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 HRESULT WINAPI IFSFolder_Constructor(IUnknown * pUnkOuter, REFIID riid, LPVOID * ppv);
  51
  52 static const WCHAR sShell32[12] = {'S','H','E','L','L','3','2','.','D','L','L','\0'};
  53
  54 /**************************************************************************
  55  * Default ClassFactory types
  56  */
  57 typedef HRESULT (CALLBACK *LPFNCREATEINSTANCE)(IUnknown* pUnkOuter, REFIID riid, LPVOID* ppvObject);
  58 static IClassFactory * IDefClF_fnConstructor(LPFNCREATEINSTANCE lpfnCI, PLONG pcRefDll, REFIID riidInst);
  59
  60 /* this table contains all CLSID's of shell32 objects */
  61 static const struct {
  62         REFIID                  riid;
  63         LPFNCREATEINSTANCE      lpfnCI;
  64 } InterfaceTable[] = {
  65         {&CLSID_ShellFSFolder,  &IFSFolder_Constructor},
  66         {&CLSID_MyComputer,     &ISF_MyComputer_Constructor},
  67         {&CLSID_ShellDesktop,   &ISF_Desktop_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 /* FIXME: this should be SHLWAPI.24 since we can't yet import by ordinal */
  82
  83 DWORD WINAPI __SHGUIDToStringW (REFGUID guid, LPWSTR str)
  84 {
  85     WCHAR sFormat[52] = {'{','%','0','8','l','x','-','%','0','4',
  86                          'x','-','%','0','4','x','-','%','0','2',
  87                          'x','%','0','2','x','-','%','0','2','x',
  88                          '%','0','2','x','%','0','2','x','%','0',
  89                          '2','x','%','0','2','x','%','0','2','x',
  90                          '}','\0'};
  91
  92     return wsprintfW ( str, sFormat,
  93              guid->Data1, guid->Data2, guid->Data3,
  94              guid->Data4[0], guid->Data4[1], guid->Data4[2], guid->Data4[3],
  95              guid->Data4[4], guid->Data4[5], guid->Data4[6], guid->Data4[7] );
  96
  97 }
  98
  99 /*************************************************************************
 100  * SHCoCreateInstance [SHELL32.102]
 101  *
 102  * Equivalent to CoCreateInstance. Under Windows 9x this function could sometimes
 103  * use the shell32 built-in "mini-COM" without the need to load ole32.dll - see
 104  * SHLoadOLE for details.
 105  *
 106  * Under wine if a "LoadWithoutCOM" value is present or the object resides in
 107  * shell32.dll the function will load the object manually without the help of ole32
 108  *
 109  * NOTES
 110  *     exported by ordinal
 111  *
 112  * SEE ALSO
 113  *     CoCreateInstace, SHLoadOLE
 114  */
 115 HRESULT WINAPI SHCoCreateInstance(
 116         LPCWSTR aclsid,
 117         const CLSID *clsid,
 118         LPUNKNOWN pUnkOuter,
 119         REFIID refiid,
 120         LPVOID *ppv)
 121 {
 122         DWORD   hres;
 123         IID     iid;
 124         const   CLSID * myclsid = clsid;
 125         WCHAR   sKeyName[MAX_PATH];
 126         const   WCHAR sCLSID[7] = {'C','L','S','I','D','\\','\0'};
 127         WCHAR   sClassID[60];
 128         const WCHAR sInProcServer32[16] ={'\\','I','n','p','r','o','c','S','e','r','v','e','r','3','2','\0'};
 129         const WCHAR sLoadWithoutCOM[15] ={'L','o','a','d','W','i','t','h','o','u','t','C','O','M','\0'};
 130         WCHAR   sDllPath[MAX_PATH];
 131         HKEY    hKey = 0;
 132         DWORD   dwSize;
 133         IClassFactory * pcf = NULL;
 134
 135         if(!ppv) return E_POINTER;
 136         *ppv=NULL;
 137
 138         /* if the clsid is a string, convert it */
 139         if (!clsid)
 140         {
 141           if (!aclsid) return REGDB_E_CLASSNOTREG;
 142           SHCLSIDFromStringW(aclsid, &iid);
 143           myclsid = &iid;
 144         }
 145
 146         TRACE("(%p,%s,unk:%p,%s,%p)\n",
 147                 aclsid,shdebugstr_guid(myclsid),pUnkOuter,shdebugstr_guid(refiid),ppv);
 148
 149         if (SUCCEEDED(DllGetClassObject(myclsid, &IID_IClassFactory,(LPVOID*)&pcf)))
 150         {
 151             hres = IClassFactory_CreateInstance(pcf, pUnkOuter, refiid, ppv);
 152             IClassFactory_Release(pcf);
 153             goto end;
 154         }
 155
 156         /* we look up the dll path in the registry */
 157         __SHGUIDToStringW(myclsid, sClassID);
 158         lstrcpyW(sKeyName, sCLSID);
 159         lstrcatW(sKeyName, sClassID);
 160         lstrcatW(sKeyName, sInProcServer32);
 161
 162         if (RegOpenKeyExW(HKEY_CLASSES_ROOT, sKeyName, 0, KEY_READ, &hKey))
 163             return E_ACCESSDENIED;
 164
 165         /* if a special registry key is set, we load a shell extension without help of OLE32 */
 166         if (!SHQueryValueExW(hKey, sLoadWithoutCOM, 0, 0, 0, 0))
 167         {
 168             /* load an external dll without ole32 */
 169             HANDLE hLibrary;
 170             typedef HRESULT (CALLBACK *DllGetClassObjectFunc)(REFCLSID clsid, REFIID iid, LPVOID *ppv);
 171             DllGetClassObjectFunc DllGetClassObject;
 172
 173             dwSize = sizeof(sDllPath);
 174             SHQueryValueExW(hKey, NULL, 0,0, sDllPath, &dwSize );
 175
 176             if ((hLibrary = LoadLibraryExW(sDllPath, 0, LOAD_WITH_ALTERED_SEARCH_PATH)) == 0) {
 177                 ERR("couldn't load InprocServer32 dll %s\n", debugstr_w(sDllPath));
 178                 hres = E_ACCESSDENIED;
 179                 goto end;
 180             } else if (!(DllGetClassObject = (DllGetClassObjectFunc)GetProcAddress(hLibrary, "DllGetClassObject"))) {
 181                 ERR("couldn't find function DllGetClassObject in %s\n", debugstr_w(sDllPath));
 182                 FreeLibrary( hLibrary );
 183                 hres = E_ACCESSDENIED;
 184                 goto end;
 185             } else if (! SUCCEEDED(hres = DllGetClassObject(myclsid, &IID_IClassFactory, (LPVOID*)&pcf))) {
 186                     TRACE("GetClassObject failed 0x%08x\n", hres);
 187                     goto end;
 188             }
 189
 190             hres = IClassFactory_CreateInstance(pcf, pUnkOuter, refiid, ppv);
 191             IClassFactory_Release(pcf);
 192         } else {
 193
 194             /* load an external dll in the usual way */
 195             hres = CoCreateInstance(myclsid, pUnkOuter, CLSCTX_INPROC_SERVER, refiid, ppv);
 196         }
 197
 198 end:
 199         if (hKey) RegCloseKey(hKey);
 200         if(hres!=S_OK)
 201         {
 202           ERR("failed (0x%08x) to create CLSID:%s IID:%s\n",
 203               hres, shdebugstr_guid(myclsid), shdebugstr_guid(refiid));
 204           ERR("class not found in registry\n");
 205         }
 206
 207         TRACE("-- instance: %p\n",*ppv);
 208         return hres;
 209 }
 210
 211 /*************************************************************************
 212  * DllGetClassObject     [SHELL32.@]
 213  * SHDllGetClassObject   [SHELL32.128]
 214  */
 215 HRESULT WINAPI DllGetClassObject(REFCLSID rclsid, REFIID iid, LPVOID *ppv)
 216 {
 217         HRESULT hres = E_OUTOFMEMORY;
 218         IClassFactory * pcf = NULL;
 219         int i;
 220
 221         TRACE("CLSID:%s,IID:%s\n",shdebugstr_guid(rclsid),shdebugstr_guid(iid));
 222
 223         if (!ppv) return E_INVALIDARG;
 224         *ppv = NULL;
 225
 226         /* search our internal interface table */
 227         for(i=0;InterfaceTable[i].riid;i++) {
 228             if(IsEqualIID(InterfaceTable[i].riid, rclsid)) {
 229                 TRACE("index[%u]\n", i);
 230                 pcf = IDefClF_fnConstructor(InterfaceTable[i].lpfnCI, NULL, NULL);
 231             }
 232         }
 233
 234         if (!pcf) {
 235             FIXME("failed for CLSID=%s\n", shdebugstr_guid(rclsid));
 236             return CLASS_E_CLASSNOTAVAILABLE;
 237         }
 238
 239         hres = IClassFactory_QueryInterface(pcf, iid, ppv);
 240         IClassFactory_Release(pcf);
 241
 242         TRACE("-- pointer to class factory: %p\n",*ppv);
 243         return hres;
 244 }
 245
 246 /*************************************************************************
 247  * SHCLSIDFromString                            [SHELL32.147]
 248  *
 249  * Under Windows 9x this was an ANSI version of CLSIDFromString. It also allowed
 250  * to avoid dependency on ole32.dll (see SHLoadOLE for details).
 251  *
 252  * Under Windows NT/2000/XP this is equivalent to CLSIDFromString
 253  *
 254  * NOTES
 255  *     exported by ordinal
 256  *
 257  * SEE ALSO
 258  *     CLSIDFromString, SHLoadOLE
 259  */
 260 DWORD WINAPI SHCLSIDFromStringA (LPCSTR clsid, CLSID *id)
 261 {
 262     WCHAR buffer[40];
 263     TRACE("(%p(%s) %p)\n", clsid, clsid, id);
 264     if (!MultiByteToWideChar( CP_ACP, 0, clsid, -1, buffer, sizeof(buffer)/sizeof(WCHAR) ))
 265         return CO_E_CLASSSTRING;
 266     return CLSIDFromString( buffer, id );
 267 }
 268 DWORD WINAPI SHCLSIDFromStringW (LPCWSTR clsid, CLSID *id)
 269 {
 270         TRACE("(%p(%s) %p)\n", clsid, debugstr_w(clsid), id);
 271         return CLSIDFromString((LPWSTR)clsid, id);
 272 }
 273 DWORD WINAPI SHCLSIDFromStringAW (LPCVOID clsid, CLSID *id)
 274 {
 275         if (SHELL_OsIsUnicode())
 276           return SHCLSIDFromStringW (clsid, id);
 277         return SHCLSIDFromStringA (clsid, id);
 278 }
 279
 280 /*************************************************************************
 281  *                       SHGetMalloc                    [SHELL32.@]
 282  *
 283  * Equivalent to CoGetMalloc(MEMCTX_TASK, ...). Under Windows 9x this function
 284  * could use the shell32 built-in "mini-COM" without the need to load ole32.dll -
 285  * see SHLoadOLE for details.
 286  *
 287  * PARAMS
 288  *  lpmal [O] Destination for IMalloc interface.
 289  *
 290  * RETURNS
 291  *  Success: S_OK. lpmal contains the shells IMalloc interface.
 292  *  Failure. An HRESULT error code.
 293  *
 294  * SEE ALSO
 295  *  CoGetMalloc, SHLoadOLE
 296  */
 297 HRESULT WINAPI SHGetMalloc(LPMALLOC *lpmal)
 298 {
 299         TRACE("(%p)\n", lpmal);
 300         return CoGetMalloc(MEMCTX_TASK, lpmal);
 301 }
 302
 303 /*************************************************************************
 304  * SHAlloc                                      [SHELL32.196]
 305  *
 306  * Equivalent to CoTaskMemAlloc. Under Windows 9x this function could use
 307  * the shell32 built-in "mini-COM" without the need to load ole32.dll -
 308  * see SHLoadOLE for details.
 309  *
 310  * NOTES
 311  *     exported by ordinal
 312  *
 313  * SEE ALSO
 314  *     CoTaskMemAlloc, SHLoadOLE
 315  */
 316 LPVOID WINAPI SHAlloc(DWORD len)
 317 {
 318         LPVOID ret;
 319
 320         ret = CoTaskMemAlloc(len);
 321         TRACE("%u bytes at %p\n",len, ret);
 322         return ret;
 323 }
 324
 325 /*************************************************************************
 326  * SHFree                                       [SHELL32.195]
 327  *
 328  * Equivalent to CoTaskMemFree. Under Windows 9x this function could use
 329  * the shell32 built-in "mini-COM" without the need to load ole32.dll -
 330  * see SHLoadOLE for details.
 331  *
 332  * NOTES
 333  *     exported by ordinal
 334  *
 335  * SEE ALSO
 336  *     CoTaskMemFree, SHLoadOLE
 337  */
 338 void WINAPI SHFree(LPVOID pv)
 339 {
 340         TRACE("%p\n",pv);
 341         CoTaskMemFree(pv);
 342 }
 343
 344 /*************************************************************************
 345  * SHGetDesktopFolder                   [SHELL32.@]
 346  */
 347 HRESULT WINAPI SHGetDesktopFolder(IShellFolder **psf)
 348 {
 349         HRESULT hres = S_OK;
 350         TRACE("\n");
 351
 352         if(!psf) return E_INVALIDARG;
 353         *psf = NULL;
 354         hres = ISF_Desktop_Constructor(NULL, &IID_IShellFolder,(LPVOID*)psf);
 355
 356         TRACE("-- %p->(%p)\n",psf, *psf);
 357         return hres;
 358 }
 359 /**************************************************************************
 360  * Default ClassFactory Implementation
 361  *
 362  * SHCreateDefClassObject
 363  *
 364  * NOTES
 365  *  Helper function for dlls without their own classfactory.
 366  *  A generic classfactory is returned.
 367  *  When the CreateInstance of the cf is called the callback is executed.
 368  */
 369
 370 typedef struct
 371 {
 372     const IClassFactoryVtbl    *lpVtbl;
 373     LONG                        ref;
 374     CLSID                       *rclsid;
 375     LPFNCREATEINSTANCE          lpfnCI;
 376     const IID *                 riidInst;
 377     LONG *                      pcRefDll; /* pointer to refcounter in external dll (ugrrr...) */
 378 } IDefClFImpl;
 379
 380 static const IClassFactoryVtbl dclfvt;
 381
 382 /**************************************************************************
 383  *  IDefClF_fnConstructor
 384  */
 385
 386 static IClassFactory * IDefClF_fnConstructor(LPFNCREATEINSTANCE lpfnCI, PLONG pcRefDll, REFIID riidInst)
 387 {
 388         IDefClFImpl* lpclf;
 389
 390         lpclf = HeapAlloc(GetProcessHeap(),0,sizeof(IDefClFImpl));
 391         lpclf->ref = 1;
 392         lpclf->lpVtbl = &dclfvt;
 393         lpclf->lpfnCI = lpfnCI;
 394         lpclf->pcRefDll = pcRefDll;
 395
 396         if (pcRefDll) InterlockedIncrement(pcRefDll);
 397         lpclf->riidInst = riidInst;
 398
 399         TRACE("(%p)%s\n",lpclf, shdebugstr_guid(riidInst));
 400         return (LPCLASSFACTORY)lpclf;
 401 }
 402 /**************************************************************************
 403  *  IDefClF_fnQueryInterface
 404  */
 405 static HRESULT WINAPI IDefClF_fnQueryInterface(
 406   LPCLASSFACTORY iface, REFIID riid, LPVOID *ppvObj)
 407 {
 408         IDefClFImpl *This = (IDefClFImpl *)iface;
 409
 410         TRACE("(%p)->(%s)\n",This,shdebugstr_guid(riid));
 411
 412         *ppvObj = NULL;
 413
 414         if(IsEqualIID(riid, &IID_IUnknown) || IsEqualIID(riid, &IID_IClassFactory)) {
 415           *ppvObj = This;
 416           InterlockedIncrement(&This->ref);
 417           return S_OK;
 418         }
 419
 420         TRACE("-- E_NOINTERFACE\n");
 421         return E_NOINTERFACE;
 422 }
 423 /******************************************************************************
 424  * IDefClF_fnAddRef
 425  */
 426 static ULONG WINAPI IDefClF_fnAddRef(LPCLASSFACTORY iface)
 427 {
 428         IDefClFImpl *This = (IDefClFImpl *)iface;
 429         ULONG refCount = InterlockedIncrement(&This->ref);
 430
 431         TRACE("(%p)->(count=%u)\n", This, refCount - 1);
 432
 433         return refCount;
 434 }
 435 /******************************************************************************
 436  * IDefClF_fnRelease
 437  */
 438 static ULONG WINAPI IDefClF_fnRelease(LPCLASSFACTORY iface)
 439 {
 440         IDefClFImpl *This = (IDefClFImpl *)iface;
 441         ULONG refCount = InterlockedDecrement(&This->ref);
 442
 443         TRACE("(%p)->(count=%u)\n", This, refCount + 1);
 444
 445         if (!refCount)
 446         {
 447           if (This->pcRefDll) InterlockedDecrement(This->pcRefDll);
 448
 449           TRACE("-- destroying IClassFactory(%p)\n",This);
 450           HeapFree(GetProcessHeap(),0,This);
 451           return 0;
 452         }
 453         return refCount;
 454 }
 455 /******************************************************************************
 456  * IDefClF_fnCreateInstance
 457  */
 458 static HRESULT WINAPI IDefClF_fnCreateInstance(
 459   LPCLASSFACTORY iface, LPUNKNOWN pUnkOuter, REFIID riid, LPVOID *ppvObject)
 460 {
 461         IDefClFImpl *This = (IDefClFImpl *)iface;
 462
 463         TRACE("%p->(%p,%s,%p)\n",This,pUnkOuter,shdebugstr_guid(riid),ppvObject);
 464
 465         *ppvObject = NULL;
 466
 467         if ( This->riidInst==NULL ||
 468              IsEqualCLSID(riid, This->riidInst) ||
 469              IsEqualCLSID(riid, &IID_IUnknown) )
 470         {
 471           return This->lpfnCI(pUnkOuter, riid, ppvObject);
 472         }
 473
 474         ERR("unknown IID requested %s\n",shdebugstr_guid(riid));
 475         return E_NOINTERFACE;
 476 }
 477 /******************************************************************************
 478  * IDefClF_fnLockServer
 479  */
 480 static HRESULT WINAPI IDefClF_fnLockServer(LPCLASSFACTORY iface, BOOL fLock)
 481 {
 482         IDefClFImpl *This = (IDefClFImpl *)iface;
 483         TRACE("%p->(0x%x), not implemented\n",This, fLock);
 484         return E_NOTIMPL;
 485 }
 486
 487 static const IClassFactoryVtbl dclfvt =
 488 {
 489     IDefClF_fnQueryInterface,
 490     IDefClF_fnAddRef,
 491   IDefClF_fnRelease,
 492   IDefClF_fnCreateInstance,
 493   IDefClF_fnLockServer
 494 };
 495
 496 /******************************************************************************
 497  * SHCreateDefClassObject                       [SHELL32.70]
 498  */
 499 HRESULT WINAPI SHCreateDefClassObject(
 500         REFIID  riid,
 501         LPVOID* ppv,
 502         LPFNCREATEINSTANCE lpfnCI,      /* [in] create instance callback entry */
 503         LPDWORD pcRefDll,               /* [in/out] ref count of the dll */
 504         REFIID  riidInst)               /* [in] optional interface to the instance */
 505 {
 506         IClassFactory * pcf;
 507
 508         TRACE("%s %p %p %p %s\n",
 509               shdebugstr_guid(riid), ppv, lpfnCI, pcRefDll, shdebugstr_guid(riidInst));
 510
 511         if (! IsEqualCLSID(riid, &IID_IClassFactory) ) return E_NOINTERFACE;
 512         if (! (pcf = IDefClF_fnConstructor(lpfnCI, (PLONG)pcRefDll, riidInst))) return E_OUTOFMEMORY;
 513         *ppv = pcf;
 514         return NOERROR;
 515 }
 516
 517 /*************************************************************************
 518  *  DragAcceptFiles             [SHELL32.@]
 519  */
 520 void WINAPI DragAcceptFiles(HWND hWnd, BOOL b)
 521 {
 522         LONG exstyle;
 523
 524         if( !IsWindow(hWnd) ) return;
 525         exstyle = GetWindowLongA(hWnd,GWL_EXSTYLE);
 526         if (b)
 527           exstyle |= WS_EX_ACCEPTFILES;
 528         else
 529           exstyle &= ~WS_EX_ACCEPTFILES;
 530         SetWindowLongA(hWnd,GWL_EXSTYLE,exstyle);
 531 }
 532
 533 /*************************************************************************
 534  * DragFinish           [SHELL32.@]
 535  */
 536 void WINAPI DragFinish(HDROP h)
 537 {
 538         TRACE("\n");
 539         GlobalFree((HGLOBAL)h);
 540 }
 541
 542 /*************************************************************************
 543  * DragQueryPoint               [SHELL32.@]
 544  */
 545 BOOL WINAPI DragQueryPoint(HDROP hDrop, POINT *p)
 546 {
 547         DROPFILES *lpDropFileStruct;
 548         BOOL bRet;
 549
 550         TRACE("\n");
 551
 552         lpDropFileStruct = (DROPFILES *) GlobalLock(hDrop);
 553
 554         *p = lpDropFileStruct->pt;
 555         bRet = lpDropFileStruct->fNC;
 556
 557         GlobalUnlock(hDrop);
 558         return bRet;
 559 }
 560
 561 /*************************************************************************
 562  *  DragQueryFileA              [SHELL32.@]
 563  *  DragQueryFile               [SHELL32.@]
 564  */
 565 UINT WINAPI DragQueryFileA(
 566         HDROP hDrop,
 567         UINT lFile,
 568         LPSTR lpszFile,
 569         UINT lLength)
 570 {
 571         LPSTR lpDrop;
 572         UINT i = 0;
 573         DROPFILES *lpDropFileStruct = (DROPFILES *) GlobalLock(hDrop);
 574
 575         TRACE("(%p, %x, %p, %u)\n",     hDrop,lFile,lpszFile,lLength);
 576
 577         if(!lpDropFileStruct) goto end;
 578
 579         lpDrop = (LPSTR) lpDropFileStruct + lpDropFileStruct->pFiles;
 580
 581         if(lpDropFileStruct->fWide) {
 582             LPWSTR lpszFileW = NULL;
 583
 584             if(lpszFile) {
 585                 lpszFileW = HeapAlloc(GetProcessHeap(), 0, lLength*sizeof(WCHAR));
 586                 if(lpszFileW == NULL) {
 587                     goto end;
 588                 }
 589             }
 590             i = DragQueryFileW(hDrop, lFile, lpszFileW, lLength);
 591
 592             if(lpszFileW) {
 593                 WideCharToMultiByte(CP_ACP, 0, lpszFileW, -1, lpszFile, lLength, 0, NULL);
 594                 HeapFree(GetProcessHeap(), 0, lpszFileW);
 595             }
 596             goto end;
 597         }
 598
 599         while (i++ < lFile)
 600         {
 601           while (*lpDrop++); /* skip filename */
 602           if (!*lpDrop)
 603           {
 604             i = (lFile == 0xFFFFFFFF) ? i : 0;
 605             goto end;
 606           }
 607         }
 608
 609         i = strlen(lpDrop);
 610         if (!lpszFile ) goto end;   /* needed buffer size */
 611         lstrcpynA (lpszFile, lpDrop, lLength);
 612 end:
 613         GlobalUnlock(hDrop);
 614         return i;
 615 }
 616
 617 /*************************************************************************
 618  *  DragQueryFileW              [SHELL32.@]
 619  */
 620 UINT WINAPI DragQueryFileW(
 621         HDROP hDrop,
 622         UINT lFile,
 623         LPWSTR lpszwFile,
 624         UINT lLength)
 625 {
 626         LPWSTR lpwDrop;
 627         UINT i = 0;
 628         DROPFILES *lpDropFileStruct = (DROPFILES *) GlobalLock(hDrop);
 629
 630         TRACE("(%p, %x, %p, %u)\n", hDrop,lFile,lpszwFile,lLength);
 631
 632         if(!lpDropFileStruct) goto end;
 633
 634         lpwDrop = (LPWSTR) ((LPSTR)lpDropFileStruct + lpDropFileStruct->pFiles);
 635
 636         if(lpDropFileStruct->fWide == FALSE) {
 637             LPSTR lpszFileA = NULL;
 638
 639             if(lpszwFile) {
 640                 lpszFileA = HeapAlloc(GetProcessHeap(), 0, lLength);
 641                 if(lpszFileA == NULL) {
 642                     goto end;
 643                 }
 644             }
 645             i = DragQueryFileA(hDrop, lFile, lpszFileA, lLength);
 646
 647             if(lpszFileA) {
 648                 MultiByteToWideChar(CP_ACP, 0, lpszFileA, -1, lpszwFile, lLength);
 649                 HeapFree(GetProcessHeap(), 0, lpszFileA);
 650             }
 651             goto end;
 652         }
 653
 654         i = 0;
 655         while (i++ < lFile)
 656         {
 657           while (*lpwDrop++); /* skip filename */
 658           if (!*lpwDrop)
 659           {
 660             i = (lFile == 0xFFFFFFFF) ? i : 0;
 661             goto end;
 662           }
 663         }
 664
 665         i = strlenW(lpwDrop);
 666         if ( !lpszwFile) goto end;   /* needed buffer size */
 667         lstrcpynW (lpszwFile, lpwDrop, lLength);
 668 end:
 669         GlobalUnlock(hDrop);
 670         return i;
 671 }