updated for version 7.0002

1 files changed, 979 insertions, 0 deletions

diff --git a/src/GvimExt/gvimext.cpp b/src/GvimExt/gvimext.cpp
new file mode 100644
index 000000000..57fbf8119
--- /dev/null
+++ b/src/GvimExt/gvimext.cpp
@@ -0,0 +1,979 @@
+/* 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"
+
+#ifdef __BORLANDC__
+# include <dir.h>
+# ifndef _strnicmp
+#  define _strnicmp(a, b, c) strnicmp((a), (b), (c))
+# endif
+#else
+static char *searchpath(char *name);
+#endif
+
+// 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;
+
+//
+// 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[MAX_PATH].  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 = MAX_PATH;
+	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("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("gvim.bat"));
+	if (name[0] == 0)
+	    strcpy(name, "gvim");	// finds gvim.bat or gvim.exe
+
+	// avoid that Vim tries to expand wildcards in the file names
+	strcat(name, " --literal");
+    }
+}
+
+//
+// Get the Vim runtime directory into buf[MAX_PATH].
+// 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 = strlen(buf) - 1; idx >= 0; idx--)
+	    if (buf[idx] == '\\' || buf[idx] == '/')
+	    {
+		buf[idx + 1] = 0;
+		break;
+	    }
+    }
+}
+
+//
+// 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"
+# 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[] =
+    {
+	{"gettext",		(FARPROC*)&dyn_libintl_gettext},
+	{"textdomain",		(FARPROC*)&dyn_libintl_textdomain},
+	{"bindtextdomain",	(FARPROC*)&dyn_libintl_bindtextdomain},
+	{NULL, NULL}
+    };
+
+    // No need to initialize twice.
+    if (hLibintlDLL)
+	return 1;
+
+    // Load gettext library, first try the Vim runtime directory, then search
+    // the path.
+    strcat(dir, GETTEXT_DLL);
+    hLibintlDLL = LoadLibrary(dir);
+    if (!hLibintlDLL)
+    {
+	hLibintlDLL = LoadLibrary(GETTEXT_DLL);
+	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[MAX_PATH];
+    char    szLang[MAX_PATH];
+    DWORD   len;
+    HKEY    keyhandle;
+    int	    gotlang = 0;
+
+    strcpy(szLang, "LANG=");
+
+    // First try getting the language from the registry, this can be
+    // used to overrule the system language.
+    if (RegOpenKeyEx(HKEY_LOCAL_MACHINE, "Software\\Vim\\Gvim", 0,
+				       KEY_READ, &keyhandle) == ERROR_SUCCESS)
+    {
+	len = MAX_PATH;
+	if (RegQueryValueEx(keyhandle, "lang", 0, NULL, (BYTE*)szBuff, &len)
+							     == ERROR_SUCCESS)
+	{
+	    szBuff[len] = 0;
+	    strcat(szLang, szBuff);
+	    gotlang = 1;
+	}
+	RegCloseKey(keyhandle);
+    }
+
+    if (!gotlang && getenv("LANG") == NULL)
+    {
+	// Get the language from the system.
+	// Could use LOCALE_SISO639LANGNAME, but it's not in Win95.
+	// LOCALE_SABBREVLANGNAME gives us three letters, like "enu", we use
+	// only the first two.
+	len = GetLocaleInfo(LOCALE_USER_DEFAULT, LOCALE_SABBREVLANGNAME,
+						    (LPTSTR)szBuff, MAX_PATH);
+	if (len >= 2 && _strnicmp(szBuff, "en", 2) != 0)
+	{
+	    // There are a few exceptions (probably more)
+	    if (_strnicmp(szBuff, "cht", 3) == 0
+					  || _strnicmp(szBuff, "zht", 3) == 0)
+		strcpy(szBuff, "zh_TW");
+	    else if (_strnicmp(szBuff, "chs", 3) == 0
+					  || _strnicmp(szBuff, "zhc", 3) == 0)
+		strcpy(szBuff, "zh_CN");
+	    else if (_strnicmp(szBuff, "jp", 2) == 0)
+		strcpy(szBuff, "ja");
+	    else
+		szBuff[2] = 0;	// truncate to two-letter code
+	    strcat(szLang, szBuff);
+	    gotlang = 1;
+	}
+    }
+    if (gotlang)
+	putenv(szLang);
+
+    // 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 = 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();
+}
+
+CShellExt::~CShellExt()
+{
+    if (m_pDataObj)
+	m_pDataObj->Release();
+
+    dec_cRefThisDLL();
+}
+
+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  - Spefifies 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;
+    // Retieve all the vim instances
+    EnumWindows(EnumWindowsProc, (LPARAM)this);
+
+    if (cbFiles > 1)
+    {
+	InsertMenu(hMenu,
+		indexMenu++,
+		MF_STRING|MF_BYPOSITION,
+		idCmd++,
+		_("Edit with &multiple Vims"));
+
+	InsertMenu(hMenu,
+		indexMenu++,
+		MF_STRING|MF_BYPOSITION,
+		idCmd++,
+		_("Edit with single &Vim"));
+
+	if (cbFiles <= 4)
+	{
+	    // Can edit up to 4 files in diff mode
+	    InsertMenu(hMenu,
+		    indexMenu++,
+		    MF_STRING|MF_BYPOSITION,
+		    idCmd++,
+		    _("&Diff with Vim"));
+	    m_edit_existing_off = 3;
+	}
+	else
+	    m_edit_existing_off = 2;
+
+    }
+    else
+    {
+	InsertMenu(hMenu,
+		indexMenu++,
+		MF_STRING|MF_BYPOSITION,
+		idCmd++,
+		_("Edit with &Vim"));
+	m_edit_existing_off = 1;
+    }
+
+    // Now display all the vim instances
+    for (int i = 0; i < m_cntOfHWnd; i++)
+    {
+	char title[MAX_PATH];
+	char temp[MAX_PATH];
+
+	// Obtain window title, continue if can not
+	if (GetWindowText(m_hWnd[i], title, MAX_PATH - 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
+	strncpy(temp, _("Edit with existing Vim - &"), MAX_PATH - 1);
+	strncat(temp, title, MAX_PATH - 1);
+	InsertMenu(hMenu,
+		indexMenu++,
+		MF_STRING|MF_BYPOSITION,
+		idCmd++,
+		temp);
+    }
+    // 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;
+
+    // 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:
+		    hr = InvokeGvim(lpcmi->hwnd,
+			    lpcmi->lpDirectory,
+			    lpcmi->lpVerb,
+			    lpcmi->lpParameters,
+			    lpcmi->nShow);
+		    break;
+		case 1:
+		    hr = InvokeSingleGvim(lpcmi->hwnd,
+			    lpcmi->lpDirectory,
+			    lpcmi->lpVerb,
+			    lpcmi->lpParameters,
+			    lpcmi->nShow,
+			    0);
+		    break;
+		case 2:
+		    hr = InvokeSingleGvim(lpcmi->hwnd,
+			    lpcmi->lpDirectory,
+			    lpcmi->lpVerb,
+			    lpcmi->lpParameters,
+			    lpcmi->nShow,
+			    1);
+		    break;
+	    }
+	}
+    }
+    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 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[MAX_PATH];
+
+    // 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)
+}
+
+#ifdef WIN32
+// This symbol is not defined in older versions of the SDK or Visual C++.
+
+#ifndef VER_PLATFORM_WIN32_WINDOWS
+# define VER_PLATFORM_WIN32_WINDOWS 1
+#endif
+
+static DWORD g_PlatformId;
+
+//
+// Set g_PlatformId to VER_PLATFORM_WIN32_NT (NT) or
+// VER_PLATFORM_WIN32_WINDOWS (Win95).
+//
+    static void
+PlatformId(void)
+{
+    static int done = FALSE;
+
+    if (!done)
+    {
+	OSVERSIONINFO ovi;
+
+	ovi.dwOSVersionInfoSize = sizeof(ovi);
+	GetVersionEx(&ovi);
+
+	g_PlatformId = ovi.dwPlatformId;
+	done = TRUE;
+    }
+}
+
+# ifndef __BORLANDC__
+    static char *
+searchpath(char *name)
+{
+    static char widename[2 * MAX_PATH];
+    static char location[2 * MAX_PATH + 2];
+
+    // There appears to be a bug in FindExecutableA() on Windows NT.
+    // Use FindExecutableW() instead...
+    PlatformId();
+    if (g_PlatformId == VER_PLATFORM_WIN32_NT)
+    {
+	MultiByteToWideChar(CP_ACP, 0, (LPCTSTR)name, -1,
+		(LPWSTR)widename, MAX_PATH);
+	if (FindExecutableW((LPCWSTR)widename, (LPCWSTR)"",
+		    (LPWSTR)location) > (HINSTANCE)32)
+	{
+	    WideCharToMultiByte(CP_ACP, 0, (LPWSTR)location, -1,
+		    (LPSTR)widename, 2 * MAX_PATH, NULL, NULL);
+	    return widename;
+	}
+    }
+    else
+    {
+	if (FindExecutableA((LPCTSTR)name, (LPCTSTR)"",
+		    (LPTSTR)location) > (HINSTANCE)32)
+	    return location;
+    }
+    return "";
+}
+# endif
+#endif
+
+STDMETHODIMP CShellExt::InvokeGvim(HWND hParent,
+				   LPCSTR pszWorkingDir,
+				   LPCSTR pszCmd,
+				   LPCSTR pszParam,
+				   int iShowCmd)
+{
+    char m_szFileUserClickedOn[MAX_PATH];
+    char cmdStr[MAX_PATH];
+    UINT i;
+
+    for (i = 0; i < cbFiles; i++)
+    {
+	DragQueryFile((HDROP)medium.hGlobal,
+		i,
+		m_szFileUserClickedOn,
+		sizeof(m_szFileUserClickedOn));
+
+	getGvimName(cmdStr, 0);
+	strcat(cmdStr, " \"");
+
+	if ((strlen(cmdStr) + strlen(m_szFileUserClickedOn) + 2) < MAX_PATH)
+	{
+	    strcat(cmdStr, m_szFileUserClickedOn);
+	    strcat(cmdStr, "\"");
+
+	    STARTUPINFO si;
+	    PROCESS_INFORMATION pi;
+
+	    ZeroMemory(&si, sizeof(si));
+	    si.cb = sizeof(si);
+
+	    // Start the child process.
+	    if (!CreateProcess(NULL,	// No module name (use command line).
+			cmdStr,		// 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.
+			NULL,		// 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 );
+	    }
+	}
+	else
+	{
+	    MessageBox(
+		hParent,
+		_("Path length too long!"),
+		_("gvimext.dll error"),
+		MB_OK);
+	}
+    }
+
+    return NOERROR;
+}
+
+
+STDMETHODIMP CShellExt::InvokeSingleGvim(HWND hParent,
+				   LPCSTR pszWorkingDir,
+				   LPCSTR pszCmd,
+				   LPCSTR pszParam,
+				   int iShowCmd,
+				   int useDiff)
+{
+    char	m_szFileUserClickedOn[MAX_PATH];
+    char	*cmdStr;
+    size_t	cmdlen;
+    size_t	len;
+    UINT i;
+
+    cmdlen = MAX_PATH;
+    cmdStr = (char *)malloc(cmdlen);
+    getGvimName(cmdStr, 0);
+    if (useDiff)
+	strcat(cmdStr, " -d");
+    for (i = 0; i < cbFiles; i++)
+    {
+	DragQueryFile((HDROP)medium.hGlobal,
+		i,
+		m_szFileUserClickedOn,
+		sizeof(m_szFileUserClickedOn));
+
+	len = strlen(cmdStr) + strlen(m_szFileUserClickedOn) + 4;
+	if (len > cmdlen)
+	{
+	    cmdlen = len + MAX_PATH;
+	    cmdStr = (char *)realloc(cmdStr, cmdlen);
+	}
+	strcat(cmdStr, " \"");
+	strcat(cmdStr, m_szFileUserClickedOn);
+	strcat(cmdStr, "\"");
+    }
+
+    STARTUPINFO si;
+    PROCESS_INFORMATION pi;
+
+    ZeroMemory(&si, sizeof(si));
+    si.cb = sizeof(si);
+
+    // Start the child process.
+    if (!CreateProcess(NULL,	// No module name (use command line).
+		cmdStr,		// 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.
+		NULL,		// 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(cmdStr);
+
+    return NOERROR;
+}