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;
 132         DWORD   dwSize;
 133         BOOLEAN bLoadFromShell32 = FALSE;
 134         BOOLEAN bLoadWithoutCOM = FALSE;
 135         IClassFactory * pcf = NULL;
 136
 137         if(!ppv) return E_POINTER;
 138         *ppv=NULL;
 139
 140         /* if the clsid is a string, convert it */
 141         if (!clsid)
 142         {
 143           if (!aclsid) return REGDB_E_CLASSNOTREG;
 144           SHCLSIDFromStringW(aclsid, &iid);
 145           myclsid = &iid;
 146         }
 147
 148         TRACE("(%p,%s,unk:%p,%s,%p)\n",
 149                 aclsid,shdebugstr_guid(myclsid),pUnkOuter,shdebugstr_guid(refiid),ppv);
 150
 151         /* we look up the dll path in the registry */
 152         __SHGUIDToStringW(myclsid, sClassID);
 153         lstrcpyW(sKeyName, sCLSID);
 154         lstrcatW(sKeyName, sClassID);
 155         lstrcatW(sKeyName, sInProcServer32);
 156
 157         if (ERROR_SUCCESS == RegOpenKeyExW(HKEY_CLASSES_ROOT, sKeyName, 0, KEY_READ, &hKey)) {
 158             dwSize = sizeof(sDllPath);
 159             SHQueryValueExW(hKey, NULL, 0,0, sDllPath, &dwSize );
 160
 161             /* if a special registry key is set, we load a shell extension without help of OLE32 */
 162             bLoadWithoutCOM = (ERROR_SUCCESS == SHQueryValueExW(hKey, sLoadWithoutCOM, 0, 0, 0, 0));
 163
 164             /* if the com object is inside shell32, omit use of ole32 */
 165             bLoadFromShell32 = (0==lstrcmpiW( PathFindFileNameW(sDllPath), sShell32));
 166
 167             RegCloseKey (hKey);
 168         } else {
 169             /* since we can't find it in the registry we try internally */
 170             bLoadFromShell32 = TRUE;
 171         }
 172
 173         TRACE("WithoutCom=%u FromShell=%u\n", bLoadWithoutCOM, bLoadFromShell32);
 174
 175         /* now we create an instance */
 176         if (bLoadFromShell32) {
 177             if (! SUCCEEDED(DllGetClassObject(myclsid, &IID_IClassFactory,(LPVOID*)&pcf))) {
 178                 ERR("LoadFromShell failed for CLSID=%s\n", shdebugstr_guid(myclsid));
 179             }
 180         } else if (bLoadWithoutCOM) {
 181
 182             /* load an external dll without ole32 */
 183             HANDLE hLibrary;
 184             typedef HRESULT (CALLBACK *DllGetClassObjectFunc)(REFCLSID clsid, REFIID iid, LPVOID *ppv);
 185             DllGetClassObjectFunc DllGetClassObject;
 186
 187             if ((hLibrary = LoadLibraryExW(sDllPath, 0, LOAD_WITH_ALTERED_SEARCH_PATH)) == 0) {
 188                 ERR("couldn't load InprocServer32 dll %s\n", debugstr_w(sDllPath));
 189                 hres = E_ACCESSDENIED;
 190                 goto end;
 191             } else if (!(DllGetClassObject = (DllGetClassObjectFunc)GetProcAddress(hLibrary, "DllGetClassObject"))) {
 192                 ERR("couldn't find function DllGetClassObject in %s\n", debugstr_w(sDllPath));
 193                 FreeLibrary( hLibrary );
 194                 hres = E_ACCESSDENIED;
 195                 goto end;
 196             } else if (! SUCCEEDED(hres = DllGetClassObject(myclsid, &IID_IClassFactory, (LPVOID*)&pcf))) {
 197                     TRACE("GetClassObject failed 0x%08x\n", hres);
 198                     goto end;
 199             }
 200
 201         } else {
 202
 203             /* load an external dll in the usual way */
 204             hres = CoCreateInstance(myclsid, pUnkOuter, CLSCTX_INPROC_SERVER, refiid, ppv);
 205             goto end;
 206         }
 207
 208         /* here we should have a ClassFactory */
 209         if (!pcf) return E_ACCESSDENIED;
 210
 211         hres = IClassFactory_CreateInstance(pcf, pUnkOuter, refiid, ppv);
 212         IClassFactory_Release(pcf);
 213 end:
 214         if(hres!=S_OK)
 215         {
 216           ERR("failed (0x%08x) to create CLSID:%s IID:%s\n",
 217               hres, shdebugstr_guid(myclsid), shdebugstr_guid(refiid));
 218           ERR("class not found in registry\n");
 219         }
 220
 221         TRACE("-- instance: %p\n",*ppv);
 222         return hres;
 223 }
 224
 225 /*************************************************************************
 226  * DllGetClassObject     [SHELL32.@]
 227  * SHDllGetClassObject   [SHELL32.128]
 228  */
 229 HRESULT WINAPI DllGetClassObject(REFCLSID rclsid, REFIID iid, LPVOID *ppv)
 230 {
 231         HRESULT hres = E_OUTOFMEMORY;
 232         IClassFactory * pcf = NULL;
 233         int i;
 234
 235         TRACE("CLSID:%s,IID:%s\n",shdebugstr_guid(rclsid),shdebugstr_guid(iid));
 236
 237         if (!ppv) return E_INVALIDARG;
 238         *ppv = NULL;
 239
 240         /* search our internal interface table */
 241         for(i=0;InterfaceTable[i].riid;i++) {
 242             if(IsEqualIID(InterfaceTable[i].riid, rclsid)) {
 243                 TRACE("index[%u]\n", i);
 244                 pcf = IDefClF_fnConstructor(InterfaceTable[i].lpfnCI, NULL, NULL);
 245             }
 246         }
 247
 248         if (!pcf) {
 249             FIXME("failed for CLSID=%s\n", shdebugstr_guid(rclsid));
 250             return CLASS_E_CLASSNOTAVAILABLE;
 251         }
 252
 253         hres = IClassFactory_QueryInterface(pcf, iid, ppv);
 254         IClassFactory_Release(pcf);
 255
 256         TRACE("-- pointer to class factory: %p\n",*ppv);
 257         return hres;
 258 }
 259
 260 /*************************************************************************
 261  * SHCLSIDFromString                            [SHELL32.147]
 262  *
 263  * Under Windows 9x this was an ANSI version of CLSIDFromString. It also allowed
 264  * to avoid dependency on ole32.dll (see SHLoadOLE for details).
 265  *
 266  * Under Windows NT/2000/XP this is equivalent to CLSIDFromString
 267  *
 268  * NOTES
 269  *     exported by ordinal
 270  *
 271  * SEE ALSO
 272  *     CLSIDFromString, SHLoadOLE
 273  */
 274 DWORD WINAPI SHCLSIDFromStringA (LPCSTR clsid, CLSID *id)
 275 {
 276     WCHAR buffer[40];
 277     TRACE("(%p(%s) %p)\n", clsid, clsid, id);
 278     if (!MultiByteToWideChar( CP_ACP, 0, clsid, -1, buffer, sizeof(buffer)/sizeof(WCHAR) ))
 279         return CO_E_CLASSSTRING;
 280     return CLSIDFromString( buffer, id );
 281 }
 282 DWORD WINAPI SHCLSIDFromStringW (LPCWSTR clsid, CLSID *id)
 283 {
 284         TRACE("(%p(%s) %p)\n", clsid, debugstr_w(clsid), id);
 285         return CLSIDFromString((LPWSTR)clsid, id);
 286 }
 287 DWORD WINAPI SHCLSIDFromStringAW (LPVOID clsid, CLSID *id)
 288 {
 289         if (SHELL_OsIsUnicode())
 290           return SHCLSIDFromStringW (clsid, id);
 291         return SHCLSIDFromStringA (clsid, id);
 292 }
 293
 294 /*************************************************************************
 295  *                       SHGetMalloc                    [SHELL32.@]
 296  *
 297  * Equivalent to CoGetMalloc(MEMCTX_TASK, ...). Under Windows 9x this function
 298  * could use the shell32 built-in "mini-COM" without the need to load ole32.dll -
 299  * see SHLoadOLE for details.
 300  *
 301  * PARAMS
 302  *  lpmal [O] Destination for IMalloc interface.
 303  *
 304  * RETURNS
 305  *  Success: S_OK. lpmal contains the shells IMalloc interface.
 306  *  Failure. An HRESULT error code.
 307  *
 308  * SEE ALSO
 309  *  CoGetMalloc, SHLoadOLE
 310  */
 311 HRESULT WINAPI SHGetMalloc(LPMALLOC *lpmal)
 312 {
 313         TRACE("(%p)\n", lpmal);
 314         return CoGetMalloc(MEMCTX_TASK, lpmal);
 315 }
 316
 317 /*************************************************************************
 318  * SHAlloc                                      [SHELL32.196]
 319  *
 320  * Equivalent to CoTaskMemAlloc. Under Windows 9x this function could use
 321  * the shell32 built-in "mini-COM" without the need to load ole32.dll -
 322  * see SHLoadOLE for details.
 323  *
 324  * NOTES
 325  *     exported by ordinal
 326  *
 327  * SEE ALSO
 328  *     CoTaskMemAlloc, SHLoadOLE
 329  */
 330 LPVOID WINAPI SHAlloc(DWORD len)
 331 {
 332         LPVOID ret;
 333
 334         ret = CoTaskMemAlloc(len);
 335         TRACE("%u bytes at %p\n",len, ret);
 336         return ret;
 337 }
 338
 339 /*************************************************************************
 340  * SHFree                                       [SHELL32.195]
 341  *
 342  * Equivalent to CoTaskMemFree. Under Windows 9x this function could use
 343  * the shell32 built-in "mini-COM" without the need to load ole32.dll -
 344  * see SHLoadOLE for details.
 345  *
 346  * NOTES
 347  *     exported by ordinal
 348  *
 349  * SEE ALSO
 350  *     CoTaskMemFree, SHLoadOLE
 351  */
 352 void WINAPI SHFree(LPVOID pv)
 353 {
 354         TRACE("%p\n",pv);
 355         CoTaskMemFree(pv);
 356 }
 357
 358 /*************************************************************************
 359  * SHGetDesktopFolder                   [SHELL32.@]
 360  */
 361 HRESULT WINAPI SHGetDesktopFolder(IShellFolder **psf)
 362 {
 363         HRESULT hres = S_OK;
 364         TRACE("\n");
 365
 366         if(!psf) return E_INVALIDARG;
 367         *psf = NULL;
 368         hres = ISF_Desktop_Constructor(NULL, &IID_IShellFolder,(LPVOID*)psf);
 369
 370         TRACE("-- %p->(%p)\n",psf, *psf);
 371         return hres;
 372 }
 373 /**************************************************************************
 374  * Default ClassFactory Implementation
 375  *
 376  * SHCreateDefClassObject
 377  *
 378  * NOTES
 379  *  Helper function for dlls without their own classfactory.
 380  *  A generic classfactory is returned.
 381  *  When the CreateInstance of the cf is called the callback is executed.
 382  */
 383
 384 typedef struct
 385 {
 386     const IClassFactoryVtbl    *lpVtbl;
 387     LONG                        ref;
 388     CLSID                       *rclsid;
 389     LPFNCREATEINSTANCE          lpfnCI;
 390     const IID *                 riidInst;
 391     LONG *                      pcRefDll; /* pointer to refcounter in external dll (ugrrr...) */
 392 } IDefClFImpl;
 393
 394 static const IClassFactoryVtbl dclfvt;
 395
 396 /**************************************************************************
 397  *  IDefClF_fnConstructor
 398  */
 399
 400 static IClassFactory * IDefClF_fnConstructor(LPFNCREATEINSTANCE lpfnCI, PLONG pcRefDll, REFIID riidInst)
 401 {
 402         IDefClFImpl* lpclf;
 403
 404         lpclf = HeapAlloc(GetProcessHeap(),0,sizeof(IDefClFImpl));
 405         lpclf->ref = 1;
 406         lpclf->lpVtbl = &dclfvt;
 407         lpclf->lpfnCI = lpfnCI;
 408         lpclf->pcRefDll = pcRefDll;
 409
 410         if (pcRefDll) InterlockedIncrement(pcRefDll);
 411         lpclf->riidInst = riidInst;
 412
 413         TRACE("(%p)%s\n",lpclf, shdebugstr_guid(riidInst));
 414         return (LPCLASSFACTORY)lpclf;
 415 }
 416 /**************************************************************************
 417  *  IDefClF_fnQueryInterface
 418  */
 419 static HRESULT WINAPI IDefClF_fnQueryInterface(
 420   LPCLASSFACTORY iface, REFIID riid, LPVOID *ppvObj)
 421 {
 422         IDefClFImpl *This = (IDefClFImpl *)iface;
 423
 424         TRACE("(%p)->(%s)\n",This,shdebugstr_guid(riid));
 425
 426         *ppvObj = NULL;
 427
 428         if(IsEqualIID(riid, &IID_IUnknown) || IsEqualIID(riid, &IID_IClassFactory)) {
 429           *ppvObj = This;
 430           InterlockedIncrement(&This->ref);
 431           return S_OK;
 432         }
 433
 434         TRACE("-- E_NOINTERFACE\n");
 435         return E_NOINTERFACE;
 436 }
 437 /******************************************************************************
 438  * IDefClF_fnAddRef
 439  */
 440 static ULONG WINAPI IDefClF_fnAddRef(LPCLASSFACTORY iface)
 441 {
 442         IDefClFImpl *This = (IDefClFImpl *)iface;
 443         ULONG refCount = InterlockedIncrement(&This->ref);
 444
 445         TRACE("(%p)->(count=%u)\n", This, refCount - 1);
 446
 447         return refCount;
 448 }
 449 /******************************************************************************
 450  * IDefClF_fnRelease
 451  */
 452 static ULONG WINAPI IDefClF_fnRelease(LPCLASSFACTORY iface)
 453 {
 454         IDefClFImpl *This = (IDefClFImpl *)iface;
 455         ULONG refCount = InterlockedDecrement(&This->ref);
 456
 457         TRACE("(%p)->(count=%u)\n", This, refCount + 1);
 458
 459         if (!refCount)
 460         {
 461           if (This->pcRefDll) InterlockedDecrement(This->pcRefDll);
 462
 463           TRACE("-- destroying IClassFactory(%p)\n",This);
 464           HeapFree(GetProcessHeap(),0,This);
 465           return 0;
 466         }
 467         return refCount;
 468 }
 469 /******************************************************************************
 470  * IDefClF_fnCreateInstance
 471  */
 472 static HRESULT WINAPI IDefClF_fnCreateInstance(
 473   LPCLASSFACTORY iface, LPUNKNOWN pUnkOuter, REFIID riid, LPVOID *ppvObject)
 474 {
 475         IDefClFImpl *This = (IDefClFImpl *)iface;
 476
 477         TRACE("%p->(%p,%s,%p)\n",This,pUnkOuter,shdebugstr_guid(riid),ppvObject);
 478
 479         *ppvObject = NULL;
 480
 481         if ( This->riidInst==NULL ||
 482              IsEqualCLSID(riid, This->riidInst) ||
 483              IsEqualCLSID(riid, &IID_IUnknown) )
 484         {
 485           return This->lpfnCI(pUnkOuter, riid, ppvObject);
 486         }
 487
 488         ERR("unknown IID requested %s\n",shdebugstr_guid(riid));
 489         return E_NOINTERFACE;
 490 }
 491 /******************************************************************************
 492  * IDefClF_fnLockServer
 493  */
 494 static HRESULT WINAPI IDefClF_fnLockServer(LPCLASSFACTORY iface, BOOL fLock)
 495 {
 496         IDefClFImpl *This = (IDefClFImpl *)iface;
 497         TRACE("%p->(0x%x), not implemented\n",This, fLock);
 498         return E_NOTIMPL;
 499 }
 500
 501 static const IClassFactoryVtbl dclfvt =
 502 {
 503     IDefClF_fnQueryInterface,
 504     IDefClF_fnAddRef,
 505   IDefClF_fnRelease,
 506   IDefClF_fnCreateInstance,
 507   IDefClF_fnLockServer
 508 };
 509
 510 /******************************************************************************
 511  * SHCreateDefClassObject                       [SHELL32.70]
 512  */
 513 HRESULT WINAPI SHCreateDefClassObject(
 514         REFIID  riid,
 515         LPVOID* ppv,
 516         LPFNCREATEINSTANCE lpfnCI,      /* [in] create instance callback entry */
 517         LPDWORD pcRefDll,               /* [in/out] ref count of the dll */
 518         REFIID  riidInst)               /* [in] optional interface to the instance */
 519 {
 520         IClassFactory * pcf;
 521
 522         TRACE("%s %p %p %p %s\n",
 523               shdebugstr_guid(riid), ppv, lpfnCI, pcRefDll, shdebugstr_guid(riidInst));
 524
 525         if (! IsEqualCLSID(riid, &IID_IClassFactory) ) return E_NOINTERFACE;
 526         if (! (pcf = IDefClF_fnConstructor(lpfnCI, (PLONG)pcRefDll, riidInst))) return E_OUTOFMEMORY;
 527         *ppv = pcf;
 528         return NOERROR;
 529 }
 530
 531 /*************************************************************************
 532  *  DragAcceptFiles             [SHELL32.@]
 533  */
 534 void WINAPI DragAcceptFiles(HWND hWnd, BOOL b)
 535 {
 536         LONG exstyle;
 537
 538         if( !IsWindow(hWnd) ) return;
 539         exstyle = GetWindowLongA(hWnd,GWL_EXSTYLE);
 540         if (b)
 541           exstyle |= WS_EX_ACCEPTFILES;
 542         else
 543           exstyle &= ~WS_EX_ACCEPTFILES;
 544         SetWindowLongA(hWnd,GWL_EXSTYLE,exstyle);
 545 }
 546
 547 /*************************************************************************
 548  * DragFinish           [SHELL32.@]
 549  */
 550 void WINAPI DragFinish(HDROP h)
 551 {
 552         TRACE("\n");
 553         GlobalFree((HGLOBAL)h);
 554 }
 555
 556 /*************************************************************************
 557  * DragQueryPoint               [SHELL32.@]
 558  */
 559 BOOL WINAPI DragQueryPoint(HDROP hDrop, POINT *p)
 560 {
 561         DROPFILES *lpDropFileStruct;
 562         BOOL bRet;
 563
 564         TRACE("\n");
 565
 566         lpDropFileStruct = (DROPFILES *) GlobalLock(hDrop);
 567
 568         *p = lpDropFileStruct->pt;
 569         bRet = lpDropFileStruct->fNC;
 570
 571         GlobalUnlock(hDrop);
 572         return bRet;
 573 }
 574
 575 /*************************************************************************
 576  *  DragQueryFileA              [SHELL32.@]
 577  *  DragQueryFile               [SHELL32.@]
 578  */
 579 UINT WINAPI DragQueryFileA(
 580         HDROP hDrop,
 581         UINT lFile,
 582         LPSTR lpszFile,
 583         UINT lLength)
 584 {
 585         LPSTR lpDrop;
 586         UINT i = 0;
 587         DROPFILES *lpDropFileStruct = (DROPFILES *) GlobalLock(hDrop);
 588
 589         TRACE("(%p, %x, %p, %u)\n",     hDrop,lFile,lpszFile,lLength);
 590
 591         if(!lpDropFileStruct) goto end;
 592
 593         lpDrop = (LPSTR) lpDropFileStruct + lpDropFileStruct->pFiles;
 594
 595         if(lpDropFileStruct->fWide) {
 596             LPWSTR lpszFileW = NULL;
 597
 598             if(lpszFile) {
 599                 lpszFileW = HeapAlloc(GetProcessHeap(), 0, lLength*sizeof(WCHAR));
 600                 if(lpszFileW == NULL) {
 601                     goto end;
 602                 }
 603             }
 604             i = DragQueryFileW(hDrop, lFile, lpszFileW, lLength);
 605
 606             if(lpszFileW) {
 607                 WideCharToMultiByte(CP_ACP, 0, lpszFileW, -1, lpszFile, lLength, 0, NULL);
 608                 HeapFree(GetProcessHeap(), 0, lpszFileW);
 609             }
 610             goto end;
 611         }
 612
 613         while (i++ < lFile)
 614         {
 615           while (*lpDrop++); /* skip filename */
 616           if (!*lpDrop)
 617           {
 618             i = (lFile == 0xFFFFFFFF) ? i : 0;
 619             goto end;
 620           }
 621         }
 622
 623         i = strlen(lpDrop);
 624         i++;
 625         if (!lpszFile ) goto end;   /* needed buffer size */
 626         i = (lLength > i) ? i : lLength;
 627         lstrcpynA (lpszFile,  lpDrop,  i);
 628 end:
 629         GlobalUnlock(hDrop);
 630         return i;
 631 }
 632
 633 /*************************************************************************
 634  *  DragQueryFileW              [SHELL32.@]
 635  */
 636 UINT WINAPI DragQueryFileW(
 637         HDROP hDrop,
 638         UINT lFile,
 639         LPWSTR lpszwFile,
 640         UINT lLength)
 641 {
 642         LPWSTR lpwDrop;
 643         UINT i = 0;
 644         DROPFILES *lpDropFileStruct = (DROPFILES *) GlobalLock(hDrop);
 645
 646         TRACE("(%p, %x, %p, %u)\n", hDrop,lFile,lpszwFile,lLength);
 647
 648         if(!lpDropFileStruct) goto end;
 649
 650         lpwDrop = (LPWSTR) ((LPSTR)lpDropFileStruct + lpDropFileStruct->pFiles);
 651
 652         if(lpDropFileStruct->fWide == FALSE) {
 653             LPSTR lpszFileA = NULL;
 654
 655             if(lpszwFile) {
 656                 lpszFileA = HeapAlloc(GetProcessHeap(), 0, lLength);
 657                 if(lpszFileA == NULL) {
 658                     goto end;
 659                 }
 660             }
 661             i = DragQueryFileA(hDrop, lFile, lpszFileA, lLength);
 662
 663             if(lpszFileA) {
 664                 MultiByteToWideChar(CP_ACP, 0, lpszFileA, -1, lpszwFile, lLength);
 665                 HeapFree(GetProcessHeap(), 0, lpszFileA);
 666             }
 667             goto end;
 668         }
 669
 670         i = 0;
 671         while (i++ < lFile)
 672         {
 673           while (*lpwDrop++); /* skip filename */
 674           if (!*lpwDrop)
 675           {
 676             i = (lFile == 0xFFFFFFFF) ? i : 0;
 677             goto end;
 678           }
 679         }
 680
 681         i = strlenW(lpwDrop);
 682         i++;
 683         if ( !lpszwFile) goto end;   /* needed buffer size */
 684
 685         i = (lLength > i) ? i : lLength;
 686         lstrcpynW (lpszwFile, lpwDrop, i);
 687 end:
 688         GlobalUnlock(hDrop);
 689         return i;
 690 }