(input) >= 1))
diff --git a/src/updi_link.c b/src/updi_link.c
index b1af2b87..157c81b2 100644
--- a/src/updi_link.c
+++ b/src/updi_link.c
@@ -39,14 +39,9 @@
 #include "updi_constants.h"
 #include "updi_state.h"
 
-#include <sys/time.h>
-
-void msleep(int tms)
+static void msleep(int tms)
 {
-    struct timeval tv;
-    tv.tv_sec  = tms / 1000;
-    tv.tv_usec = (tms % 1000) * 1000;
-    select (0, NULL, NULL, NULL, &tv);
+    usleep(tms * 1000);
 }
 
 static int updi_physical_open(PROGRAMMER* pgm, int baudrate, unsigned long cflags)
diff --git a/src/usb_hidapi.c b/src/usb_hidapi.c
index 81e9c4ab..d23c628e 100644
--- a/src/usb_hidapi.c
+++ b/src/usb_hidapi.c
@@ -42,11 +42,6 @@
 
 #include "usbdevs.h"
 
-#if defined(WIN32NATIVE)
-/* someone has defined "interface" to "struct" in Cygwin */
-#  undef interface
-#endif
-
 /*
  * The "baud" parameter is meaningless for USB devices, so we reuse it
  * to pass the desired USB device ID.
diff --git a/src/usb_libusb.c b/src/usb_libusb.c
index 235e330a..0d9ad440 100644
--- a/src/usb_libusb.c
+++ b/src/usb_libusb.c
@@ -48,7 +48,7 @@
 
 #include "usbdevs.h"
 
-#if defined(WIN32NATIVE)
+#if defined(WIN32)
 /* someone has defined "interface" to "struct" in Cygwin */
 #  undef interface
 #endif
diff --git a/src/usbtiny.c b/src/usbtiny.c
index 7754b757..4c6fefcf 100644
--- a/src/usbtiny.c
+++ b/src/usbtiny.c
@@ -52,13 +52,7 @@
 #define TPIPCR_GT_0b	0x07
 #define TPI_STOP_BITS	0x03
 
-#ifdef HAVE_NETINET_IN_H
-#  include <netinet/in.h>
-#  define LITTLE_TO_BIG_16(x) (htons(x))
-#else
-// WIN32
-#  define LITTLE_TO_BIG_16(x) ((((x) << 8) & 0xFF00) | (((x) >> 8) & 0x00FF))
-#endif
+#define LITTLE_TO_BIG_16(x) ((((x) << 8) & 0xFF00) | (((x) >> 8) & 0x00FF))
 
 #ifndef HAVE_UINT_T
 typedef	unsigned int	uint_t;