dlls/shell32/shellole.c

   1 /*
   2  *      handling of SHELL32.DLL OLE-Objects
   3  *
   4  *      Copyright 1997  Marcus Meissner
   5  *      Copyright 1998  Juergen Schmied  <juergen.schmied@metronet.de>
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  20  */
  21
  22 #include "config.h"
  23
  24 #include <stdarg.h>
  25 #include <stdlib.h>
  26 #include <string.h>
  27
  28 #define COBJMACROS
  29
  30 #include "windef.h"
  31 #include "winbase.h"
  32 #include "shellapi.h"
  33 #include "wingdi.h"
  34 #include "winuser.h"
  35 #include "shlobj.h"
  36 #include "shlguid.h"
  37 #include "winreg.h"
  38 #include "winerror.h"
  39
  40 #include "undocshell.h"
  41 #include "wine/unicode.h"
  42 #include "shell32_main.h"
  43
  44 #include "wine/debug.h"
  45 #include "shlwapi.h"
  46 #include "debughlp.h"
  47
  48 WINE_DEFAULT_DEBUG_CHANNEL(shell);
  49
  50 extern HRESULT WINAPI IFSFolder_Constructor(IUnknown * pUnkOuter, REFIID riid, LPVOID * ppv);
  51
  52 /**************************************************************************
  53  * Default ClassFactory types
  54  */
  55 typedef HRESULT (CALLBACK *LPFNCREATEINSTANCE)(IUnknown* pUnkOuter, REFIID riid, LPVOID* ppvObject);
  56 static IClassFactory * IDefClF_fnConstructor(LPFNCREATEINSTANCE lpfnCI, PLONG pcRefDll, REFIID riidInst);
  57
  58 /* this table contains all CLSID's of shell32 objects */
  59 static const struct {
  60         REFIID                  riid;
  61         LPFNCREATEINSTANCE      lpfnCI;
  62 } InterfaceTable[] = {
  63         {&CLSID_ShellFSFolder,  IFSFolder_Constructor},
  64         {&CLSID_MyComputer,     ISF_MyComputer_Constructor},
  65         {&CLSID_NetworkPlaces,  ISF_NetworkPlaces_Constructor},
  66         {&CLSID_ShellDesktop,   ISF_Desktop_Constructor},
  67         {&CLSID_ShellLink,      IShellLink_Constructor},
  68         {&CLSID_DragDropHelper, IDropTargetHelper_Constructor},
  69         {&CLSID_ControlPanel,   IControlPanel_Constructor},
  70         {&CLSID_AutoComplete,   IAutoComplete_Constructor},
  71         {&CLSID_UnixFolder,     UnixFolder_Constructor},
  72         {&CLSID_UnixDosFolder,  UnixDosFolder_Constructor},
  73         {&CLSID_FolderShortcut, FolderShortcut_Constructor},
  74         {&CLSID_MyDocuments,    MyDocuments_Constructor},
  75         {&CLSID_RecycleBin,     RecycleBin_Constructor},
  76         {NULL,NULL}
  77 };
  78
  79
  80 /* FIXME: this should be SHLWAPI.24 since we can't yet import by ordinal */
  81
  82 DWORD WINAPI __SHGUIDToStringW (REFGUID guid, LPWSTR str)
  83 {
  84     WCHAR sFormat[52] = {'{','%','0','8','l','x','-','%','0','4',
  85                          'x','-','%','0','4','x','-','%','0','2',
  86                          'x','%','0','2','x','-','%','0','2','x',
  87                          '%','0','2','x','%','0','2','x','%','0',
  88                          '2','x','%','0','2','x','%','0','2','x',
  89                          '}','\0'};
  90
  91     return wsprintfW ( str, sFormat,
  92              guid->Data1, guid->Data2, guid->Data3,
  93              guid->Data4[0], guid->Data4[1], guid->Data4[2], guid->Data4[3],
  94              guid->Data4[4], guid->Data4[5], guid->Data4[6], guid->Data4[7] );
  95
  96 }
  97
  98 /*************************************************************************
  99  * SHCoCreateInstance [SHELL32.102]
 100  *
 101  * Equivalent to CoCreateInstance. Under Windows 9x this function could sometimes
 102  * use the shell32 built-in "mini-COM" without the need to load ole32.dll - see
 103  * SHLoadOLE for details.
 104  *
 105  * Under wine if a "LoadWithoutCOM" value is present or the object resides in
 106  * shell32.dll the function will load the object manually without the help of ole32
 107  *
 108  * NOTES
 109  *     exported by ordinal
 110  *
 111  * SEE ALSO
 112  *     CoCreateInstace, SHLoadOLE
 113  */
 114 HRESULT WINAPI SHCoCreateInstance(
 115         LPCWSTR aclsid,
 116         const CLSID *clsid,
 117         LPUNKNOWN pUnkOuter,
 118         REFIID refiid,
 119         LPVOID *ppv)
 120 {
 121         DWORD   hres;
 122         IID     iid;
 123         const   CLSID * myclsid = clsid;
 124         WCHAR   sKeyName[MAX_PATH];
 125         const   WCHAR sCLSID[7] = {'C','L','S','I','D','\\','\0'};
 126         WCHAR   sClassID[60];
 127         const WCHAR sInProcServer32[16] ={'\\','I','n','p','r','o','c','S','e','r','v','e','r','3','2','\0'};
 128         const WCHAR sLoadWithoutCOM[15] ={'L','o','a','d','W','i','t','h','o','u','t','C','O','M','\0'};
 129         WCHAR   sDllPath[MAX_PATH];
 130         HKEY    hKey = 0;
 131         DWORD   dwSize;
 132         IClassFactory * pcf = NULL;
 133
 134         if(!ppv) return E_POINTER;
 135         *ppv=NULL;
 136
 137         /* if the clsid is a string, convert it */
 138         if (!clsid)
 139         {
 140           if (!aclsid) return REGDB_E_CLASSNOTREG;
 141           SHCLSIDFromStringW(aclsid, &iid);
 142           myclsid = &iid;
 143         }
 144
 145         TRACE("(%p,%s,unk:%p,%s,%p)\n",
 146                 aclsid,shdebugstr_guid(myclsid),pUnkOuter,shdebugstr_guid(refiid),ppv);
 147
 148         if (SUCCEEDED(DllGetClassObject(myclsid, &IID_IClassFactory,(LPVOID*)&pcf)))
 149         {
 150             hres = IClassFactory_CreateInstance(pcf, pUnkOuter, refiid, ppv);
 151             IClassFactory_Release(pcf);
 152             goto end;
 153         }
 154
 155         /* we look up the dll path in the registry */
 156         __SHGUIDToStringW(myclsid, sClassID);
 157         lstrcpyW(sKeyName, sCLSID);
 158         lstrcatW(sKeyName, sClassID);
 159         lstrcatW(sKeyName, sInProcServer32);
 160
 161         if (RegOpenKeyExW(HKEY_CLASSES_ROOT, sKeyName, 0, KEY_READ, &hKey))
 162             return E_ACCESSDENIED;
 163
 164         /* if a special registry key is set, we load a shell extension without help of OLE32 */
 165         if (!SHQueryValueExW(hKey, sLoadWithoutCOM, 0, 0, 0, 0))
 166         {
 167             /* load an external dll without ole32 */
 168             HANDLE hLibrary;
 169             typedef HRESULT (CALLBACK *DllGetClassObjectFunc)(REFCLSID clsid, REFIID iid, LPVOID *ppv);
 170             DllGetClassObjectFunc DllGetClassObject;
 171
 172             dwSize = sizeof(sDllPath);
 173             SHQueryValueExW(hKey, NULL, 0,0, sDllPath, &dwSize );
 174
 175             if ((hLibrary = LoadLibraryExW(sDllPath, 0, LOAD_WITH_ALTERED_SEARCH_PATH)) == 0) {
 176                 ERR("couldn't load InprocServer32 dll %s\n", debugstr_w(sDllPath));
 177                 hres = E_ACCESSDENIED;
 178                 goto end;
 179             } else if (!(DllGetClassObject = (DllGetClassObjectFunc)GetProcAddress(hLibrary, "DllGetClassObject"))) {
 180                 ERR("couldn't find function DllGetClassObject in %s\n", debugstr_w(sDllPath));
 181                 FreeLibrary( hLibrary );
 182                 hres = E_ACCESSDENIED;
 183                 goto end;
 184             } else if (FAILED(hres = DllGetClassObject(myclsid, &IID_IClassFactory, (LPVOID*)&pcf))) {
 185                     TRACE("GetClassObject failed 0x%08x\n", hres);
 186                     goto end;
 187             }
 188
 189             hres = IClassFactory_CreateInstance(pcf, pUnkOuter, refiid, ppv);
 190             IClassFactory_Release(pcf);
 191         } else {
 192
 193             /* load an external dll in the usual way */
 194             hres = CoCreateInstance(myclsid, pUnkOuter, CLSCTX_INPROC_SERVER, refiid, ppv);
 195         }
 196
 197 end:
 198         if (hKey) RegCloseKey(hKey);
 199         if(hres!=S_OK)
 200         {
 201           ERR("failed (0x%08x) to create CLSID:%s IID:%s\n",
 202               hres, shdebugstr_guid(myclsid), shdebugstr_guid(refiid));
 203           ERR("class not found in registry\n");
 204         }
 205
 206         TRACE("-- instance: %p\n",*ppv);
 207         return hres;
 208 }
 209
 210 /*************************************************************************
 211  * DllGetClassObject     [SHELL32.@]
 212  * SHDllGetClassObject   [SHELL32.128]
 213  */
 214 HRESULT WINAPI DllGetClassObject(REFCLSID rclsid, REFIID iid, LPVOID *ppv)
 215 {
 216         HRESULT hres = E_OUTOFMEMORY;
 217         IClassFactory * pcf = NULL;
 218         int i;
 219
 220         TRACE("CLSID:%s,IID:%s\n",shdebugstr_guid(rclsid),shdebugstr_guid(iid));
 221
 222         if (!ppv) return E_INVALIDARG;
 223         *ppv = NULL;
 224
 225         /* search our internal interface table */
 226         for(i=0;InterfaceTable[i].riid;i++) {
 227             if(IsEqualIID(InterfaceTable[i].riid, rclsid)) {
 228                 TRACE("index[%u]\n", i);
 229                 pcf = IDefClF_fnConstructor(InterfaceTable[i].lpfnCI, NULL, NULL);
 230             }
 231         }
 232
 233         if (!pcf) {
 234             FIXME("failed for CLSID=%s\n", shdebugstr_guid(rclsid));
 235             return CLASS_E_CLASSNOTAVAILABLE;
 236         }
 237
 238         hres = IClassFactory_QueryInterface(pcf, iid, ppv);
 239         IClassFactory_Release(pcf);
 240
 241         TRACE("-- pointer to class factory: %p\n",*ppv);
 242         return hres;
 243 }
 244
 245 /*************************************************************************
 246  * SHCLSIDFromString                            [SHELL32.147]
 247  *
 248  * Under Windows 9x this was an ANSI version of CLSIDFromString. It also allowed
 249  * to avoid dependency on ole32.dll (see SHLoadOLE for details).
 250  *
 251  * Under Windows NT/2000/XP this is equivalent to CLSIDFromString
 252  *
 253  * NOTES
 254  *     exported by ordinal
 255  *
 256  * SEE ALSO
 257  *     CLSIDFromString, SHLoadOLE
 258  */
 259 DWORD WINAPI SHCLSIDFromStringA (LPCSTR clsid, CLSID *id)
 260 {
 261     WCHAR buffer[40];
 262     TRACE("(%p(%s) %p)\n", clsid, clsid, id);
 263     if (!MultiByteToWideChar( CP_ACP, 0, clsid, -1, buffer, sizeof(buffer)/sizeof(WCHAR) ))
 264         return CO_E_CLASSSTRING;
 265     return CLSIDFromString( buffer, id );
 266 }
 267 DWORD WINAPI SHCLSIDFromStringW (LPCWSTR clsid, CLSID *id)
 268 {
 269         TRACE("(%p(%s) %p)\n", clsid, debugstr_w(clsid), id);
 270         return CLSIDFromString((LPWSTR)clsid, id);
 271 }
 272 DWORD WINAPI SHCLSIDFromStringAW (LPCVOID clsid, CLSID *id)
 273 {
 274         if (SHELL_OsIsUnicode())
 275           return SHCLSIDFromStringW (clsid, id);
 276         return SHCLSIDFromStringA (clsid, id);
 277 }
 278
 279 /*************************************************************************
 280  *                       SHGetMalloc                    [SHELL32.@]
 281  *
 282  * Equivalent to CoGetMalloc(MEMCTX_TASK, ...). Under Windows 9x this function
 283  * could use the shell32 built-in "mini-COM" without the need to load ole32.dll -
 284  * see SHLoadOLE for details.
 285  *
 286  * PARAMS
 287  *  lpmal [O] Destination for IMalloc interface.
 288  *
 289  * RETURNS
 290  *  Success: S_OK. lpmal contains the shells IMalloc interface.
 291  *  Failure. An HRESULT error code.
 292  *
 293  * SEE ALSO
 294  *  CoGetMalloc, SHLoadOLE
 295  */
 296 HRESULT WINAPI SHGetMalloc(LPMALLOC *lpmal)
 297 {
 298         TRACE("(%p)\n", lpmal);
 299         return CoGetMalloc(MEMCTX_TASK, lpmal);
 300 }
 301
 302 /*************************************************************************
 303  * SHAlloc                                      [SHELL32.196]
 304  *
 305  * Equivalent to CoTaskMemAlloc. Under Windows 9x this function could use
 306  * the shell32 built-in "mini-COM" without the need to load ole32.dll -
 307  * see SHLoadOLE for details.
 308  *
 309  * NOTES
 310  *     exported by ordinal
 311  *
 312  * SEE ALSO
 313  *     CoTaskMemAlloc, SHLoadOLE
 314  */
 315 LPVOID WINAPI SHAlloc(DWORD len)
 316 {
 317         LPVOID ret;
 318
 319         ret = CoTaskMemAlloc(len);
 320         TRACE("%u bytes at %p\n",len, ret);
 321         return ret;
 322 }
 323
 324 /*************************************************************************
 325  * SHFree                                       [SHELL32.195]
 326  *
 327  * Equivalent to CoTaskMemFree. Under Windows 9x this function could use
 328  * the shell32 built-in "mini-COM" without the need to load ole32.dll -
 329  * see SHLoadOLE for details.
 330  *
 331  * NOTES
 332  *     exported by ordinal
 333  *
 334  * SEE ALSO
 335  *     CoTaskMemFree, SHLoadOLE
 336  */
 337 void WINAPI SHFree(LPVOID pv)
 338 {
 339         TRACE("%p\n",pv);
 340         CoTaskMemFree(pv);
 341 }
 342
 343 /*************************************************************************
 344  * SHGetDesktopFolder                   [SHELL32.@]
 345  */
 346 HRESULT WINAPI SHGetDesktopFolder(IShellFolder **psf)
 347 {
 348         HRESULT hres = S_OK;
 349         TRACE("\n");
 350
 351         if(!psf) return E_INVALIDARG;
 352         *psf = NULL;
 353         hres = ISF_Desktop_Constructor(NULL, &IID_IShellFolder,(LPVOID*)psf);
 354
 355         TRACE("-- %p->(%p)\n",psf, *psf);
 356         return hres;
 357 }
 358 /**************************************************************************
 359  * Default ClassFactory Implementation
 360  *
 361  * SHCreateDefClassObject
 362  *
 363  * NOTES
 364  *  Helper function for dlls without their own classfactory.
 365  *  A generic classfactory is returned.
 366  *  When the CreateInstance of the cf is called the callback is executed.
 367  */
 368
 369 typedef struct
 370 {
 371     const IClassFactoryVtbl    *lpVtbl;
 372     LONG                        ref;
 373     CLSID                       *rclsid;
 374     LPFNCREATEINSTANCE          lpfnCI;
 375     const IID *                 riidInst;
 376     LONG *                      pcRefDll; /* pointer to refcounter in external dll (ugrrr...) */
 377 } IDefClFImpl;
 378
 379 static const IClassFactoryVtbl dclfvt;
 380
 381 /**************************************************************************
 382  *  IDefClF_fnConstructor
 383  */
 384
 385 static IClassFactory * IDefClF_fnConstructor(LPFNCREATEINSTANCE lpfnCI, PLONG pcRefDll, REFIID riidInst)
 386 {
 387         IDefClFImpl* lpclf;
 388
 389         lpclf = HeapAlloc(GetProcessHeap(),0,sizeof(IDefClFImpl));
 390         lpclf->ref = 1;
 391         lpclf->lpVtbl = &dclfvt;
 392         lpclf->lpfnCI = lpfnCI;
 393         lpclf->pcRefDll = pcRefDll;
 394
 395         if (pcRefDll) InterlockedIncrement(pcRefDll);
 396         lpclf->riidInst = riidInst;
 397
 398         TRACE("(%p)%s\n",lpclf, shdebugstr_guid(riidInst));
 399         return (LPCLASSFACTORY)lpclf;
 400 }
 401 /**************************************************************************
 402  *  IDefClF_fnQueryInterface
 403  */
 404 static HRESULT WINAPI IDefClF_fnQueryInterface(
 405   LPCLASSFACTORY iface, REFIID riid, LPVOID *ppvObj)
 406 {
 407         IDefClFImpl *This = (IDefClFImpl *)iface;
 408
 409         TRACE("(%p)->(%s)\n",This,shdebugstr_guid(riid));
 410
 411         *ppvObj = NULL;
 412
 413         if(IsEqualIID(riid, &IID_IUnknown) || IsEqualIID(riid, &IID_IClassFactory)) {
 414           *ppvObj = This;
 415           InterlockedIncrement(&This->ref);
 416           return S_OK;
 417         }
 418
 419         TRACE("-- E_NOINTERFACE\n");
 420         return E_NOINTERFACE;
 421 }
 422 /******************************************************************************
 423  * IDefClF_fnAddRef
 424  */
 425 static ULONG WINAPI IDefClF_fnAddRef(LPCLASSFACTORY iface)
 426 {
 427         IDefClFImpl *This = (IDefClFImpl *)iface;
 428         ULONG refCount = InterlockedIncrement(&This->ref);
 429
 430         TRACE("(%p)->(count=%u)\n", This, refCount - 1);
 431
 432         return refCount;
 433 }
 434 /******************************************************************************
 435  * IDefClF_fnRelease
 436  */
 437 static ULONG WINAPI IDefClF_fnRelease(LPCLASSFACTORY iface)
 438 {
 439         IDefClFImpl *This = (IDefClFImpl *)iface;
 440         ULONG refCount = InterlockedDecrement(&This->ref);
 441
 442         TRACE("(%p)->(count=%u)\n", This, refCount + 1);
 443
 444         if (!refCount)
 445         {
 446           if (This->pcRefDll) InterlockedDecrement(This->pcRefDll);
 447
 448           TRACE("-- destroying IClassFactory(%p)\n",This);
 449           HeapFree(GetProcessHeap(),0,This);
 450           return 0;
 451         }
 452         return refCount;
 453 }
 454 /******************************************************************************
 455  * IDefClF_fnCreateInstance
 456  */
 457 static HRESULT WINAPI IDefClF_fnCreateInstance(
 458   LPCLASSFACTORY iface, LPUNKNOWN pUnkOuter, REFIID riid, LPVOID *ppvObject)
 459 {
 460         IDefClFImpl *This = (IDefClFImpl *)iface;
 461
 462         TRACE("%p->(%p,%s,%p)\n",This,pUnkOuter,shdebugstr_guid(riid),ppvObject);
 463
 464         *ppvObject = NULL;
 465
 466         if ( This->riidInst==NULL ||
 467              IsEqualCLSID(riid, This->riidInst) ||
 468              IsEqualCLSID(riid, &IID_IUnknown) )
 469         {
 470           return This->lpfnCI(pUnkOuter, riid, ppvObject);
 471         }
 472
 473         ERR("unknown IID requested %s\n",shdebugstr_guid(riid));
 474         return E_NOINTERFACE;
 475 }
 476 /******************************************************************************
 477  * IDefClF_fnLockServer
 478  */
 479 static HRESULT WINAPI IDefClF_fnLockServer(LPCLASSFACTORY iface, BOOL fLock)
 480 {
 481         IDefClFImpl *This = (IDefClFImpl *)iface;
 482         TRACE("%p->(0x%x), not implemented\n",This, fLock);
 483         return E_NOTIMPL;
 484 }
 485
 486 static const IClassFactoryVtbl dclfvt =
 487 {
 488     IDefClF_fnQueryInterface,
 489     IDefClF_fnAddRef,
 490   IDefClF_fnRelease,
 491   IDefClF_fnCreateInstance,
 492   IDefClF_fnLockServer
 493 };
 494
 495 /******************************************************************************
 496  * SHCreateDefClassObject                       [SHELL32.70]
 497  */
 498 HRESULT WINAPI SHCreateDefClassObject(
 499         REFIID  riid,
 500         LPVOID* ppv,
 501         LPFNCREATEINSTANCE lpfnCI,      /* [in] create instance callback entry */
 502         LPDWORD pcRefDll,               /* [in/out] ref count of the dll */
 503         REFIID  riidInst)               /* [in] optional interface to the instance */
 504 {
 505         IClassFactory * pcf;
 506
 507         TRACE("%s %p %p %p %s\n",
 508               shdebugstr_guid(riid), ppv, lpfnCI, pcRefDll, shdebugstr_guid(riidInst));
 509
 510         if (! IsEqualCLSID(riid, &IID_IClassFactory) ) return E_NOINTERFACE;
 511         if (! (pcf = IDefClF_fnConstructor(lpfnCI, (PLONG)pcRefDll, riidInst))) return E_OUTOFMEMORY;
 512         *ppv = pcf;
 513         return NOERROR;
 514 }
 515
 516 /*************************************************************************
 517  *  DragAcceptFiles             [SHELL32.@]
 518  */
 519 void WINAPI DragAcceptFiles(HWND hWnd, BOOL b)
 520 {
 521         LONG exstyle;
 522
 523         if( !IsWindow(hWnd) ) return;
 524         exstyle = GetWindowLongA(hWnd,GWL_EXSTYLE);
 525         if (b)
 526           exstyle |= WS_EX_ACCEPTFILES;
 527         else
 528           exstyle &= ~WS_EX_ACCEPTFILES;
 529         SetWindowLongA(hWnd,GWL_EXSTYLE,exstyle);
 530 }
 531
 532 /*************************************************************************
 533  * DragFinish           [SHELL32.@]
 534  */
 535 void WINAPI DragFinish(HDROP h)
 536 {
 537         TRACE("\n");
 538         GlobalFree((HGLOBAL)h);
 539 }
 540
 541 /*************************************************************************
 542  * DragQueryPoint               [SHELL32.@]
 543  */
 544 BOOL WINAPI DragQueryPoint(HDROP hDrop, POINT *p)
 545 {
 546         DROPFILES *lpDropFileStruct;
 547         BOOL bRet;
 548
 549         TRACE("\n");
 550
 551         lpDropFileStruct = GlobalLock(hDrop);
 552
 553         *p = lpDropFileStruct->pt;
 554         bRet = lpDropFileStruct->fNC;
 555
 556         GlobalUnlock(hDrop);
 557         return bRet;
 558 }
 559
 560 /*************************************************************************
 561  *  DragQueryFileA              [SHELL32.@]
 562  *  DragQueryFile               [SHELL32.@]
 563  */
 564 UINT WINAPI DragQueryFileA(
 565         HDROP hDrop,
 566         UINT lFile,
 567         LPSTR lpszFile,
 568         UINT lLength)
 569 {
 570         LPSTR lpDrop;
 571         UINT i = 0;
 572         DROPFILES *lpDropFileStruct = GlobalLock(hDrop);
 573
 574         TRACE("(%p, %x, %p, %u)\n",     hDrop,lFile,lpszFile,lLength);
 575
 576         if(!lpDropFileStruct) goto end;
 577
 578         lpDrop = (LPSTR) lpDropFileStruct + lpDropFileStruct->pFiles;
 579
 580         if(lpDropFileStruct->fWide) {
 581             LPWSTR lpszFileW = NULL;
 582
 583             if(lpszFile) {
 584                 lpszFileW = HeapAlloc(GetProcessHeap(), 0, lLength*sizeof(WCHAR));
 585                 if(lpszFileW == NULL) {
 586                     goto end;
 587                 }
 588             }
 589             i = DragQueryFileW(hDrop, lFile, lpszFileW, lLength);
 590
 591             if(lpszFileW) {
 592                 WideCharToMultiByte(CP_ACP, 0, lpszFileW, -1, lpszFile, lLength, 0, NULL);
 593                 HeapFree(GetProcessHeap(), 0, lpszFileW);
 594             }
 595             goto end;
 596         }
 597
 598         while (i++ < lFile)
 599         {
 600           while (*lpDrop++); /* skip filename */
 601           if (!*lpDrop)
 602           {
 603             i = (lFile == 0xFFFFFFFF) ? i : 0;
 604             goto end;
 605           }
 606         }
 607
 608         i = strlen(lpDrop);
 609         if (!lpszFile ) goto end;   /* needed buffer size */
 610         lstrcpynA (lpszFile, lpDrop, lLength);
 611 end:
 612         GlobalUnlock(hDrop);
 613         return i;
 614 }
 615
 616 /*************************************************************************
 617  *  DragQueryFileW              [SHELL32.@]
 618  */
 619 UINT WINAPI DragQueryFileW(
 620         HDROP hDrop,
 621         UINT lFile,
 622         LPWSTR lpszwFile,
 623         UINT lLength)
 624 {
 625         LPWSTR lpwDrop;
 626         UINT i = 0;
 627         DROPFILES *lpDropFileStruct = GlobalLock(hDrop);
 628
 629         TRACE("(%p, %x, %p, %u)\n", hDrop,lFile,lpszwFile,lLength);
 630
 631         if(!lpDropFileStruct) goto end;
 632
 633         lpwDrop = (LPWSTR) ((LPSTR)lpDropFileStruct + lpDropFileStruct->pFiles);
 634
 635         if(lpDropFileStruct->fWide == FALSE) {
 636             LPSTR lpszFileA = NULL;
 637
 638             if(lpszwFile) {
 639                 lpszFileA = HeapAlloc(GetProcessHeap(), 0, lLength);
 640                 if(lpszFileA == NULL) {
 641                     goto end;
 642                 }
 643             }
 644             i = DragQueryFileA(hDrop, lFile, lpszFileA, lLength);
 645
 646             if(lpszFileA) {
 647                 MultiByteToWideChar(CP_ACP, 0, lpszFileA, -1, lpszwFile, lLength);
 648                 HeapFree(GetProcessHeap(), 0, lpszFileA);
 649             }
 650             goto end;
 651         }
 652
 653         i = 0;
 654         while (i++ < lFile)
 655         {
 656           while (*lpwDrop++); /* skip filename */
 657           if (!*lpwDrop)
 658           {
 659             i = (lFile == 0xFFFFFFFF) ? i : 0;
 660             goto end;
 661           }
 662         }
 663
 664         i = strlenW(lpwDrop);
 665         if ( !lpszwFile) goto end;   /* needed buffer size */
 666         lstrcpynW (lpszwFile, lpwDrop, lLength);
 667 end:
 668         GlobalUnlock(hDrop);
 669         return i;
 670 }