/* * handling of SHELL32.DLL OLE-Objects * * Copyright 1997 Marcus Meissner * Copyright 1998 Juergen Schmied * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library 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 * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include "config.h" #include #include #include #define COBJMACROS #include "windef.h" #include "winbase.h" #include "shellapi.h" #include "wingdi.h" #include "winuser.h" #include "shlobj.h" #include "shlguid.h" #include "winreg.h" #include "winerror.h" #include "undocshell.h" #include "wine/unicode.h" #include "shell32_main.h" #include "wine/debug.h" #include "shlwapi.h" #include "debughlp.h" WINE_DEFAULT_DEBUG_CHANNEL(shell); extern HRESULT WINAPI IFSFolder_Constructor(IUnknown * pUnkOuter, REFIID riid, LPVOID * ppv); const WCHAR sShell32[12] = {'S','H','E','L','L','3','2','.','D','L','L','\0'}; const WCHAR sOLE32[10] = {'O','L','E','3','2','.','D','L','L','\0'}; HINSTANCE hShellOle32 = 0; /************************************************************************** * Default ClassFactory types */ typedef HRESULT (CALLBACK *LPFNCREATEINSTANCE)(IUnknown* pUnkOuter, REFIID riid, LPVOID* ppvObject); IClassFactory * IDefClF_fnConstructor(LPFNCREATEINSTANCE lpfnCI, PLONG pcRefDll, REFIID riidInst); /* this table contains all CLSID's of shell32 objects */ struct { REFIID riid; LPFNCREATEINSTANCE lpfnCI; } InterfaceTable[] = { {&CLSID_ShellFSFolder, &IFSFolder_Constructor}, {&CLSID_MyComputer, &ISF_MyComputer_Constructor}, {&CLSID_ShellDesktop, &ISF_Desktop_Constructor}, {&CLSID_ShellLink, &IShellLink_Constructor}, {&CLSID_DragDropHelper, &IDropTargetHelper_Constructor}, {&CLSID_ControlPanel, &IControlPanel_Constructor}, {&CLSID_AutoComplete, &IAutoComplete_Constructor}, {&CLSID_UnixFolder, &UnixFolder_Constructor}, {&CLSID_UnixDosFolder, &UnixDosFolder_Constructor}, {&CLSID_FolderShortcut, &FolderShortcut_Constructor}, {&CLSID_MyDocuments, &MyDocuments_Constructor}, {NULL,NULL} }; /************************************************************************* * SHCoCreateInstance [SHELL32.102] * * NOTES * exported by ordinal */ /* FIXME: this should be SHLWAPI.24 since we can't yet import by ordinal */ DWORD WINAPI __SHGUIDToStringW (REFGUID guid, LPWSTR str) { WCHAR sFormat[52] = {'{','%','0','8','l','x','-','%','0','4', 'x','-','%','0','4','x','-','%','0','2', 'x','%','0','2','x','-','%','0','2','x', '%','0','2','x','%','0','2','x','%','0', '2','x','%','0','2','x','%','0','2','x', '}','\0'}; return wsprintfW ( str, sFormat, guid->Data1, guid->Data2, guid->Data3, guid->Data4[0], guid->Data4[1], guid->Data4[2], guid->Data4[3], guid->Data4[4], guid->Data4[5], guid->Data4[6], guid->Data4[7] ); } /************************************************************************/ HRESULT WINAPI SHCoCreateInstance( LPCWSTR aclsid, const CLSID *clsid, LPUNKNOWN pUnkOuter, REFIID refiid, LPVOID *ppv) { DWORD hres; IID iid; CLSID * myclsid = (CLSID*)clsid; WCHAR sKeyName[MAX_PATH]; const WCHAR sCLSID[7] = {'C','L','S','I','D','\\','\0'}; WCHAR sClassID[60]; const WCHAR sInProcServer32[16] ={'\\','I','n','p','r','o','c','S','e','r','v','e','r','3','2','\0'}; const WCHAR sLoadWithoutCOM[15] ={'L','o','a','d','W','i','t','h','o','u','t','C','O','M','\0'}; WCHAR sDllPath[MAX_PATH]; HKEY hKey; DWORD dwSize; BOOLEAN bLoadFromShell32 = FALSE; BOOLEAN bLoadWithoutCOM = FALSE; IClassFactory * pcf = NULL; if(!ppv) return E_POINTER; *ppv=NULL; /* if the clsid is a string, convert it */ if (!clsid) { if (!aclsid) return REGDB_E_CLASSNOTREG; SHCLSIDFromStringW(aclsid, &iid); myclsid = &iid; } TRACE("(%p,%s,unk:%p,%s,%p)\n", aclsid,shdebugstr_guid(myclsid),pUnkOuter,shdebugstr_guid(refiid),ppv); /* we look up the dll path in the registry */ __SHGUIDToStringW(myclsid, sClassID); lstrcpyW(sKeyName, sCLSID); lstrcatW(sKeyName, sClassID); lstrcatW(sKeyName, sInProcServer32); if (ERROR_SUCCESS == RegOpenKeyExW(HKEY_CLASSES_ROOT, sKeyName, 0, KEY_READ, &hKey)) { dwSize = sizeof(sDllPath); SHQueryValueExW(hKey, NULL, 0,0, sDllPath, &dwSize ); /* if a special registry key is set, we load a shell extension without help of OLE32 */ bLoadWithoutCOM = (ERROR_SUCCESS == SHQueryValueExW(hKey, sLoadWithoutCOM, 0, 0, 0, 0)); /* if the com object is inside shell32, omit use of ole32 */ bLoadFromShell32 = (0==lstrcmpiW( PathFindFileNameW(sDllPath), sShell32)); RegCloseKey (hKey); } else { /* since we can't find it in the registry we try internally */ bLoadFromShell32 = TRUE; } TRACE("WithoutCom=%u FromShell=%u\n", bLoadWithoutCOM, bLoadFromShell32); /* now we create an instance */ if (bLoadFromShell32) { if (! SUCCEEDED(DllGetClassObject(myclsid, &IID_IClassFactory,(LPVOID*)&pcf))) { ERR("LoadFromShell failed for CLSID=%s\n", shdebugstr_guid(myclsid)); } } else if (bLoadWithoutCOM) { /* load an external dll without ole32 */ HANDLE hLibrary; typedef HRESULT (CALLBACK *DllGetClassObjectFunc)(REFCLSID clsid, REFIID iid, LPVOID *ppv); DllGetClassObjectFunc DllGetClassObject; if ((hLibrary = LoadLibraryExW(sDllPath, 0, LOAD_WITH_ALTERED_SEARCH_PATH)) == 0) { ERR("couldn't load InprocServer32 dll %s\n", debugstr_w(sDllPath)); hres = E_ACCESSDENIED; goto end; } else if (!(DllGetClassObject = (DllGetClassObjectFunc)GetProcAddress(hLibrary, "DllGetClassObject"))) { ERR("couldn't find function DllGetClassObject in %s\n", debugstr_w(sDllPath)); FreeLibrary( hLibrary ); hres = E_ACCESSDENIED; goto end; } else if (! SUCCEEDED(hres = DllGetClassObject(myclsid, &IID_IClassFactory, (LPVOID*)&pcf))) { TRACE("GetClassObject failed 0x%08lx\n", hres); goto end; } } else { /* load an external dll in the usual way */ hres = CoCreateInstance(myclsid, pUnkOuter, CLSCTX_INPROC_SERVER, refiid, ppv); goto end; } /* here we should have a ClassFactory */ if (!pcf) return E_ACCESSDENIED; hres = IClassFactory_CreateInstance(pcf, pUnkOuter, refiid, ppv); IClassFactory_Release(pcf); end: if(hres!=S_OK) { ERR("failed (0x%08lx) to create CLSID:%s IID:%s\n", hres, shdebugstr_guid(myclsid), shdebugstr_guid(refiid)); ERR("class not found in registry\n"); } TRACE("-- instance: %p\n",*ppv); return hres; } /************************************************************************* * DllGetClassObject [SHELL32.@] */ HRESULT WINAPI DllGetClassObject(REFCLSID rclsid, REFIID iid, LPVOID *ppv) { HRESULT hres = E_OUTOFMEMORY; IClassFactory * pcf = NULL; int i; TRACE("CLSID:%s,IID:%s\n",shdebugstr_guid(rclsid),shdebugstr_guid(iid)); if (!ppv) return E_INVALIDARG; *ppv = NULL; /* search our internal interface table */ for(i=0;InterfaceTable[i].riid;i++) { if(IsEqualIID(InterfaceTable[i].riid, rclsid)) { TRACE("index[%u]\n", i); pcf = IDefClF_fnConstructor(InterfaceTable[i].lpfnCI, NULL, NULL); } } if (!pcf) { FIXME("failed for CLSID=%s\n", shdebugstr_guid(rclsid)); return CLASS_E_CLASSNOTAVAILABLE; } hres = IClassFactory_QueryInterface(pcf, iid, ppv); IClassFactory_Release(pcf); TRACE("-- pointer to class factory: %p\n",*ppv); return hres; } /************************************************************************* * SHCLSIDFromString [SHELL32.147] * * NOTES * exported by ordinal */ DWORD WINAPI SHCLSIDFromStringA (LPCSTR clsid, CLSID *id) { WCHAR buffer[40]; TRACE("(%p(%s) %p)\n", clsid, clsid, id); if (!MultiByteToWideChar( CP_ACP, 0, clsid, -1, buffer, sizeof(buffer)/sizeof(WCHAR) )) return CO_E_CLASSSTRING; return CLSIDFromString( buffer, id ); } DWORD WINAPI SHCLSIDFromStringW (LPCWSTR clsid, CLSID *id) { TRACE("(%p(%s) %p)\n", clsid, debugstr_w(clsid), id); return CLSIDFromString((LPWSTR)clsid, id); } DWORD WINAPI SHCLSIDFromStringAW (LPVOID clsid, CLSID *id) { if (SHELL_OsIsUnicode()) return SHCLSIDFromStringW (clsid, id); return SHCLSIDFromStringA (clsid, id); } /************************************************************************* * Shell Memory Allocator */ /* set the vtable later */ static const IMallocVtbl VT_Shell_IMalloc32; /* this is the static object instance */ typedef struct { const IMallocVtbl *lpVtbl; DWORD dummy; } _ShellMalloc; static _ShellMalloc Shell_Malloc = { &VT_Shell_IMalloc32,1}; /* this is the global allocator of shell32 */ static IMalloc * ShellTaskAllocator = NULL; /****************************************************************************** * IShellMalloc_QueryInterface [VTABLE] */ static HRESULT WINAPI IShellMalloc_fnQueryInterface(LPMALLOC iface, REFIID refiid, LPVOID *obj) { TRACE("(%s,%p)\n",shdebugstr_guid(refiid),obj); if (IsEqualIID(refiid, &IID_IUnknown) || IsEqualIID(refiid, &IID_IMalloc)) { *obj = (LPMALLOC) &Shell_Malloc; return S_OK; } return E_NOINTERFACE; } /****************************************************************************** * IShellMalloc_AddRefRelease [VTABLE] */ static ULONG WINAPI IShellMalloc_fnAddRefRelease(LPMALLOC iface) { return 1; } /****************************************************************************** * IShellMalloc_Alloc [VTABLE] */ static LPVOID WINAPI IShellMalloc_fnAlloc(LPMALLOC iface, DWORD cb) { LPVOID addr; addr = (LPVOID) LocalAlloc(LMEM_ZEROINIT, cb); TRACE("(%p,%ld);\n",addr,cb); return addr; } /****************************************************************************** * IShellMalloc_Realloc [VTABLE] */ static LPVOID WINAPI IShellMalloc_fnRealloc(LPMALLOC iface, LPVOID pv, DWORD cb) { LPVOID addr; if (pv) { if (cb) { addr = (LPVOID) LocalReAlloc((HANDLE) pv, cb, LMEM_ZEROINIT | LMEM_MOVEABLE); } else { LocalFree((HANDLE) pv); addr = NULL; } } else { if (cb) { addr = (LPVOID) LocalAlloc(LMEM_ZEROINIT, cb); } else { addr = NULL; } } TRACE("(%p->%p,%ld)\n",pv,addr,cb); return addr; } /****************************************************************************** * IShellMalloc_Free [VTABLE] */ static VOID WINAPI IShellMalloc_fnFree(LPMALLOC iface, LPVOID pv) { TRACE("(%p)\n",pv); LocalFree((HANDLE) pv); } /****************************************************************************** * IShellMalloc_GetSize [VTABLE] */ static DWORD WINAPI IShellMalloc_fnGetSize(LPMALLOC iface, LPVOID pv) { DWORD cb = (DWORD) LocalSize((HANDLE)pv); TRACE("(%p,%ld)\n", pv, cb); return cb; } /****************************************************************************** * IShellMalloc_DidAlloc [VTABLE] */ static INT WINAPI IShellMalloc_fnDidAlloc(LPMALLOC iface, LPVOID pv) { TRACE("(%p)\n",pv); return -1; } /****************************************************************************** * IShellMalloc_HeapMinimize [VTABLE] */ static VOID WINAPI IShellMalloc_fnHeapMinimize(LPMALLOC iface) { TRACE("()\n"); } static const IMallocVtbl VT_Shell_IMalloc32 = { IShellMalloc_fnQueryInterface, IShellMalloc_fnAddRefRelease, IShellMalloc_fnAddRefRelease, IShellMalloc_fnAlloc, IShellMalloc_fnRealloc, IShellMalloc_fnFree, IShellMalloc_fnGetSize, IShellMalloc_fnDidAlloc, IShellMalloc_fnHeapMinimize }; /************************************************************************* * SHGetMalloc [SHELL32.@] * * Return the shell IMalloc interface. * * PARAMS * lpmal [O] Destination for IMalloc interface. * * RETURNS * Success: S_OK. lpmal contains the shells IMalloc interface. * Failure. An HRESULT error code. * * NOTES * This function will use CoGetMalloc() if OLE32.DLL is already loaded. * If not it uses an internal implementation as a fallback. */ HRESULT WINAPI SHGetMalloc(LPMALLOC *lpmal) { TRACE("(%p)\n", lpmal); if (!ShellTaskAllocator) { HMODULE hOle32 = GetModuleHandleA("OLE32.DLL"); /* this is very suspect. we should not being using a different * allocator from deallocator based on something undeterministic * like whether ole32 is loaded. as it happens currently, they * both map to the same allocator deep down, but this could * change in the future. */ if(hOle32) { CoGetMalloc(MEMCTX_TASK, &ShellTaskAllocator); TRACE("got ole32 IMalloc\n"); } if(!ShellTaskAllocator) { ShellTaskAllocator = (IMalloc* ) &Shell_Malloc; TRACE("use fallback allocator\n"); } } *lpmal = ShellTaskAllocator; return S_OK; } /************************************************************************* * SHAlloc [SHELL32.196] * * NOTES * exported by ordinal */ LPVOID WINAPI SHAlloc(DWORD len) { IMalloc * ppv; LPBYTE ret; if (!ShellTaskAllocator) SHGetMalloc(&ppv); ret = (LPVOID) IMalloc_Alloc(ShellTaskAllocator, len); TRACE("%lu bytes at %p\n",len, ret); return (LPVOID)ret; } /************************************************************************* * SHFree [SHELL32.195] * * NOTES * exported by ordinal */ void WINAPI SHFree(LPVOID pv) { IMalloc * ppv; TRACE("%p\n",pv); if (!ShellTaskAllocator) SHGetMalloc(&ppv); IMalloc_Free(ShellTaskAllocator, pv); } /************************************************************************* * SHGetDesktopFolder [SHELL32.@] */ HRESULT WINAPI SHGetDesktopFolder(IShellFolder **psf) { HRESULT hres = S_OK; TRACE("\n"); if(!psf) return E_INVALIDARG; *psf = NULL; hres = ISF_Desktop_Constructor(NULL, &IID_IShellFolder,(LPVOID*)psf); TRACE("-- %p->(%p)\n",psf, *psf); return hres; } /************************************************************************** * Default ClassFactory Implementation * * SHCreateDefClassObject * * NOTES * Helper function for dlls without their own classfactory. * A generic classfactory is returned. * When the CreateInstance of the cf is called the callback is executed. */ typedef struct { const IClassFactoryVtbl *lpVtbl; LONG ref; CLSID *rclsid; LPFNCREATEINSTANCE lpfnCI; const IID * riidInst; LONG * pcRefDll; /* pointer to refcounter in external dll (ugrrr...) */ } IDefClFImpl; static const IClassFactoryVtbl dclfvt; /************************************************************************** * IDefClF_fnConstructor */ IClassFactory * IDefClF_fnConstructor(LPFNCREATEINSTANCE lpfnCI, PLONG pcRefDll, REFIID riidInst) { IDefClFImpl* lpclf; lpclf = HeapAlloc(GetProcessHeap(),0,sizeof(IDefClFImpl)); lpclf->ref = 1; lpclf->lpVtbl = &dclfvt; lpclf->lpfnCI = lpfnCI; lpclf->pcRefDll = pcRefDll; if (pcRefDll) InterlockedIncrement(pcRefDll); lpclf->riidInst = riidInst; TRACE("(%p)%s\n",lpclf, shdebugstr_guid(riidInst)); return (LPCLASSFACTORY)lpclf; } /************************************************************************** * IDefClF_fnQueryInterface */ static HRESULT WINAPI IDefClF_fnQueryInterface( LPCLASSFACTORY iface, REFIID riid, LPVOID *ppvObj) { IDefClFImpl *This = (IDefClFImpl *)iface; TRACE("(%p)->(%s)\n",This,shdebugstr_guid(riid)); *ppvObj = NULL; if(IsEqualIID(riid, &IID_IUnknown) || IsEqualIID(riid, &IID_IClassFactory)) { *ppvObj = This; InterlockedIncrement(&This->ref); return S_OK; } TRACE("-- E_NOINTERFACE\n"); return E_NOINTERFACE; } /****************************************************************************** * IDefClF_fnAddRef */ static ULONG WINAPI IDefClF_fnAddRef(LPCLASSFACTORY iface) { IDefClFImpl *This = (IDefClFImpl *)iface; ULONG refCount = InterlockedIncrement(&This->ref); TRACE("(%p)->(count=%lu)\n", This, refCount - 1); return refCount; } /****************************************************************************** * IDefClF_fnRelease */ static ULONG WINAPI IDefClF_fnRelease(LPCLASSFACTORY iface) { IDefClFImpl *This = (IDefClFImpl *)iface; ULONG refCount = InterlockedDecrement(&This->ref); TRACE("(%p)->(count=%lu)\n", This, refCount + 1); if (!refCount) { if (This->pcRefDll) InterlockedDecrement(This->pcRefDll); TRACE("-- destroying IClassFactory(%p)\n",This); HeapFree(GetProcessHeap(),0,This); return 0; } return refCount; } /****************************************************************************** * IDefClF_fnCreateInstance */ static HRESULT WINAPI IDefClF_fnCreateInstance( LPCLASSFACTORY iface, LPUNKNOWN pUnkOuter, REFIID riid, LPVOID *ppvObject) { IDefClFImpl *This = (IDefClFImpl *)iface; TRACE("%p->(%p,%s,%p)\n",This,pUnkOuter,shdebugstr_guid(riid),ppvObject); *ppvObject = NULL; if ( This->riidInst==NULL || IsEqualCLSID(riid, This->riidInst) || IsEqualCLSID(riid, &IID_IUnknown) ) { return This->lpfnCI(pUnkOuter, riid, ppvObject); } ERR("unknown IID requested %s\n",shdebugstr_guid(riid)); return E_NOINTERFACE; } /****************************************************************************** * IDefClF_fnLockServer */ static HRESULT WINAPI IDefClF_fnLockServer(LPCLASSFACTORY iface, BOOL fLock) { IDefClFImpl *This = (IDefClFImpl *)iface; TRACE("%p->(0x%x), not implemented\n",This, fLock); return E_NOTIMPL; } static const IClassFactoryVtbl dclfvt = { IDefClF_fnQueryInterface, IDefClF_fnAddRef, IDefClF_fnRelease, IDefClF_fnCreateInstance, IDefClF_fnLockServer }; /****************************************************************************** * SHCreateDefClassObject [SHELL32.70] */ HRESULT WINAPI SHCreateDefClassObject( REFIID riid, LPVOID* ppv, LPFNCREATEINSTANCE lpfnCI, /* [in] create instance callback entry */ LPDWORD pcRefDll, /* [in/out] ref count of the dll */ REFIID riidInst) /* [in] optional interface to the instance */ { IClassFactory * pcf; TRACE("%s %p %p %p %s\n", shdebugstr_guid(riid), ppv, lpfnCI, pcRefDll, shdebugstr_guid(riidInst)); if (! IsEqualCLSID(riid, &IID_IClassFactory) ) return E_NOINTERFACE; if (! (pcf = IDefClF_fnConstructor(lpfnCI, (PLONG)pcRefDll, riidInst))) return E_OUTOFMEMORY; *ppv = pcf; return NOERROR; } /************************************************************************* * DragAcceptFiles [SHELL32.@] */ void WINAPI DragAcceptFiles(HWND hWnd, BOOL b) { LONG exstyle; if( !IsWindow(hWnd) ) return; exstyle = GetWindowLongA(hWnd,GWL_EXSTYLE); if (b) exstyle |= WS_EX_ACCEPTFILES; else exstyle &= ~WS_EX_ACCEPTFILES; SetWindowLongA(hWnd,GWL_EXSTYLE,exstyle); } /************************************************************************* * DragFinish [SHELL32.@] */ void WINAPI DragFinish(HDROP h) { TRACE("\n"); GlobalFree((HGLOBAL)h); } /************************************************************************* * DragQueryPoint [SHELL32.@] */ BOOL WINAPI DragQueryPoint(HDROP hDrop, POINT *p) { DROPFILES *lpDropFileStruct; BOOL bRet; TRACE("\n"); lpDropFileStruct = (DROPFILES *) GlobalLock(hDrop); *p = lpDropFileStruct->pt; bRet = lpDropFileStruct->fNC; GlobalUnlock(hDrop); return bRet; } /************************************************************************* * DragQueryFile [SHELL32.@] * DragQueryFileA [SHELL32.@] */ UINT WINAPI DragQueryFileA( HDROP hDrop, UINT lFile, LPSTR lpszFile, UINT lLength) { LPSTR lpDrop; UINT i = 0; DROPFILES *lpDropFileStruct = (DROPFILES *) GlobalLock(hDrop); TRACE("(%p, %x, %p, %u)\n", hDrop,lFile,lpszFile,lLength); if(!lpDropFileStruct) goto end; lpDrop = (LPSTR) lpDropFileStruct + lpDropFileStruct->pFiles; if(lpDropFileStruct->fWide) { LPWSTR lpszFileW = NULL; if(lpszFile) { lpszFileW = HeapAlloc(GetProcessHeap(), 0, lLength*sizeof(WCHAR)); if(lpszFileW == NULL) { goto end; } } i = DragQueryFileW(hDrop, lFile, lpszFileW, lLength); if(lpszFileW) { WideCharToMultiByte(CP_ACP, 0, lpszFileW, -1, lpszFile, lLength, 0, NULL); HeapFree(GetProcessHeap(), 0, lpszFileW); } goto end; } while (i++ < lFile) { while (*lpDrop++); /* skip filename */ if (!*lpDrop) { i = (lFile == 0xFFFFFFFF) ? i : 0; goto end; } } i = strlen(lpDrop); i++; if (!lpszFile ) goto end; /* needed buffer size */ i = (lLength > i) ? i : lLength; lstrcpynA (lpszFile, lpDrop, i); end: GlobalUnlock(hDrop); return i; } /************************************************************************* * DragQueryFileW [SHELL32.@] */ UINT WINAPI DragQueryFileW( HDROP hDrop, UINT lFile, LPWSTR lpszwFile, UINT lLength) { LPWSTR lpwDrop; UINT i = 0; DROPFILES *lpDropFileStruct = (DROPFILES *) GlobalLock(hDrop); TRACE("(%p, %x, %p, %u)\n", hDrop,lFile,lpszwFile,lLength); if(!lpDropFileStruct) goto end; lpwDrop = (LPWSTR) ((LPSTR)lpDropFileStruct + lpDropFileStruct->pFiles); if(lpDropFileStruct->fWide == FALSE) { LPSTR lpszFileA = NULL; if(lpszwFile) { lpszFileA = HeapAlloc(GetProcessHeap(), 0, lLength); if(lpszFileA == NULL) { goto end; } } i = DragQueryFileA(hDrop, lFile, lpszFileA, lLength); if(lpszFileA) { MultiByteToWideChar(CP_ACP, 0, lpszFileA, -1, lpszwFile, lLength); HeapFree(GetProcessHeap(), 0, lpszFileA); } goto end; } i = 0; while (i++ < lFile) { while (*lpwDrop++); /* skip filename */ if (!*lpwDrop) { i = (lFile == 0xFFFFFFFF) ? i : 0; goto end; } } i = strlenW(lpwDrop); i++; if ( !lpszwFile) goto end; /* needed buffer size */ i = (lLength > i) ? i : lLength; lstrcpynW (lpszwFile, lpwDrop, i); end: GlobalUnlock(hDrop); return i; }