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