14 files changed, 1647 insertions, 0 deletions
diff --git a/src/GvimExt/GvimExt.reg b/src/GvimExt/GvimExt.reg
new file mode 100644
index 0000000..d9ebff8
--- /dev/null
+++ b/src/GvimExt/GvimExt.reg
@@ -0,0 +1,20 @@
+REGEDIT4
+
+[HKEY_CLASSES_ROOT\CLSID\{51EEE242-AD87-11d3-9C1E-0090278BBD99}]
+   @="Vim Shell Extension"
+[HKEY_CLASSES_ROOT\CLSID\{51EEE242-AD87-11d3-9C1E-0090278BBD99}\InProcServer32]
+   @="gvimext.dll"
+   "ThreadingModel"="Apartment"
+
+[HKEY_CLASSES_ROOT\*\shellex\ContextMenuHandlers\gvim]
+   @="{51EEE242-AD87-11d3-9C1E-0090278BBD99}"
+
+[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions\Approved]
+   "{51EEE242-AD87-11d3-9C1E-0090278BBD99}"="Vim Shell Extension"
+
+[HKEY_LOCAL_MACHINE\Software\Vim\Gvim]
+   "path"="gvim.exe"
+
+[HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Uninstall\Vim 9.0]
+   "DisplayName"="Vim 9.0: Edit with Vim popup menu entry"
+   "UninstallString"="uninstall.exe"
diff --git a/src/GvimExt/Make_ming.mak b/src/GvimExt/Make_ming.mak
new file mode 100644
index 0000000..0ebe08a
--- /dev/null
+++ b/src/GvimExt/Make_ming.mak
@@ -0,0 +1,83 @@
+# Project: gvimext
+# Generates gvimext.dll with gcc.
+# To be used with MingW and Cygwin.
+#
+# Originally, the DLL base address was fixed: -Wl,--image-base=0x1C000000
+# Now it is allocated dynamically by the linker by evaluating all DLLs
+# already loaded in memory. The binary image contains as well information
+# for automatic pseudo-rebasing, if needed by the system. ALV 2004-02-29
+
+# If cross-compiling set this to yes, else set it to no
+CROSS = no
+#CROSS = yes
+# For the old MinGW 2.95 (the one you get e.g. with debian woody)
+# set the following variable to yes and check if the executables are
+# really named that way.
+# If you have a newer MinGW or you are using cygwin set it to no and
+# check also the executables
+MINGWOLD = no
+
+# Link against the shared versions of libgcc/libstdc++ by default.  Set
+# STATIC_STDCPLUS to "yes" to link against static versions instead.
+STATIC_STDCPLUS=no
+#STATIC_STDCPLUS=yes
+
+# Note: -static-libstdc++ is not available until gcc 4.5.x.
+LDFLAGS += -shared
+ifeq (yes, $(STATIC_STDCPLUS))
+LDFLAGS += -static-libgcc -static-libstdc++
+endif
+
+ifeq ($(CROSS),yes)
+DEL = rm
+ifeq ($(MINGWOLD),yes)
+CXXFLAGS := -O2 -fvtable-thunks
+else
+CXXFLAGS := -O2
+endif
+else
+CXXFLAGS := -O2
+ifneq (sh.exe, $(SHELL))
+DEL = rm
+else
+DEL = del
+endif
+endif
+# Set the default $(WINVER) to make it work with WinXP.
+ifndef WINVER
+WINVER = 0x0501
+endif
+CXX := $(CROSS_COMPILE)g++
+WINDRES := $(CROSS_COMPILE)windres
+# this used to have --preprocessor, but it's no longer supported
+WINDRES_FLAGS =
+LIBS :=  -luuid -lgdi32
+RES  := gvimext.res
+ifeq ($(findstring clang++,$(CXX)),)
+DEFFILE = gvimext_ming.def
+endif
+OBJ  := gvimext.o
+
+DLL  := gvimext.dll
+
+.PHONY: all all-before all-after clean clean-custom
+
+all: all-before $(DLL) all-after
+
+$(DLL): $(OBJ) $(RES) $(DEFFILE)
+	$(CXX) $(LDFLAGS) $(CXXFLAGS) -s -o $@ \
+		-Wl,--enable-auto-image-base \
+		-Wl,--enable-auto-import \
+		-Wl,--whole-archive \
+			$^ \
+		-Wl,--no-whole-archive \
+			$(LIBS)
+
+gvimext.o: gvimext.cpp
+	$(CXX) $(CXXFLAGS) -DFEAT_GETTEXT -DWINVER=$(WINVER) -D_WIN32_WINNT=$(WINVER) -c $? -o $@
+
+$(RES): gvimext_ming.rc
+	$(WINDRES) $(WINDRES_FLAGS) --input-format=rc --output-format=coff -DMING $? -o $@
+
+clean: clean-custom
+	-$(DEL)  $(OBJ) $(RES) $(DLL)
diff --git a/src/GvimExt/Make_mvc.mak b/src/GvimExt/Make_mvc.mak
new file mode 100644
index 0000000..4b83f52
--- /dev/null
+++ b/src/GvimExt/Make_mvc.mak
@@ -0,0 +1,98 @@
+# Makefile for GvimExt, using MSVC
+# Options:
+#   DEBUG=yes		Build debug version (for VC7 and maybe later)
+#   CPUARG=		/arch:IA32/AVX/etc, call from main makefile to set
+#   			automatically from CPUNR
+#
+
+TARGETOS = WINNT
+
+!ifndef APPVER
+APPVER = 5.01
+!endif
+!ifndef WINVER
+WINVER = 0x0501
+!endif
+
+!if "$(DEBUG)" != "yes"
+NODEBUG = 1
+!endif
+
+!ifdef PROCESSOR_ARCHITECTURE
+# On Windows NT
+! ifndef CPU
+CPU = i386
+!  if !defined(PLATFORM) && defined(TARGET_CPU)
+PLATFORM = $(TARGET_CPU)
+!  endif
+!  ifdef PLATFORM
+!   if ("$(PLATFORM)" == "x64") || ("$(PLATFORM)" == "X64")
+CPU = AMD64
+!   elseif ("$(PLATFORM)" == "arm64") || ("$(PLATFORM)" == "ARM64")
+CPU = ARM64
+!   elseif ("$(PLATFORM)" != "x86") && ("$(PLATFORM)" != "X86")
+!    error *** ERROR Unknown target platform "$(PLATFORM)". Make aborted.
+!   endif
+!  endif
+! endif
+!else
+CPU = i386
+!endif
+
+!ifdef SDK_INCLUDE_DIR
+!include $(SDK_INCLUDE_DIR)\Win32.mak
+!elseif "$(USE_WIN32MAK)"=="yes"
+!include <Win32.mak>
+!else
+cc = cl
+link = link
+rc = rc
+cflags = -nologo -c
+lflags = -incremental:no -nologo
+rcflags = /r
+olelibsdll = ole32.lib uuid.lib oleaut32.lib user32.lib gdi32.lib advapi32.lib
+!endif
+
+# include CPUARG
+cflags = $(cflags) $(CPUARG)
+
+# set WINVER and _WIN32_WINNT
+cflags = $(cflags) -DWINVER=$(WINVER) -D_WIN32_WINNT=$(WINVER)
+
+!if "$(CL)" == "/D_USING_V110_SDK71_"
+rcflags = $(rcflags) /D_USING_V110_SDK71_
+!endif
+
+SUBSYSTEM = console
+!if "$(SUBSYSTEM_VER)" != ""
+SUBSYSTEM = $(SUBSYSTEM),$(SUBSYSTEM_VER)
+!endif
+
+!if "$(CPU)" == "AMD64" || "$(CPU)" == "ARM64"
+OFFSET = 0x11C000000
+!else
+OFFSET = 0x1C000000
+!endif
+
+all: gvimext.dll
+
+gvimext.dll:    gvimext.obj	\
+		gvimext.res
+	$(link) $(lflags) -dll -def:gvimext.def -base:$(OFFSET) -out:$*.dll $** $(olelibsdll) shell32.lib comctl32.lib -subsystem:$(SUBSYSTEM)
+	if exist $*.dll.manifest mt -nologo -manifest $*.dll.manifest -outputresource:$*.dll;2
+
+gvimext.obj: gvimext.h
+
+.cpp.obj:
+	$(cc) $(cflags) -DFEAT_GETTEXT $(cvarsmt) $*.cpp
+
+gvimext.res: gvimext.rc
+	$(rc) /nologo $(rcflags) $(rcvars)  gvimext.rc
+
+clean:
+	- if exist gvimext.dll del gvimext.dll
+	- if exist gvimext.lib del gvimext.lib
+	- if exist gvimext.exp del gvimext.exp
+	- if exist gvimext.obj del gvimext.obj
+	- if exist gvimext.res del gvimext.res
+	- if exist gvimext.dll.manifest del gvimext.dll.manifest
diff --git a/src/GvimExt/Makefile b/src/GvimExt/Makefile
new file mode 100644
index 0000000..18b91ec
--- /dev/null
+++ b/src/GvimExt/Makefile
@@ -0,0 +1,4 @@
+!message This makefile is deprecated. Use Make_mvc.mak instead.
+!message
+
+!include Make_mvc.mak
diff --git a/src/GvimExt/README.txt b/src/GvimExt/README.txt
new file mode 100644
index 0000000..a29200e
--- /dev/null
+++ b/src/GvimExt/README.txt
@@ -0,0 +1,94 @@
+README.txt for the gvimext DLL.
+
+Written by Tianmiao Hu.  Edited by Bram Moolenaar.
+
+
+INSTALLATION
+
+To install the "Edit with Vim" popup menu entry, it is recommended to use the
+"install.exe" program.  It will ask you a few questions and install the needed
+registry entries.
+
+In special situations you might want to make changes by hand.  Check these
+items:
+- The gvimext.dll, gvim.exe and uninstall.exe either need to be in the search
+  path, or you have to set the full path in the registry entries.  You could
+  move the gvimext.dll to the "windows\system" or "windows\system32"
+  directory, where the other DLL files are.
+- You can find the names of the used registry entries in the file
+  "GvimExt.reg".  You can edit this file to add the paths.  To install the
+  registry entries, right-click the gvimext.reg file and choose the "merge"
+  menu option.
+- The registry key [HKEY_LOCAL_MACHINE\Software\Vim\Gvim] is used by the
+  gvimext.dll.  The value "path" specifies the location of "gvim.exe".  If
+  gvim.exe is in the search path, the path can be omitted.  The value "lang"
+  can be used to set the language, for example "de" for German.  If "lang" is
+  omitted, the language set for Windows will be used.
+
+It is the preferred method to keep gvim.exe with the runtime files, so that
+Vim will find them (also the translated menu items are there).
+
+
+UNINSTALLATION
+
+To uninstall the "Edit with Vim" popup menu entry, it is recommended to use
+the "uninstal.exe" program.
+
+In special situations you might want to uninstall by hand:
+- Open the registry by running regedit.exe.
+- Delete all the keys listed in GvimExt.reg, except this one:
+  [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions\Approved]
+  For this key, only delete one value:
+  "{51EEE242-AD87-11d3-9C1E-0090278BBD99}"="Vim Shell Extension"
+- Delete the gvimext.dll, if you want.  You might need to reboot the machine
+  in order to remove this file.  A quick way is to log off and re-login.
+
+Another method is by using the uninst.bat script:
+    uninst gvimext.inf
+This batch file will remove all the registry keys from the system.  Then you
+can remove the gvimext.dll file.
+Note: In order for this batch file to work, you must have two system files:
+rundll32.exe and setupapi.dll.  I believe you will have rundll32.exe in your
+system.  I know windows nt 4.0 with the service pack 4 has setupapi.dll.  My
+windows 95 has setupapi.dll.  I find that the internet explorer 4.0 comes with
+the setupapi.dll in file Ie4_5.cab.
+
+If you do encounter problems running this script, then probably you need to
+modify the uninst.bat to suit to your system.  Basically, you must find out
+where are the locations for your rundll32.exe and setupapi.dll files.  In
+windows nt, both files are under c:\winnt\system32 directory. In my windows 95
+system, I got setupapi.dll at c:\windows\system and rundll32.exe at
+c:\windows.  So you might want to try something like:
+    rundll32.exe c:\windows\system\setupapi.dll,InstallHinfSection DefaultUninstall 128 %1
+where %1 can be substituted by gvimext.inf
+
+
+THE SOURCE CODE
+
+I have provided the source code here in hope that gvim users around world can
+further enhance this little dll.  I believe the only thing you need to change
+is gvimext.cpp file.  The important two functions you need to look at are
+QueryContextMenu and InvokeCommand.  You can modify right-click menus in the
+QueryContextMenu function and invoke gvim in the InvokeCommand function.  Note
+the selected files can be accessed from the DragQueryFile function.  I am not
+familiar with the invoking options for gvim.  I believe there are some
+improvements that can be made on that side.
+
+I use MS Visual C++ 6.0's nmake to make the gvimext.dll.  I don't have a
+chance to try earlier versions of MSVC.  The files that are required for build
+are:
+	gvimext.cpp
+	gvimext.h
+	gvimext.def
+	gvimext.rc
+	resource.h
+	Makefile
+
+To compile the DLL from the command line:
+	vcvars32
+	nmake -f Makefile
+
+If you did something interesting to this dll, please let me know
+@ tianmiao@acm.org.
+
+Happy vimming!!!
diff --git a/src/GvimExt/gvimext.cpp b/src/GvimExt/gvimext.cpp
new file mode 100644
index 0000000..dd26eb1
--- /dev/null
+++ b/src/GvimExt/gvimext.cpp
@@ -0,0 +1,970 @@
+/* vi:set ts=8 sts=4 sw=4:
+ *
+ * VIM - Vi IMproved	gvimext by Tianmiao Hu
+ *
+ * Do ":help uganda"  in Vim to read copying and usage conditions.
+ * Do ":help credits" in Vim to see a list of people who contributed.
+ */
+
+/*
+ * gvimext is a DLL which is used for the "Edit with Vim" context menu
+ * extension.  It implements a MS defined interface with the Shell.
+ *
+ * If you have any questions or any suggestions concerning gvimext, please
+ * contact Tianmiao Hu: tianmiao@acm.org.
+ */
+
+#include "gvimext.h"
+
+static char *searchpath(char *name);
+
+// Always get an error while putting the following stuff to the
+// gvimext.h file as class protected variables, give up and
+// declare them as global stuff
+FORMATETC fmte = {CF_HDROP,
+		  (DVTARGETDEVICE FAR *)NULL,
+		  DVASPECT_CONTENT,
+		  -1,
+		  TYMED_HGLOBAL
+		 };
+STGMEDIUM medium;
+HRESULT hres = 0;
+UINT cbFiles = 0;
+
+/* The buffers size used to be MAX_PATH (260 bytes), but that's not always
+ * enough */
+#define BUFSIZE 1100
+
+// The "Edit with Vim" shell extension provides these choices when
+// a new instance of Gvim is selected:
+//   - use tabpages
+//   - enable diff mode
+//   - none of the above
+#define EDIT_WITH_VIM_USE_TABPAGES (2)
+#define EDIT_WITH_VIM_IN_DIFF_MODE (1)
+#define EDIT_WITH_VIM_NO_OPTIONS   (0)
+
+//
+// Get the name of the Gvim executable to use, with the path.
+// When "runtime" is non-zero, we were called to find the runtime directory.
+// Returns the path in name[BUFSIZE].  It's empty when it fails.
+//
+    static void
+getGvimName(char *name, int runtime)
+{
+    HKEY	keyhandle;
+    DWORD	hlen;
+
+    // Get the location of gvim from the registry.
+    name[0] = 0;
+    if (RegOpenKeyEx(HKEY_LOCAL_MACHINE, "Software\\Vim\\Gvim", 0,
+				       KEY_READ, &keyhandle) == ERROR_SUCCESS)
+    {
+	hlen = BUFSIZE;
+	if (RegQueryValueEx(keyhandle, "path", 0, NULL, (BYTE *)name, &hlen)
+							     != ERROR_SUCCESS)
+	    name[0] = 0;
+	else
+	    name[hlen] = 0;
+	RegCloseKey(keyhandle);
+    }
+
+    // Registry didn't work, use the search path.
+    if (name[0] == 0)
+	strcpy(name, searchpath((char *)"gvim.exe"));
+
+    if (!runtime)
+    {
+	// Only when looking for the executable, not the runtime dir, we can
+	// search for the batch file or a name without a path.
+	if (name[0] == 0)
+	    strcpy(name, searchpath((char *)"gvim.bat"));
+	if (name[0] == 0)
+	    strcpy(name, "gvim");	// finds gvim.bat or gvim.exe
+    }
+}
+
+    static void
+getGvimInvocation(char *name, int runtime)
+{
+    getGvimName(name, runtime);
+    // avoid that Vim tries to expand wildcards in the file names
+    strcat(name, " --literal");
+}
+
+    static void
+getGvimInvocationW(wchar_t *nameW)
+{
+    char *name;
+
+    name = (char *)malloc(BUFSIZE);
+    getGvimInvocation(name, 0);
+    mbstowcs(nameW, name, BUFSIZE);
+    free(name);
+}
+
+//
+// Get the Vim runtime directory into buf[BUFSIZE].
+// The result is empty when it failed.
+// When it works, the path ends in a slash or backslash.
+//
+    static void
+getRuntimeDir(char *buf)
+{
+    int		idx;
+
+    getGvimName(buf, 1);
+    if (buf[0] != 0)
+    {
+	// When no path found, use the search path to expand it.
+	if (strchr(buf, '/') == NULL && strchr(buf, '\\') == NULL)
+	    strcpy(buf, searchpath(buf));
+
+	// remove "gvim.exe" from the end
+	for (idx = (int)strlen(buf) - 1; idx >= 0; idx--)
+	    if (buf[idx] == '\\' || buf[idx] == '/')
+	    {
+		buf[idx + 1] = 0;
+		break;
+	    }
+    }
+}
+
+HBITMAP IconToBitmap(HICON hIcon, HBRUSH hBackground, int width, int height)
+{
+	HDC hDC = GetDC(NULL);
+	HDC hMemDC = CreateCompatibleDC(hDC);
+	HBITMAP hMemBmp = CreateCompatibleBitmap(hDC, width, height);
+	HBITMAP hResultBmp = NULL;
+	HGDIOBJ hOrgBMP = SelectObject(hMemDC, hMemBmp);
+
+	DrawIconEx(hMemDC, 0, 0, hIcon, width, height, 0, hBackground, DI_NORMAL);
+
+	hResultBmp = hMemBmp;
+	hMemBmp = NULL;
+
+	SelectObject(hMemDC, hOrgBMP);
+	DeleteDC(hMemDC);
+	ReleaseDC(NULL, hDC);
+	DestroyIcon(hIcon);
+	return hResultBmp;
+}
+
+//
+// GETTEXT: translated messages and menu entries
+//
+#ifndef FEAT_GETTEXT
+# define _(x)  x
+#else
+# define _(x)  (*dyn_libintl_gettext)(x)
+# define VIMPACKAGE "vim"
+# ifndef GETTEXT_DLL
+#  define GETTEXT_DLL "libintl.dll"
+#  define GETTEXT_DLL_ALT "libintl-8.dll"
+# endif
+
+// Dummy functions
+static char *null_libintl_gettext(const char *);
+static char *null_libintl_textdomain(const char *);
+static char *null_libintl_bindtextdomain(const char *, const char *);
+static int dyn_libintl_init(char *dir);
+static void dyn_libintl_end(void);
+
+static HINSTANCE hLibintlDLL = 0;
+static char *(*dyn_libintl_gettext)(const char *) = null_libintl_gettext;
+static char *(*dyn_libintl_textdomain)(const char *) = null_libintl_textdomain;
+static char *(*dyn_libintl_bindtextdomain)(const char *, const char *)
+						= null_libintl_bindtextdomain;
+
+//
+// Attempt to load libintl.dll.  If it doesn't work, use dummy functions.
+// "dir" is the directory where the libintl.dll might be.
+// Return 1 for success, 0 for failure.
+//
+    static int
+dyn_libintl_init(char *dir)
+{
+    int		i;
+    static struct
+    {
+	char	    *name;
+	FARPROC	    *ptr;
+    } libintl_entry[] =
+    {
+	{(char *)"gettext",		(FARPROC*)&dyn_libintl_gettext},
+	{(char *)"textdomain",		(FARPROC*)&dyn_libintl_textdomain},
+	{(char *)"bindtextdomain",	(FARPROC*)&dyn_libintl_bindtextdomain},
+	{NULL, NULL}
+    };
+    DWORD	len, len2;
+    LPWSTR	buf = NULL;
+    LPWSTR	buf2 = NULL;
+
+    // No need to initialize twice.
+    if (hLibintlDLL)
+	return 1;
+
+    // Load gettext library from $VIMRUNTIME\GvimExt{64,32} directory.
+    // Add the directory to $PATH temporarily.
+    len = GetEnvironmentVariableW(L"PATH", NULL, 0);
+    len2 = MAX_PATH + 1 + len;
+    buf = (LPWSTR)malloc(len * sizeof(WCHAR));
+    buf2 = (LPWSTR)malloc(len2 * sizeof(WCHAR));
+    if (buf != NULL && buf2 != NULL)
+    {
+	GetEnvironmentVariableW(L"PATH", buf, len);
+# ifdef _WIN64
+	_snwprintf(buf2, len2, L"%S\\GvimExt64;%s", dir, buf);
+# else
+	_snwprintf(buf2, len2, L"%S\\GvimExt32;%s", dir, buf);
+# endif
+	SetEnvironmentVariableW(L"PATH", buf2);
+	hLibintlDLL = LoadLibrary(GETTEXT_DLL);
+# ifdef GETTEXT_DLL_ALT
+	if (!hLibintlDLL)
+	    hLibintlDLL = LoadLibrary(GETTEXT_DLL_ALT);
+# endif
+	SetEnvironmentVariableW(L"PATH", buf);
+    }
+    free(buf);
+    free(buf2);
+    if (!hLibintlDLL)
+	return 0;
+
+    // Get the addresses of the functions we need.
+    for (i = 0; libintl_entry[i].name != NULL
+					 && libintl_entry[i].ptr != NULL; ++i)
+    {
+	if ((*libintl_entry[i].ptr = GetProcAddress(hLibintlDLL,
+					      libintl_entry[i].name)) == NULL)
+	{
+	    dyn_libintl_end();
+	    return 0;
+	}
+    }
+    return 1;
+}
+
+    static void
+dyn_libintl_end(void)
+{
+    if (hLibintlDLL)
+	FreeLibrary(hLibintlDLL);
+    hLibintlDLL			= NULL;
+    dyn_libintl_gettext		= null_libintl_gettext;
+    dyn_libintl_textdomain	= null_libintl_textdomain;
+    dyn_libintl_bindtextdomain	= null_libintl_bindtextdomain;
+}
+
+    static char *
+null_libintl_gettext(const char *msgid)
+{
+    return (char *)msgid;
+}
+
+    static char *
+null_libintl_bindtextdomain(const char * /* domainname */, const char * /* dirname */)
+{
+    return NULL;
+}
+
+    static char *
+null_libintl_textdomain(const char*  /* domainname */)
+{
+    return NULL;
+}
+
+//
+// Setup for translating strings.
+//
+    static void
+dyn_gettext_load(void)
+{
+    char    szBuff[BUFSIZE];
+    DWORD   len;
+
+    // Try to locate the runtime files.  The path is used to find libintl.dll
+    // and the vim.mo files.
+    getRuntimeDir(szBuff);
+    if (szBuff[0] != 0)
+    {
+	len = (DWORD)strlen(szBuff);
+	if (dyn_libintl_init(szBuff))
+	{
+	    strcpy(szBuff + len, "lang");
+
+	    (*dyn_libintl_bindtextdomain)(VIMPACKAGE, szBuff);
+	    (*dyn_libintl_textdomain)(VIMPACKAGE);
+	}
+    }
+}
+
+    static void
+dyn_gettext_free(void)
+{
+    dyn_libintl_end();
+}
+#endif // FEAT_GETTEXT
+
+//
+// Global variables
+//
+UINT      g_cRefThisDll = 0;    // Reference count of this DLL.
+HINSTANCE g_hmodThisDll = NULL;	// Handle to this DLL itself.
+
+
+//---------------------------------------------------------------------------
+// DllMain
+//---------------------------------------------------------------------------
+extern "C" int APIENTRY
+DllMain(HINSTANCE hInstance, DWORD dwReason, LPVOID  /* lpReserved */)
+{
+    switch (dwReason)
+    {
+    case DLL_PROCESS_ATTACH:
+	// Extension DLL one-time initialization
+	g_hmodThisDll = hInstance;
+	break;
+
+    case DLL_PROCESS_DETACH:
+	break;
+    }
+
+    return 1;   // ok
+}
+
+    static void
+inc_cRefThisDLL()
+{
+#ifdef FEAT_GETTEXT
+    if (g_cRefThisDll == 0)
+	dyn_gettext_load();
+#endif
+    InterlockedIncrement((LPLONG)&g_cRefThisDll);
+}
+
+    static void
+dec_cRefThisDLL()
+{
+#ifdef FEAT_GETTEXT
+    if (InterlockedDecrement((LPLONG)&g_cRefThisDll) == 0)
+	dyn_gettext_free();
+#else
+    InterlockedDecrement((LPLONG)&g_cRefThisDll);
+#endif
+}
+
+//---------------------------------------------------------------------------
+// DllCanUnloadNow
+//---------------------------------------------------------------------------
+
+STDAPI DllCanUnloadNow(void)
+{
+    return (g_cRefThisDll == 0 ? S_OK : S_FALSE);
+}
+
+STDAPI DllGetClassObject(REFCLSID rclsid, REFIID riid, LPVOID *ppvOut)
+{
+    *ppvOut = NULL;
+
+    if (IsEqualIID(rclsid, CLSID_ShellExtension))
+    {
+	CShellExtClassFactory *pcf = new CShellExtClassFactory;
+
+	return pcf->QueryInterface(riid, ppvOut);
+    }
+
+    return CLASS_E_CLASSNOTAVAILABLE;
+}
+
+CShellExtClassFactory::CShellExtClassFactory()
+{
+    m_cRef = 0L;
+
+    inc_cRefThisDLL();
+}
+
+CShellExtClassFactory::~CShellExtClassFactory()
+{
+    dec_cRefThisDLL();
+}
+
+STDMETHODIMP CShellExtClassFactory::QueryInterface(REFIID riid,
+						   LPVOID FAR *ppv)
+{
+    *ppv = NULL;
+
+    // any interface on this object is the object pointer
+
+    if (IsEqualIID(riid, IID_IUnknown) || IsEqualIID(riid, IID_IClassFactory))
+    {
+	*ppv = (LPCLASSFACTORY)this;
+
+	AddRef();
+
+	return NOERROR;
+    }
+
+    return E_NOINTERFACE;
+}
+
+STDMETHODIMP_(ULONG) CShellExtClassFactory::AddRef()
+{
+    return InterlockedIncrement((LPLONG)&m_cRef);
+}
+
+STDMETHODIMP_(ULONG) CShellExtClassFactory::Release()
+{
+    if (InterlockedDecrement((LPLONG)&m_cRef))
+	return m_cRef;
+
+    delete this;
+
+    return 0L;
+}
+
+STDMETHODIMP CShellExtClassFactory::CreateInstance(LPUNKNOWN pUnkOuter,
+						      REFIID riid,
+						      LPVOID *ppvObj)
+{
+    *ppvObj = NULL;
+
+    // Shell extensions typically don't support aggregation (inheritance)
+
+    if (pUnkOuter)
+	return CLASS_E_NOAGGREGATION;
+
+    // Create the main shell extension object.  The shell will then call
+    // QueryInterface with IID_IShellExtInit--this is how shell extensions are
+    // initialized.
+
+    LPCSHELLEXT pShellExt = new CShellExt();  // create the CShellExt object
+
+    if (NULL == pShellExt)
+	return E_OUTOFMEMORY;
+
+    return pShellExt->QueryInterface(riid, ppvObj);
+}
+
+
+STDMETHODIMP CShellExtClassFactory::LockServer(BOOL  /* fLock */)
+{
+    return NOERROR;
+}
+
+// *********************** CShellExt *************************
+CShellExt::CShellExt()
+{
+    m_cRef = 0L;
+    m_pDataObj = NULL;
+
+    inc_cRefThisDLL();
+
+    LoadMenuIcon();
+}
+
+CShellExt::~CShellExt()
+{
+    if (m_pDataObj)
+	m_pDataObj->Release();
+
+    dec_cRefThisDLL();
+
+    if (m_hVimIconBitmap)
+	DeleteObject(m_hVimIconBitmap);
+}
+
+STDMETHODIMP CShellExt::QueryInterface(REFIID riid, LPVOID FAR *ppv)
+{
+    *ppv = NULL;
+
+    if (IsEqualIID(riid, IID_IShellExtInit) || IsEqualIID(riid, IID_IUnknown))
+    {
+	*ppv = (LPSHELLEXTINIT)this;
+    }
+    else if (IsEqualIID(riid, IID_IContextMenu))
+    {
+	*ppv = (LPCONTEXTMENU)this;
+    }
+
+    if (*ppv)
+    {
+	AddRef();
+
+	return NOERROR;
+    }
+
+    return E_NOINTERFACE;
+}
+
+STDMETHODIMP_(ULONG) CShellExt::AddRef()
+{
+    return InterlockedIncrement((LPLONG)&m_cRef);
+}
+
+STDMETHODIMP_(ULONG) CShellExt::Release()
+{
+
+    if (InterlockedDecrement((LPLONG)&m_cRef))
+	return m_cRef;
+
+    delete this;
+
+    return 0L;
+}
+
+
+//
+//  FUNCTION: CShellExt::Initialize(LPCITEMIDLIST, LPDATAOBJECT, HKEY)
+//
+//  PURPOSE: Called by the shell when initializing a context menu or property
+//	     sheet extension.
+//
+//  PARAMETERS:
+//    pIDFolder - Specifies the parent folder
+//    pDataObj  - Specifies the set of items selected in that folder.
+//    hRegKey   - Specifies the type of the focused item in the selection.
+//
+//  RETURN VALUE:
+//
+//    NOERROR in all cases.
+//
+//  COMMENTS:   Note that at the time this function is called, we don't know
+//		(or care) what type of shell extension is being initialized.
+//		It could be a context menu or a property sheet.
+//
+
+STDMETHODIMP CShellExt::Initialize(LPCITEMIDLIST  /* pIDFolder */,
+				   LPDATAOBJECT pDataObj,
+				   HKEY  /* hRegKey */)
+{
+    // Initialize can be called more than once
+    if (m_pDataObj)
+	m_pDataObj->Release();
+
+    // duplicate the object pointer and registry handle
+
+    if (pDataObj)
+    {
+	m_pDataObj = pDataObj;
+	pDataObj->AddRef();
+    }
+
+    return NOERROR;
+}
+
+
+//
+//  FUNCTION: CShellExt::QueryContextMenu(HMENU, UINT, UINT, UINT, UINT)
+//
+//  PURPOSE: Called by the shell just before the context menu is displayed.
+//	     This is where you add your specific menu items.
+//
+//  PARAMETERS:
+//    hMenu      - Handle to the context menu
+//    indexMenu  - Index of where to begin inserting menu items
+//    idCmdFirst - Lowest value for new menu ID's
+//    idCmtLast  - Highest value for new menu ID's
+//    uFlags     - Specifies the context of the menu event
+//
+//  RETURN VALUE:
+//
+//
+//  COMMENTS:
+//
+
+STDMETHODIMP CShellExt::QueryContextMenu(HMENU hMenu,
+					 UINT indexMenu,
+					 UINT idCmdFirst,
+					 UINT  /* idCmdLast */,
+					 UINT  /* uFlags */)
+{
+    UINT idCmd = idCmdFirst;
+
+    hres = m_pDataObj->GetData(&fmte, &medium);
+    if (medium.hGlobal)
+	cbFiles = DragQueryFile((HDROP)medium.hGlobal, (UINT)-1, 0, 0);
+
+    // InsertMenu(hMenu, indexMenu++, MF_SEPARATOR|MF_BYPOSITION, 0, NULL);
+
+    // Initialize m_cntOfHWnd to 0
+    m_cntOfHWnd = 0;
+
+    HKEY keyhandle;
+    bool showExisting = true;
+    bool showIcons = true;
+
+    // Check whether "Edit with existing Vim" entries are disabled.
+    if (RegOpenKeyEx(HKEY_LOCAL_MACHINE, "Software\\Vim\\Gvim", 0,
+				       KEY_READ, &keyhandle) == ERROR_SUCCESS)
+    {
+	if (RegQueryValueEx(keyhandle, "DisableEditWithExisting", 0, NULL,
+						 NULL, NULL) == ERROR_SUCCESS)
+	    showExisting = false;
+	if (RegQueryValueEx(keyhandle, "DisableContextMenuIcons", 0, NULL,
+						 NULL, NULL) == ERROR_SUCCESS)
+	    showIcons = false;
+	RegCloseKey(keyhandle);
+    }
+
+    // Retrieve all the vim instances, unless disabled.
+    if (showExisting)
+	EnumWindows(EnumWindowsProc, (LPARAM)this);
+
+    MENUITEMINFO mii = { sizeof(MENUITEMINFO) };
+    mii.fMask = MIIM_STRING | MIIM_ID;
+    if (showIcons)
+    {
+	mii.fMask |= MIIM_BITMAP;
+	mii.hbmpItem = m_hVimIconBitmap;
+    }
+
+    if (cbFiles > 1)
+    {
+	mii.wID = idCmd++;
+	mii.dwTypeData = _("Edit with Vim using &tabpages");
+	mii.cch = lstrlen(mii.dwTypeData);
+	InsertMenuItem(hMenu, indexMenu++, TRUE, &mii);
+
+	mii.wID = idCmd++;
+	mii.dwTypeData = _("Edit with single &Vim");
+	mii.cch = lstrlen(mii.dwTypeData);
+	InsertMenuItem(hMenu, indexMenu++, TRUE, &mii);
+
+	if (cbFiles <= 4)
+	{
+	    // Can edit up to 4 files in diff mode
+	    mii.wID = idCmd++;
+	    mii.dwTypeData = _("Diff with Vim");
+	    mii.cch = lstrlen(mii.dwTypeData);
+	    InsertMenuItem(hMenu, indexMenu++, TRUE, &mii);
+	    m_edit_existing_off = 3;
+	}
+	else
+	    m_edit_existing_off = 2;
+
+    }
+    else
+    {
+	mii.wID = idCmd++;
+	mii.dwTypeData = _("Edit with &Vim");
+	mii.cch = lstrlen(mii.dwTypeData);
+	InsertMenuItem(hMenu, indexMenu++, TRUE, &mii);
+	m_edit_existing_off = 1;
+    }
+
+    HMENU hSubMenu = NULL;
+    if (m_cntOfHWnd > 1)
+    {
+	hSubMenu = CreatePopupMenu();
+	mii.fMask |= MIIM_SUBMENU;
+	mii.wID = idCmd;
+	mii.dwTypeData = _("Edit with existing Vim");
+	mii.cch = lstrlen(mii.dwTypeData);
+	mii.hSubMenu = hSubMenu;
+	InsertMenuItem(hMenu, indexMenu++, TRUE, &mii);
+	mii.fMask = mii.fMask & ~MIIM_SUBMENU;
+	mii.hSubMenu = NULL;
+    }
+    // Now display all the vim instances
+    for (int i = 0; i < m_cntOfHWnd; i++)
+    {
+	char title[BUFSIZE];
+	char temp[BUFSIZE];
+	int index;
+	HMENU hmenu;
+
+	// Obtain window title, continue if can not
+	if (GetWindowText(m_hWnd[i], title, BUFSIZE - 1) == 0)
+	    continue;
+	// Truncate the title before the path, keep the file name
+	char *pos = strchr(title, '(');
+	if (pos != NULL)
+	{
+	    if (pos > title && pos[-1] == ' ')
+		--pos;
+	    *pos = 0;
+	}
+	// Now concatenate
+	if (m_cntOfHWnd > 1)
+	    temp[0] = '\0';
+	else
+	{
+	    strncpy(temp, _("Edit with existing Vim - "), BUFSIZE - 1);
+	    temp[BUFSIZE - 1] = '\0';
+	}
+	strncat(temp, title, BUFSIZE - 1 - strlen(temp));
+	temp[BUFSIZE - 1] = '\0';
+
+	mii.wID = idCmd++;
+	mii.dwTypeData = temp;
+	mii.cch = lstrlen(mii.dwTypeData);
+	if (m_cntOfHWnd > 1)
+	{
+	    hmenu = hSubMenu;
+	    index = i;
+	}
+	else
+	{
+	    hmenu = hMenu;
+	    index = indexMenu++;
+	}
+	InsertMenuItem(hmenu, index, TRUE, &mii);
+    }
+    // InsertMenu(hMenu, indexMenu++, MF_SEPARATOR|MF_BYPOSITION, 0, NULL);
+
+    // Must return number of menu items we added.
+    return ResultFromShort(idCmd-idCmdFirst);
+}
+
+//
+//  FUNCTION: CShellExt::InvokeCommand(LPCMINVOKECOMMANDINFO)
+//
+//  PURPOSE: Called by the shell after the user has selected on of the
+//	     menu items that was added in QueryContextMenu().
+//
+//  PARAMETERS:
+//    lpcmi - Pointer to an CMINVOKECOMMANDINFO structure
+//
+//  RETURN VALUE:
+//
+//
+//  COMMENTS:
+//
+
+STDMETHODIMP CShellExt::InvokeCommand(LPCMINVOKECOMMANDINFO lpcmi)
+{
+    HRESULT hr = E_INVALIDARG;
+    int gvimExtraOptions;
+
+    // If HIWORD(lpcmi->lpVerb) then we have been called programmatically
+    // and lpVerb is a command that should be invoked.  Otherwise, the shell
+    // has called us, and LOWORD(lpcmi->lpVerb) is the menu ID the user has
+    // selected.  Actually, it's (menu ID - idCmdFirst) from QueryContextMenu().
+    if (!HIWORD(lpcmi->lpVerb))
+    {
+	UINT idCmd = LOWORD(lpcmi->lpVerb);
+
+	if (idCmd >= m_edit_existing_off)
+	{
+	    // Existing with vim instance
+	    hr = PushToWindow(lpcmi->hwnd,
+		    lpcmi->lpDirectory,
+		    lpcmi->lpVerb,
+		    lpcmi->lpParameters,
+		    lpcmi->nShow,
+		    idCmd - m_edit_existing_off);
+	}
+	else
+	{
+	    switch (idCmd)
+	    {
+		case 0:
+		    gvimExtraOptions = EDIT_WITH_VIM_USE_TABPAGES;
+		    break;
+		case 1:
+		    gvimExtraOptions = EDIT_WITH_VIM_NO_OPTIONS;
+		    break;
+		case 2:
+		    gvimExtraOptions = EDIT_WITH_VIM_IN_DIFF_MODE;
+		    break;
+		default:
+		    // If execution reaches this point we likely have an
+		    // inconsistency between the code that setup the menus
+		    // and this code that determines what the user
+		    // selected.  This should be detected and fixed during 
+		    // development.
+		    return E_FAIL;
+	    }
+
+            LPCMINVOKECOMMANDINFOEX lpcmiex = (LPCMINVOKECOMMANDINFOEX)lpcmi;
+            LPCWSTR currentDirectory = lpcmi->cbSize == sizeof(CMINVOKECOMMANDINFOEX) ? lpcmiex->lpDirectoryW : NULL;
+
+	    hr = InvokeSingleGvim(lpcmi->hwnd,
+		    currentDirectory,
+		    lpcmi->lpVerb,
+		    lpcmi->lpParameters,
+		    lpcmi->nShow,
+		    gvimExtraOptions);
+	}
+    }
+    return hr;
+}
+
+STDMETHODIMP CShellExt::PushToWindow(HWND  /* hParent */,
+				   LPCSTR  /* pszWorkingDir */,
+				   LPCSTR  /* pszCmd */,
+				   LPCSTR  /* pszParam */,
+				   int  /* iShowCmd */,
+				   int idHWnd)
+{
+    HWND hWnd = m_hWnd[idHWnd];
+
+    // Show and bring vim instance to foreground
+    if (IsIconic(hWnd) != 0)
+	ShowWindow(hWnd, SW_RESTORE);
+    else
+	ShowWindow(hWnd, SW_SHOW);
+    SetForegroundWindow(hWnd);
+
+    // Post the selected files to the vim instance
+    PostMessage(hWnd, WM_DROPFILES, (WPARAM)medium.hGlobal, 0);
+
+    return NOERROR;
+}
+
+STDMETHODIMP CShellExt::GetCommandString(UINT_PTR  /* idCmd */,
+					 UINT uFlags,
+					 UINT FAR * /* reserved */,
+					 LPSTR pszName,
+					 UINT cchMax)
+{
+    if (uFlags == GCS_HELPTEXT && cchMax > 35)
+	lstrcpy(pszName, _("Edits the selected file(s) with Vim"));
+
+    return NOERROR;
+}
+
+BOOL CALLBACK CShellExt::EnumWindowsProc(HWND hWnd, LPARAM lParam)
+{
+    char temp[BUFSIZE];
+
+    // First do a bunch of check
+    // No invisible window
+    if (!IsWindowVisible(hWnd)) return TRUE;
+    // No child window ???
+    // if (GetParent(hWnd)) return TRUE;
+    // Class name should be Vim, if failed to get class name, return
+    if (GetClassName(hWnd, temp, sizeof(temp)) == 0)
+	return TRUE;
+    // Compare class name to that of vim, if not, return
+    if (_strnicmp(temp, "vim", sizeof("vim")) != 0)
+	return TRUE;
+    // First check if the number of vim instance exceeds MAX_HWND
+    CShellExt *cs = (CShellExt*) lParam;
+    if (cs->m_cntOfHWnd >= MAX_HWND) return TRUE;
+    // Now we get the vim window, put it into some kind of array
+    cs->m_hWnd[cs->m_cntOfHWnd] = hWnd;
+    cs->m_cntOfHWnd ++;
+
+    return TRUE; // continue enumeration (otherwise this would be false)
+}
+
+BOOL CShellExt::LoadMenuIcon()
+{
+	char vimExeFile[BUFSIZE];
+	getGvimName(vimExeFile, 1);
+	if (vimExeFile[0] == '\0')
+		return FALSE;
+	HICON hVimIcon;
+	if (ExtractIconEx(vimExeFile, 0, NULL, &hVimIcon, 1) == 0)
+		return FALSE;
+	m_hVimIconBitmap = IconToBitmap(hVimIcon,
+		GetSysColorBrush(COLOR_MENU),
+		GetSystemMetrics(SM_CXSMICON),
+		GetSystemMetrics(SM_CYSMICON));
+	return TRUE;
+}
+
+    static char *
+searchpath(char *name)
+{
+    static char widename[2 * BUFSIZE];
+    static char location[2 * BUFSIZE + 2];
+
+    // There appears to be a bug in FindExecutableA() on Windows NT.
+    // Use FindExecutableW() instead...
+    MultiByteToWideChar(CP_ACP, 0, (LPCSTR)name, -1,
+	    (LPWSTR)widename, BUFSIZE);
+    if (FindExecutableW((LPCWSTR)widename, (LPCWSTR)"",
+		(LPWSTR)location) > (HINSTANCE)32)
+    {
+	WideCharToMultiByte(CP_ACP, 0, (LPWSTR)location, -1,
+		(LPSTR)widename, 2 * BUFSIZE, NULL, NULL);
+	return widename;
+    }
+    return (char *)"";
+}
+
+
+STDMETHODIMP CShellExt::InvokeSingleGvim(HWND hParent,
+				   LPCWSTR  workingDir,
+				   LPCSTR  /* pszCmd */,
+				   LPCSTR  /* pszParam */,
+				   int  /* iShowCmd */,
+				   int gvimExtraOptions)
+{
+    wchar_t	m_szFileUserClickedOn[BUFSIZE];
+    wchar_t	*cmdStrW;
+    size_t	cmdlen;
+    size_t	len;
+    UINT i;
+
+    cmdlen = BUFSIZE;
+    cmdStrW  = (wchar_t *) malloc(cmdlen * sizeof(wchar_t));
+    if (cmdStrW == NULL)
+	return E_FAIL;
+    getGvimInvocationW(cmdStrW);
+
+    if (gvimExtraOptions == EDIT_WITH_VIM_IN_DIFF_MODE)
+	wcscat(cmdStrW, L" -d");
+    else if (gvimExtraOptions == EDIT_WITH_VIM_USE_TABPAGES)
+	wcscat(cmdStrW, L" -p");
+    for (i = 0; i < cbFiles; i++)
+    {
+	DragQueryFileW((HDROP)medium.hGlobal,
+		i,
+		m_szFileUserClickedOn,
+		sizeof(m_szFileUserClickedOn));
+
+	len = wcslen(cmdStrW) + wcslen(m_szFileUserClickedOn) + 4;
+	if (len > cmdlen)
+	{
+	    cmdlen = len + BUFSIZE;
+	    wchar_t *cmdStrW_new = (wchar_t *)realloc(cmdStrW, cmdlen * sizeof(wchar_t));
+	    if (cmdStrW_new == NULL)
+	    {
+		free(cmdStrW);
+		return E_FAIL;
+	    }
+	    cmdStrW = cmdStrW_new;
+	}
+	wcscat(cmdStrW, L" \"");
+	wcscat(cmdStrW, m_szFileUserClickedOn);
+	wcscat(cmdStrW, L"\"");
+    }
+
+    STARTUPINFOW si;
+    PROCESS_INFORMATION pi;
+
+    ZeroMemory(&si, sizeof(si));
+    si.cb = sizeof(si);
+
+    // Start the child process.
+    if (!CreateProcessW(NULL,	// No module name (use command line).
+		cmdStrW,	// Command line.
+		NULL,		// Process handle not inheritable.
+		NULL,		// Thread handle not inheritable.
+		FALSE,		// Set handle inheritance to FALSE.
+		0,		// No creation flags.
+		NULL,		// Use parent's environment block.
+		workingDir,  // Use parent's starting directory.
+		&si,		// Pointer to STARTUPINFO structure.
+		&pi)		// Pointer to PROCESS_INFORMATION structure.
+       )
+    {
+	MessageBox(
+	    hParent,
+	    _("Error creating process: Check if gvim is in your path!"),
+	    _("gvimext.dll error"),
+	    MB_OK);
+    }
+    else
+    {
+	CloseHandle(pi.hProcess);
+	CloseHandle(pi.hThread);
+    }
+    free(cmdStrW);
+
+    return NOERROR;
+}
diff --git a/src/GvimExt/gvimext.def b/src/GvimExt/gvimext.def
new file mode 100644
index 0000000..e6d66f4
--- /dev/null
+++ b/src/GvimExt/gvimext.def
@@ -0,0 +1,8 @@
+;gvimdef.def : Declares the module parameters for the DLL.
+
+LIBRARY      gvimext
+; DESCRIPTION  'Vim Shell Extension'
+
+EXPORTS
+    DllCanUnloadNow private
+    DllGetClassObject private
diff --git a/src/GvimExt/gvimext.h b/src/GvimExt/gvimext.h
new file mode 100644
index 0000000..b85f32e
--- /dev/null
+++ b/src/GvimExt/gvimext.h
@@ -0,0 +1,168 @@
+/* vi:set ts=8 sts=4 sw=4:
+ *
+ * VIM - Vi IMproved	gvimext by Tianmiao Hu
+ *
+ * Do ":help uganda"  in Vim to read copying and usage conditions.
+ * Do ":help credits" in Vim to see a list of people who contributed.
+ */
+
+/*
+ * If you have any questions or any suggestions concerning gvimext, please
+ * contact Tianmiao Hu: tianmiao@acm.org.
+ */
+
+#if !defined(AFX_STDAFX_H__3389658B_AD83_11D3_9C1E_0090278BBD99__INCLUDED_)
+#define AFX_STDAFX_H__3389658B_AD83_11D3_9C1E_0090278BBD99__INCLUDED_
+
+#if defined(_MSC_VER) && _MSC_VER > 1000
+#pragma once
+#endif
+
+// Insert your headers here
+// #define WIN32_LEAN_AND_MEAN		// Exclude rarely-used stuff from Windows headers
+
+//--------------------------------------------------------------
+// common user interface routines
+//
+//
+//--------------------------------------------------------------
+
+#ifndef STRICT
+# define STRICT
+#endif
+
+#define INC_OLE2	// MS-Windows, get ole2 from windows.h
+
+/* Visual Studio 2005 has 'deprecated' many of the standard CRT functions */
+#if defined(_MSC_VER) && _MSC_VER >= 1400
+# define _CRT_SECURE_NO_DEPRECATE
+# define _CRT_NONSTDC_NO_DEPRECATE
+#endif
+
+#include <windows.h>
+#include <windowsx.h>
+#include <shlobj.h>
+#include <wchar.h>
+
+#define ResultFromShort(i)  ResultFromScode(MAKE_SCODE(SEVERITY_SUCCESS, 0, (USHORT)(i)))
+
+// Initialize GUIDs (should be done only and at-least once per DLL/EXE)
+//
+#pragma data_seg(".text")
+#define INITGUID
+#include <initguid.h>
+
+//
+// The class ID of this Shell extension class.
+//
+// class id:  {51EEE242-AD87-11d3-9C1E-0090278BBD99}
+//
+//
+// NOTE!!!  If you use this shell extension as a starting point,
+//	    you MUST change the GUID below.  Simply run UUIDGEN.EXE
+//	    to generate a new GUID.
+//
+
+// {51EEE242-AD87-11d3-9C1E-0090278BBD99}
+// static const GUID <<name>> =
+// { 0x51eee242, 0xad87, 0x11d3, { 0x9c, 0x1e, 0x0, 0x90, 0x27, 0x8b, 0xbd, 0x99 } };
+//
+//
+
+// {51EEE242-AD87-11d3-9C1E-0090278BBD99}
+// IMPLEMENT_OLECREATE(<<class>>, <<external_name>>,
+// 0x51eee242, 0xad87, 0x11d3, 0x9c, 0x1e, 0x0, 0x90, 0x27, 0x8b, 0xbd, 0x99);
+//
+
+// {51EEE242-AD87-11d3-9C1E-0090278BBD99}  -- this is the registry format
+DEFINE_GUID(CLSID_ShellExtension, 0x51eee242, 0xad87, 0x11d3, 0x9c, 0x1e, 0x0, 0x90, 0x27, 0x8b, 0xbd, 0x99);
+
+// this class factory object creates context menu handlers for windows 32 shell
+class CShellExtClassFactory : public IClassFactory
+{
+protected:
+	ULONG	m_cRef;
+
+public:
+	CShellExtClassFactory();
+	~CShellExtClassFactory();
+
+	//IUnknown members
+	STDMETHODIMP			QueryInterface(REFIID, LPVOID FAR *);
+	STDMETHODIMP_(ULONG)	AddRef();
+	STDMETHODIMP_(ULONG)	Release();
+
+	//IClassFactory members
+	STDMETHODIMP		CreateInstance(LPUNKNOWN, REFIID, LPVOID FAR *);
+	STDMETHODIMP		LockServer(BOOL);
+
+};
+typedef CShellExtClassFactory *LPCSHELLEXTCLASSFACTORY;
+#define MAX_HWND 100
+
+// this is the actual OLE Shell context menu handler
+class CShellExt : public IContextMenu,
+			 IShellExtInit
+{
+private:
+    BOOL LoadMenuIcon();
+
+protected:
+    ULONG	 m_cRef;
+    LPDATAOBJECT m_pDataObj;
+    UINT	 m_edit_existing_off;
+    HBITMAP	 m_hVimIconBitmap;
+
+    // For some reason, this callback must be static
+    static BOOL CALLBACK EnumWindowsProc(HWND hWnd, LPARAM lParam);
+
+    STDMETHODIMP PushToWindow(HWND hParent,
+	    LPCSTR pszWorkingDir,
+	    LPCSTR pszCmd,
+	    LPCSTR pszParam,
+	    int iShowCmd,
+	    int idHWnd);
+
+    STDMETHODIMP InvokeSingleGvim(HWND hParent,
+	    LPCWSTR workingDir,
+	    LPCSTR pszCmd,
+	    LPCSTR pszParam,
+	    int iShowCmd,
+	    int gvimExtraOptions);
+
+public:
+    int		 m_cntOfHWnd;
+    HWND	 m_hWnd[MAX_HWND];
+    CShellExt();
+    ~CShellExt();
+
+    //IUnknown members
+    STDMETHODIMP QueryInterface(REFIID, LPVOID FAR *);
+    STDMETHODIMP_(ULONG) AddRef();
+    STDMETHODIMP_(ULONG) Release();
+
+    //IShell members
+    STDMETHODIMP QueryContextMenu(HMENU hMenu,
+	    UINT indexMenu,
+	    UINT idCmdFirst,
+	    UINT idCmdLast,
+	    UINT uFlags);
+
+    STDMETHODIMP InvokeCommand(LPCMINVOKECOMMANDINFO lpcmi);
+
+    STDMETHODIMP GetCommandString(UINT_PTR idCmd,
+	    UINT uFlags,
+	    UINT FAR *reserved,
+	    LPSTR pszName,
+	    UINT cchMax);
+
+    //IShellExtInit methods
+    STDMETHODIMP Initialize(LPCITEMIDLIST pIDFolder,
+	    LPDATAOBJECT pDataObj,
+	    HKEY hKeyID);
+};
+
+typedef CShellExt *LPCSHELLEXT;
+#pragma data_seg()
+
+#endif
diff --git a/src/GvimExt/gvimext.inf b/src/GvimExt/gvimext.inf
new file mode 100644
index 0000000..8b45bb1
--- /dev/null
+++ b/src/GvimExt/gvimext.inf
@@ -0,0 +1,22 @@
+[Version]
+Signature="$Windows NT$""
+Provider="Tianmiao"
+
+[Manufacture]
+
+[DefaultInstall]
+AddReg=ThisDll.Add.Reg
+
+[DefaultUninstall]
+DelReg=ThisDLL.Add.Reg
+
+[ThisDll.Add.Reg]
+HKCR,CLSID\{51EEE242-AD87-11d3-9C1E-0090278BBD99}
+HKCR,CLSID\{51EEE242-AD87-11d3-9C1E-0090278BBD99}\InProcServer32
+HKCR,*\shellex\ContextMenuHandlers\gvim
+HKLM,"SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions\Approved",{51EEE242-AD87-11d3-9C1E-0090278BBD99}
+HKLM,Software\Vim\Gvim
+HKLM,"Software\Microsoft\Windows\CurrentVersion\Uninstall\Vim 6.0"
+
+[Strings]
+ThisDll="gvimext.dll"
diff --git a/src/GvimExt/gvimext.rc b/src/GvimExt/gvimext.rc
new file mode 100644
index 0000000..10476da
--- /dev/null
+++ b/src/GvimExt/gvimext.rc
@@ -0,0 +1,109 @@
+//Microsoft Developer Studio generated resource script.
+//
+#include "resource.h"
+
+#define APSTUDIO_READONLY_SYMBOLS
+/////////////////////////////////////////////////////////////////////////////
+//
+// Generated from the TEXTINCLUDE 2 resource.
+//
+#include "winresrc.h"
+
+/////////////////////////////////////////////////////////////////////////////
+#undef APSTUDIO_READONLY_SYMBOLS
+
+/////////////////////////////////////////////////////////////////////////////
+// English (U.S.) resources
+
+#if !defined(AFX_RESOURCE_DLL) || defined(AFX_TARG_ENU)
+#ifdef _WIN32
+LANGUAGE LANG_ENGLISH, SUBLANG_ENGLISH_US
+#pragma code_page(1252)
+#endif //_WIN32
+
+#ifndef _MAC
+/////////////////////////////////////////////////////////////////////////////
+//
+// Version
+//
+
+VS_VERSION_INFO VERSIONINFO
+ FILEVERSION 1,0,0,1
+ PRODUCTVERSION 1,0,0,1
+ FILEFLAGSMASK 0x3fL
+#ifdef _DEBUG
+ FILEFLAGS 0x3L
+#else
+ FILEFLAGS 0x2L
+#endif
+ FILEOS 0x4L
+ FILETYPE 0x2L
+ FILESUBTYPE 0x0L
+BEGIN
+    BLOCK "StringFileInfo"
+    BEGIN
+        BLOCK "040904b0"
+        BEGIN
+            VALUE "Comments", "Developed using COM architecture!\0"
+            VALUE "CompanyName", "Tianmiao Hu's Developer Studio\0"
+            VALUE "FileDescription", "A small project for the context menu of gvim!\0"
+            VALUE "FileVersion", "1, 0, 0, 1\0"
+            VALUE "InternalName", "gvim right-click menu extension\0"
+            VALUE "LegalCopyright", "Copyright � 1999 Tianmiao Hu\0"
+            VALUE "LegalTrademarks", "Tianmiao Hu's Gvim Context Menu Extension\0"
+            VALUE "OriginalFilename", "gvimext.dll\0"
+            VALUE "PrivateBuild", "\0"
+            VALUE "ProductName", "Tianmiao Hu's  gvimext context menu extension\0"
+            VALUE "ProductVersion", "1, 0, 0, 1\0"
+            VALUE "SpecialBuild", "\0"
+        END
+    END
+    BLOCK "VarFileInfo"
+    BEGIN
+        VALUE "Translation", 0x409, 1200
+    END
+END
+
+#endif    // !_MAC
+
+
+#ifdef APSTUDIO_INVOKED
+/////////////////////////////////////////////////////////////////////////////
+//
+// TEXTINCLUDE
+//
+
+1 TEXTINCLUDE DISCARDABLE 
+BEGIN
+    "resource.h\0"
+END
+
+2 TEXTINCLUDE DISCARDABLE 
+BEGIN
+    "#include ""afxres.h""\r\n"
+    "\0"
+END
+
+3 TEXTINCLUDE DISCARDABLE 
+BEGIN
+    "\r\n"
+    "\0"
+END
+
+#endif    // APSTUDIO_INVOKED
+
+#endif    // English (U.S.) resources
+/////////////////////////////////////////////////////////////////////////////
+
+
+
+#ifndef APSTUDIO_INVOKED
+/////////////////////////////////////////////////////////////////////////////
+//
+// Generated from the TEXTINCLUDE 3 resource.
+//
+
+
+/////////////////////////////////////////////////////////////////////////////
+#endif    // not APSTUDIO_INVOKED
+
diff --git a/src/GvimExt/gvimext_ming.def b/src/GvimExt/gvimext_ming.def
new file mode 100644
index 0000000..b96e1d3
--- /dev/null
+++ b/src/GvimExt/gvimext_ming.def
@@ -0,0 +1,10 @@
+;gvimdef_ming.def : Declares the module parameters for the DLL.
+;The mingw environment doesn't know anything about private declarations
+;Hence this is the same file as gvimext.def with private removed
+
+LIBRARY      gvimext
+; DESCRIPTION  'Vim Shell Extension build with MinGW'
+
+EXPORTS
+    DllCanUnloadNow = DllCanUnloadNow@0
+    DllGetClassObject  = DllGetClassObject@12
diff --git a/src/GvimExt/gvimext_ming.rc b/src/GvimExt/gvimext_ming.rc
new file mode 100644
index 0000000..6c69854
--- /dev/null
+++ b/src/GvimExt/gvimext_ming.rc
@@ -0,0 +1,45 @@
+#include <windows.h>
+#define xstr(x) str(x)
+#define str(x) #x
+VS_VERSION_INFO VERSIONINFO
+ FILEVERSION 1,0,0,1
+ PRODUCTVERSION 1,0,0,1
+ FILEFLAGSMASK 0x3fL
+#ifdef _DEBUG
+ FILEFLAGS 0x3L
+#else
+ FILEFLAGS 0x2L
+#endif
+ FILEOS 0x4L
+ FILETYPE VFT_DLL
+ FILESUBTYPE 0x0L
+{
+    BLOCK "StringFileInfo"
+    {
+        BLOCK "040904b0"
+        {
+            VALUE "Comments", "Developed using COM architecture!\0"
+            VALUE "CompanyName", "Tianmiao Hu's Developer Studio\0"
+            VALUE "FileDescription", "A small project for the context menu of gvim!\0"
+            VALUE "FileVersion", "1, 0, 0, 1\0"
+            VALUE "InternalName", "gvim right-click menu extension\0"
+            VALUE "LegalCopyright", "Copyright � 1999 Tianmiao Hu\0"
+            VALUE "LegalTrademarks", "Tianmiao Hu's Gvim Context Menu Extension\0"
+            VALUE "OriginalFilename", "gvimext.dll\0"
+            VALUE "PrivateBuild", "\0"
+            VALUE "ProductName", "Tianmiao Hu's  gvimext context menu extension\0"
+            VALUE "ProductVersion", "1, 0, 0, 1\0"
+
+#if defined(__GNUC__)
+            VALUE "SpecialBuild", "Build With " "MingW " xstr(__GNUC__) "." xstr(__GNUC_MINOR__) "." xstr(__GNUC_PATCHLEVEL__)  " on " __DATE__ " " __TIME__ "\0"
+#else
+            VALUE "SpecialBuild", "Unknown compiler\0"
+
+#endif
+        }
+    }
+    BLOCK "VarFileInfo"
+    {
+        VALUE "Translation", 0x409, 1200
+    }
+}
diff --git a/src/GvimExt/resource.h b/src/GvimExt/resource.h
new file mode 100644
index 0000000..8ddc823
--- /dev/null
+++ b/src/GvimExt/resource.h
@@ -0,0 +1,15 @@
+//{{NO_DEPENDENCIES}}
+// Microsoft Developer Studio generated include file.
+// Used by gvimext.rc
+//
+
+// Next default values for new objects
+//
+#ifdef APSTUDIO_INVOKED
+#ifndef APSTUDIO_READONLY_SYMBOLS
+#define _APS_NEXT_RESOURCE_VALUE	101
+#define _APS_NEXT_COMMAND_VALUE		40001
+#define _APS_NEXT_CONTROL_VALUE		1000
+#define _APS_NEXT_SYMED_VALUE		101
+#endif
+#endif
diff --git a/src/GvimExt/uninst.bat b/src/GvimExt/uninst.bat
new file mode 100644
index 0000000..71d14f6
--- /dev/null
+++ b/src/GvimExt/uninst.bat
@@ -0,0 +1 @@
+rundll32.exe setupapi,InstallHinfSection DefaultUninstall 128 %1