dll/win32/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 <precomp.h>
  23
  24 WINE_DEFAULT_DEBUG_CHANNEL(shell);
  25
  26 extern HRESULT WINAPI IFSFolder_Constructor(IUnknown * pUnkOuter, REFIID riid, LPVOID * ppv);
  27
  28 static const WCHAR sShell32[12] = {'S','H','E','L','L','3','2','.','D','L','L','\0'};
  29 static const GUID dummy1 = {0xD969A300, 0xE7FF, 0x11d0, {0xA9, 0x3B, 0x00, 0xA0, 0xC9, 0x0F, 0x27, 0x19} };
  30
  31 /**************************************************************************
  32  * Default ClassFactory types
  33  */
  34 typedef HRESULT (CALLBACK *LPFNCREATEINSTANCE)(IUnknown* pUnkOuter, REFIID riid, LPVOID* ppvObject);
  35 static IClassFactory * IDefClF_fnConstructor(LPFNCREATEINSTANCE lpfnCI, PLONG pcRefDll, REFIID riidInst);
  36
  37 /* this table contains all CLSID's of shell32 objects */
  38 static const struct {
  39         REFIID                  riid;
  40         LPFNCREATEINSTANCE      lpfnCI;
  41 } InterfaceTable[] = {
  42         {&CLSID_ShellFSFolder,  &IFSFolder_Constructor},
  43         {&CLSID_MyComputer,     &ISF_MyComputer_Constructor},
  44         {&CLSID_NetworkPlaces,  &ISF_NetworkPlaces_Constructor},
  45         {&CLSID_ShellDesktop,   &ISF_Desktop_Constructor},
  46         {&CLSID_ShellItem,      &IShellItem_Constructor},
  47         {&CLSID_ShellLink,      &IShellLink_Constructor},
  48         {&CLSID_DragDropHelper, &IDropTargetHelper_Constructor},
  49         {&CLSID_ControlPanel,   &IControlPanel_Constructor},
  50         {&CLSID_AutoComplete,   &IAutoComplete_Constructor},
  51 #if 0
  52         {&CLSID_UnixFolder,     &UnixFolder_Constructor},
  53         {&CLSID_UnixDosFolder,  &UnixDosFolder_Constructor},
  54         {&CLSID_FolderShortcut, &FolderShortcut_Constructor},
  55 #endif
  56         {&CLSID_MyDocuments,    &ISF_MyDocuments_Constructor},
  57         {&CLSID_FontsFolderShortcut, &ISF_Fonts_Constructor},
  58         {&CLSID_Printers,       &ISF_Printers_Constructor},
  59         {&CLSID_AdminFolderShortcut, &ISF_AdminTools_Constructor},
  60         {&CLSID_RecycleBin,     &RecycleBin_Constructor},
  61         {&CLSID_OpenWith,       &SHEOW_Constructor},
  62         {&dummy1,               &INewItem_Constructor},
  63         {&CLSID_StartMenu,      &StartMenu_Constructor},
  64         {&CLSID_MenuBandSite,   &MenuBandSite_Constructor},
  65         {NULL,NULL}
  66 };
  67
  68
  69 /* FIXME: this should be SHLWAPI.24 since we can't yet import by ordinal */
  70
  71 DWORD WINAPI __SHGUIDToStringW (REFGUID guid, LPWSTR str)
  72 {
  73     WCHAR sFormat[52] = {'{','%','0','8','l','x','-','%','0','4',
  74                          'x','-','%','0','4','x','-','%','0','2',
  75                          'x','%','0','2','x','-','%','0','2','x',
  76                          '%','0','2','x','%','0','2','x','%','0',
  77                          '2','x','%','0','2','x','%','0','2','x',
  78                          '}','\0'};
  79
  80     return swprintf ( str, sFormat,
  81              guid->Data1, guid->Data2, guid->Data3,
  82              guid->Data4[0], guid->Data4[1], guid->Data4[2], guid->Data4[3],
  83              guid->Data4[4], guid->Data4[5], guid->Data4[6], guid->Data4[7] );
  84
  85 }
  86
  87 /*************************************************************************
  88  * SHCoCreateInstance [SHELL32.102]
  89  *
  90  * Equivalent to CoCreateInstance. Under Windows 9x this function could sometimes
  91  * use the shell32 built-in "mini-COM" without the need to load ole32.dll - see
  92  * SHLoadOLE for details.
  93  *
  94  * Under wine if a "LoadWithoutCOM" value is present or the object resides in
  95  * shell32.dll the function will load the object manually without the help of ole32
  96  *
  97  * NOTES
  98  *     exported by ordinal
  99  *
 100  * SEE ALSO
 101  *     CoCreateInstace, SHLoadOLE
 102  */
 103 HRESULT WINAPI SHCoCreateInstance(
 104         LPCWSTR aclsid,
 105         const CLSID *clsid,
 106         LPUNKNOWN pUnkOuter,
 107         REFIID refiid,
 108         LPVOID *ppv)
 109 {
 110         DWORD   hres;
 111         CLSID   iid;
 112         const   CLSID * myclsid = clsid;
 113         WCHAR   sKeyName[MAX_PATH];
 114         const   WCHAR sCLSID[7] = {'C','L','S','I','D','\\','\0'};
 115         WCHAR   sClassID[60];
 116         const WCHAR sInProcServer32[16] ={'\\','I','n','p','r','o','c','S','e','r','v','e','r','3','2','\0'};
 117         const WCHAR sLoadWithoutCOM[15] ={'L','o','a','d','W','i','t','h','o','u','t','C','O','M','\0'};
 118         WCHAR   sDllPath[MAX_PATH];
 119         HKEY    hKey;
 120         DWORD   dwSize;
 121         BOOLEAN bLoadFromShell32 = FALSE;
 122         BOOLEAN bLoadWithoutCOM = FALSE;
 123         IClassFactory * pcf = NULL;
 124
 125         if(!ppv) return E_POINTER;
 126         *ppv=NULL;
 127
 128         /* if the clsid is a string, convert it */
 129         if (!clsid)
 130         {
 131           if (!aclsid) return REGDB_E_CLASSNOTREG;
 132           CLSIDFromString((LPOLESTR)aclsid, &iid);
 133           myclsid = &iid;
 134         }
 135
 136         TRACE("(%p,%s,unk:%p,%s,%p)\n",
 137                 aclsid,shdebugstr_guid(myclsid),pUnkOuter,shdebugstr_guid(refiid),ppv);
 138
 139         /* we look up the dll path in the registry */
 140         __SHGUIDToStringW(myclsid, sClassID);
 141         wcscpy(sKeyName, sCLSID);
 142         wcscat(sKeyName, sClassID);
 143         wcscat(sKeyName, sInProcServer32);
 144
 145         if (ERROR_SUCCESS == RegOpenKeyExW(HKEY_CLASSES_ROOT, sKeyName, 0, KEY_READ, &hKey)) {
 146             dwSize = sizeof(sDllPath);
 147             SHQueryValueExW(hKey, NULL, 0,0, sDllPath, &dwSize );
 148
 149             /* if a special registry key is set, we load a shell extension without help of OLE32 */
 150             bLoadWithoutCOM = (ERROR_SUCCESS == SHQueryValueExW(hKey, sLoadWithoutCOM, 0, 0, 0, 0));
 151
 152             /* if the com object is inside shell32, omit use of ole32 */
 153             bLoadFromShell32 = (0==lstrcmpiW( PathFindFileNameW(sDllPath), sShell32));
 154
 155             RegCloseKey (hKey);
 156         } else {
 157             /* since we can't find it in the registry we try internally */
 158             bLoadFromShell32 = TRUE;
 159         }
 160
 161         TRACE("WithoutCom=%u FromShell=%u\n", bLoadWithoutCOM, bLoadFromShell32);
 162
 163         /* now we create an instance */
 164         if (bLoadFromShell32) {
 165             if (! SUCCEEDED(DllGetClassObject(myclsid, &IID_IClassFactory,(LPVOID*)&pcf))) {
 166                 ERR("LoadFromShell failed for CLSID=%s\n", shdebugstr_guid(myclsid));
 167             }
 168         } else if (bLoadWithoutCOM) {
 169
 170             /* load an external dll without ole32 */
 171             HANDLE hLibrary;
 172             typedef HRESULT (CALLBACK *DllGetClassObjectFunc)(REFCLSID clsid, REFIID iid, LPVOID *ppv);
 173             DllGetClassObjectFunc DllGetClassObject;
 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         } else {
 190
 191             /* load an external dll in the usual way */
 192             hres = CoCreateInstance(myclsid, pUnkOuter, CLSCTX_INPROC_SERVER, refiid, ppv);
 193             goto end;
 194         }
 195
 196         /* here we should have a ClassFactory */
 197         if (!pcf) return E_ACCESSDENIED;
 198
 199         hres = IClassFactory_CreateInstance(pcf, pUnkOuter, refiid, ppv);
 200         IClassFactory_Release(pcf);
 201 end:
 202         if(hres!=S_OK)
 203         {
 204           ERR("failed (0x%08x) to create CLSID:%s IID:%s\n",
 205               hres, shdebugstr_guid(myclsid), shdebugstr_guid(refiid));
 206           ERR("class not found in registry\n");
 207         }
 208
 209         TRACE("-- instance: %p\n",*ppv);
 210         return hres;
 211 }
 212
 213 /*************************************************************************
 214  * DllGetClassObject     [SHELL32.@]
 215  * SHDllGetClassObject   [SHELL32.128]
 216  */
 217 HRESULT WINAPI DllGetClassObject(REFCLSID rclsid, REFIID iid, LPVOID *ppv)
 218 {
 219         HRESULT hres = E_OUTOFMEMORY;
 220         IClassFactory * pcf = NULL;
 221         int i;
 222
 223         TRACE("CLSID:%s,IID:%s\n",shdebugstr_guid(rclsid),shdebugstr_guid(iid));
 224
 225         if (!ppv) return E_INVALIDARG;
 226         *ppv = NULL;
 227
 228         /* search our internal interface table */
 229         for(i=0;InterfaceTable[i].riid;i++) {
 230             if(IsEqualIID(InterfaceTable[i].riid, rclsid)) {
 231                 TRACE("index[%u]\n", i);
 232                 pcf = IDefClF_fnConstructor(InterfaceTable[i].lpfnCI, NULL, NULL);
 233             }
 234         }
 235
 236         if (!pcf) {
 237             FIXME("failed for CLSID=%s\n", shdebugstr_guid(rclsid));
 238             return CLASS_E_CLASSNOTAVAILABLE;
 239         }
 240
 241         hres = IClassFactory_QueryInterface(pcf, iid, ppv);
 242         IClassFactory_Release(pcf);
 243
 244         TRACE("-- pointer to class factory: %p\n",*ppv);
 245         return hres;
 246 }
 247
 248 /*************************************************************************
 249  * SHCLSIDFromString                            [SHELL32.147]
 250  *
 251  * Under Windows 9x this was an ANSI version of CLSIDFromString. It also allowed
 252  * to avoid dependency on ole32.dll (see SHLoadOLE for details).
 253  *
 254  * Under Windows NT/2000/XP this is equivalent to CLSIDFromString
 255  *
 256  * NOTES
 257  *     exported by ordinal
 258  *
 259  * SEE ALSO
 260  *     CLSIDFromString, SHLoadOLE
 261  */
 262 DWORD WINAPI SHCLSIDFromStringA (LPCSTR clsid, CLSID *id)
 263 {
 264     WCHAR buffer[40];
 265     TRACE("(%p(%s) %p)\n", clsid, clsid, id);
 266     if (!MultiByteToWideChar( CP_ACP, 0, clsid, -1, buffer, sizeof(buffer)/sizeof(WCHAR) ))
 267         return CO_E_CLASSSTRING;
 268     return CLSIDFromString( buffer, id );
 269 }
 270 DWORD WINAPI SHCLSIDFromStringW (LPCWSTR clsid, CLSID *id)
 271 {
 272         TRACE("(%p(%s) %p)\n", clsid, debugstr_w(clsid), id);
 273         return CLSIDFromString((LPWSTR)clsid, id);
 274 }
 275 DWORD WINAPI SHCLSIDFromStringAW (LPCVOID clsid, CLSID *id)
 276 {
 277         if (SHELL_OsIsUnicode())
 278           return SHCLSIDFromStringW (clsid, id);
 279         return SHCLSIDFromStringA (clsid, id);
 280 }
 281
 282 /*************************************************************************
 283  *                       SHGetMalloc                    [SHELL32.@]
 284  *
 285  * Equivalent to CoGetMalloc(MEMCTX_TASK, ...). Under Windows 9x this function
 286  * could use the shell32 built-in "mini-COM" without the need to load ole32.dll -
 287  * see SHLoadOLE for details.
 288  *
 289  * PARAMS
 290  *  lpmal [O] Destination for IMalloc interface.
 291  *
 292  * RETURNS
 293  *  Success: S_OK. lpmal contains the shells IMalloc interface.
 294  *  Failure. An HRESULT error code.
 295  *
 296  * SEE ALSO
 297  *  CoGetMalloc, SHLoadOLE
 298  */
 299 HRESULT WINAPI SHGetMalloc(LPMALLOC *lpmal)
 300 {
 301         TRACE("(%p)\n", lpmal);
 302         return CoGetMalloc(MEMCTX_TASK, lpmal);
 303 }
 304
 305 /*************************************************************************
 306  * SHAlloc                                      [SHELL32.196]
 307  *
 308  * Equivalent to CoTaskMemAlloc. Under Windows 9x this function could use
 309  * the shell32 built-in "mini-COM" without the need to load ole32.dll -
 310  * see SHLoadOLE for details.
 311  *
 312  * NOTES
 313  *     exported by ordinal
 314  *
 315  * SEE ALSO
 316  *     CoTaskMemAlloc, SHLoadOLE
 317  */
 318 LPVOID WINAPI SHAlloc(DWORD len)
 319 {
 320         LPVOID ret;
 321
 322         ret = CoTaskMemAlloc(len);
 323         TRACE("%u bytes at %p\n",len, ret);
 324         return ret;
 325 }
 326
 327 /*************************************************************************
 328  * SHFree                                       [SHELL32.195]
 329  *
 330  * Equivalent to CoTaskMemFree. Under Windows 9x this function could use
 331  * the shell32 built-in "mini-COM" without the need to load ole32.dll -
 332  * see SHLoadOLE for details.
 333  *
 334  * NOTES
 335  *     exported by ordinal
 336  *
 337  * SEE ALSO
 338  *     CoTaskMemFree, SHLoadOLE
 339  */
 340 void WINAPI SHFree(LPVOID pv)
 341 {
 342         TRACE("%p\n",pv);
 343         CoTaskMemFree(pv);
 344 }
 345
 346 /*************************************************************************
 347  * SHGetDesktopFolder                   [SHELL32.@]
 348  */
 349 HRESULT WINAPI SHGetDesktopFolder(IShellFolder **psf)
 350 {
 351         HRESULT hres = S_OK;
 352         TRACE("\n");
 353
 354         if(!psf) return E_INVALIDARG;
 355         *psf = NULL;
 356         hres = ISF_Desktop_Constructor(NULL, &IID_IShellFolder,(LPVOID*)psf);
 357
 358         TRACE("-- %p->(%p)\n",psf, *psf);
 359         return hres;
 360 }
 361 /**************************************************************************
 362  * Default ClassFactory Implementation
 363  *
 364  * SHCreateDefClassObject
 365  *
 366  * NOTES
 367  *  Helper function for dlls without their own classfactory.
 368  *  A generic classfactory is returned.
 369  *  When the CreateInstance of the cf is called the callback is executed.
 370  */
 371
 372 typedef struct
 373 {
 374     const IClassFactoryVtbl    *lpVtbl;
 375     LONG                        ref;
 376     CLSID                       *rclsid;
 377     LPFNCREATEINSTANCE          lpfnCI;
 378     const IID *                 riidInst;
 379     LONG *                      pcRefDll; /* pointer to refcounter in external dll (ugrrr...) */
 380 } IDefClFImpl;
 381
 382 static const IClassFactoryVtbl dclfvt;
 383
 384 /**************************************************************************
 385  *  IDefClF_fnConstructor
 386  */
 387
 388 static IClassFactory * IDefClF_fnConstructor(LPFNCREATEINSTANCE lpfnCI, PLONG pcRefDll, REFIID riidInst)
 389 {
 390         IDefClFImpl* lpclf;
 391
 392         lpclf = HeapAlloc(GetProcessHeap(),0,sizeof(IDefClFImpl));
 393         lpclf->ref = 1;
 394         lpclf->lpVtbl = &dclfvt;
 395         lpclf->lpfnCI = lpfnCI;
 396         lpclf->pcRefDll = pcRefDll;
 397
 398         if (pcRefDll) InterlockedIncrement(pcRefDll);
 399         lpclf->riidInst = riidInst;
 400
 401         TRACE("(%p)%s\n",lpclf, shdebugstr_guid(riidInst));
 402         return (LPCLASSFACTORY)lpclf;
 403 }
 404 /**************************************************************************
 405  *  IDefClF_fnQueryInterface
 406  */
 407 static HRESULT WINAPI IDefClF_fnQueryInterface(
 408   LPCLASSFACTORY iface, REFIID riid, LPVOID *ppvObj)
 409 {
 410         IDefClFImpl *This = (IDefClFImpl *)iface;
 411
 412         TRACE("(%p)->(%s)\n",This,shdebugstr_guid(riid));
 413
 414         *ppvObj = NULL;
 415
 416         if(IsEqualIID(riid, &IID_IUnknown) || IsEqualIID(riid, &IID_IClassFactory)) {
 417           *ppvObj = This;
 418           InterlockedIncrement(&This->ref);
 419           return S_OK;
 420         }
 421
 422         TRACE("-- E_NOINTERFACE\n");
 423         return E_NOINTERFACE;
 424 }
 425 /******************************************************************************
 426  * IDefClF_fnAddRef
 427  */
 428 static ULONG WINAPI IDefClF_fnAddRef(LPCLASSFACTORY iface)
 429 {
 430         IDefClFImpl *This = (IDefClFImpl *)iface;
 431         ULONG refCount = InterlockedIncrement(&This->ref);
 432
 433         TRACE("(%p)->(count=%u)\n", This, refCount - 1);
 434
 435         return refCount;
 436 }
 437 /******************************************************************************
 438  * IDefClF_fnRelease
 439  */
 440 static ULONG WINAPI IDefClF_fnRelease(LPCLASSFACTORY iface)
 441 {
 442         IDefClFImpl *This = (IDefClFImpl *)iface;
 443         ULONG refCount = InterlockedDecrement(&This->ref);
 444
 445         TRACE("(%p)->(count=%u)\n", This, refCount + 1);
 446
 447         if (!refCount)
 448         {
 449           if (This->pcRefDll) InterlockedDecrement(This->pcRefDll);
 450
 451           TRACE("-- destroying IClassFactory(%p)\n",This);
 452           HeapFree(GetProcessHeap(),0,This);
 453           return 0;
 454         }
 455         return refCount;
 456 }
 457 /******************************************************************************
 458  * IDefClF_fnCreateInstance
 459  */
 460 static HRESULT WINAPI IDefClF_fnCreateInstance(
 461   LPCLASSFACTORY iface, LPUNKNOWN pUnkOuter, REFIID riid, LPVOID *ppvObject)
 462 {
 463         IDefClFImpl *This = (IDefClFImpl *)iface;
 464
 465         TRACE("%p->(%p,%s,%p)\n",This,pUnkOuter,shdebugstr_guid(riid),ppvObject);
 466
 467         *ppvObject = NULL;
 468
 469         if ( This->riidInst==NULL ||
 470              IsEqualCLSID(riid, This->riidInst) ||
 471              IsEqualCLSID(riid, &IID_IUnknown) )
 472         {
 473           return This->lpfnCI(pUnkOuter, riid, ppvObject);
 474         }
 475
 476         ERR("unknown IID requested %s\n",shdebugstr_guid(riid));
 477         return E_NOINTERFACE;
 478 }
 479 /******************************************************************************
 480  * IDefClF_fnLockServer
 481  */
 482 static HRESULT WINAPI IDefClF_fnLockServer(LPCLASSFACTORY iface, BOOL fLock)
 483 {
 484         IDefClFImpl *This = (IDefClFImpl *)iface;
 485         TRACE("%p->(0x%x), not implemented\n",This, fLock);
 486         return E_NOTIMPL;
 487 }
 488
 489 static const IClassFactoryVtbl dclfvt =
 490 {
 491     IDefClF_fnQueryInterface,
 492     IDefClF_fnAddRef,
 493   IDefClF_fnRelease,
 494   IDefClF_fnCreateInstance,
 495   IDefClF_fnLockServer
 496 };
 497
 498 /******************************************************************************
 499  * SHCreateDefClassObject                       [SHELL32.70]
 500  */
 501 HRESULT WINAPI SHCreateDefClassObject(
 502         REFIID  riid,
 503         LPVOID* ppv,
 504         LPFNCREATEINSTANCE lpfnCI,      /* [in] create instance callback entry */
 505         LPDWORD pcRefDll,               /* [in/out] ref count of the dll */
 506         REFIID  riidInst)               /* [in] optional interface to the instance */
 507 {
 508         IClassFactory * pcf;
 509
 510         TRACE("%s %p %p %p %s\n",
 511               shdebugstr_guid(riid), ppv, lpfnCI, pcRefDll, shdebugstr_guid(riidInst));
 512
 513         if (! IsEqualCLSID(riid, &IID_IClassFactory) ) return E_NOINTERFACE;
 514         if (! (pcf = IDefClF_fnConstructor(lpfnCI, (PLONG)pcRefDll, riidInst))) return E_OUTOFMEMORY;
 515         *ppv = pcf;
 516         return NOERROR;
 517 }
 518
 519 /*************************************************************************
 520  *  DragAcceptFiles             [SHELL32.@]
 521  */
 522 void WINAPI DragAcceptFiles(HWND hWnd, BOOL b)
 523 {
 524         LONG exstyle;
 525
 526         if( !IsWindow(hWnd) ) return;
 527         exstyle = GetWindowLongPtrA(hWnd,GWL_EXSTYLE);
 528         if (b)
 529           exstyle |= WS_EX_ACCEPTFILES;
 530         else
 531           exstyle &= ~WS_EX_ACCEPTFILES;
 532         SetWindowLongPtrA(hWnd,GWL_EXSTYLE,exstyle);
 533 }
 534
 535 /*************************************************************************
 536  * DragFinish           [SHELL32.@]
 537  */
 538 void WINAPI DragFinish(HDROP h)
 539 {
 540         TRACE("\n");
 541         GlobalFree(h);
 542 }
 543
 544 /*************************************************************************
 545  * DragQueryPoint               [SHELL32.@]
 546  */
 547 BOOL WINAPI DragQueryPoint(HDROP hDrop, POINT *p)
 548 {
 549         DROPFILES *lpDropFileStruct;
 550         BOOL bRet;
 551
 552         TRACE("\n");
 553
 554         lpDropFileStruct = GlobalLock(hDrop);
 555
 556         *p = lpDropFileStruct->pt;
 557         bRet = lpDropFileStruct->fNC;
 558
 559         GlobalUnlock(hDrop);
 560         return bRet;
 561 }
 562
 563 /*************************************************************************
 564  *  DragQueryFileA              [SHELL32.@]
 565  *  DragQueryFile               [SHELL32.@]
 566  */
 567 UINT WINAPI DragQueryFileA(
 568         HDROP hDrop,
 569         UINT lFile,
 570         LPSTR lpszFile,
 571         UINT lLength)
 572 {
 573         LPSTR lpDrop;
 574         UINT i = 0;
 575         DROPFILES *lpDropFileStruct = GlobalLock(hDrop);
 576
 577         TRACE("(%p, %x, %p, %u)\n",     hDrop,lFile,lpszFile,lLength);
 578
 579         if(!lpDropFileStruct) goto end;
 580
 581         lpDrop = (LPSTR) lpDropFileStruct + lpDropFileStruct->pFiles;
 582
 583         if(lpDropFileStruct->fWide) {
 584             LPWSTR lpszFileW = NULL;
 585
 586             if(lpszFile) {
 587                 lpszFileW = HeapAlloc(GetProcessHeap(), 0, lLength*sizeof(WCHAR));
 588                 if(lpszFileW == NULL) {
 589                     goto end;
 590                 }
 591             }
 592             i = DragQueryFileW(hDrop, lFile, lpszFileW, lLength);
 593
 594             if(lpszFileW) {
 595                 WideCharToMultiByte(CP_ACP, 0, lpszFileW, -1, lpszFile, lLength, 0, NULL);
 596                 HeapFree(GetProcessHeap(), 0, lpszFileW);
 597             }
 598             goto end;
 599         }
 600
 601         while (i++ < lFile)
 602         {
 603           while (*lpDrop++); /* skip filename */
 604           if (!*lpDrop)
 605           {
 606             i = (lFile == 0xFFFFFFFF) ? i : 0;
 607             goto end;
 608           }
 609         }
 610
 611         i = strlen(lpDrop);
 612         if (!lpszFile ) goto end;   /* needed buffer size */
 613         lstrcpynA (lpszFile, lpDrop, lLength);
 614 end:
 615         GlobalUnlock(hDrop);
 616         return i;
 617 }
 618
 619 /*************************************************************************
 620  *  DragQueryFileW              [SHELL32.@]
 621  */
 622 UINT WINAPI DragQueryFileW(
 623         HDROP hDrop,
 624         UINT lFile,
 625         LPWSTR lpszwFile,
 626         UINT lLength)
 627 {
 628         LPWSTR lpwDrop;
 629         UINT i = 0;
 630         DROPFILES *lpDropFileStruct = GlobalLock(hDrop);
 631
 632         TRACE("(%p, %x, %p, %u)\n", hDrop,lFile,lpszwFile,lLength);
 633
 634         if(!lpDropFileStruct) goto end;
 635
 636         lpwDrop = (LPWSTR) ((LPSTR)lpDropFileStruct + lpDropFileStruct->pFiles);
 637
 638         if(lpDropFileStruct->fWide == FALSE) {
 639             LPSTR lpszFileA = NULL;
 640
 641             if(lpszwFile) {
 642                 lpszFileA = HeapAlloc(GetProcessHeap(), 0, lLength);
 643                 if(lpszFileA == NULL) {
 644                     goto end;
 645                 }
 646             }
 647             i = DragQueryFileA(hDrop, lFile, lpszFileA, lLength);
 648
 649             if(lpszFileA) {
 650                 MultiByteToWideChar(CP_ACP, 0, lpszFileA, -1, lpszwFile, lLength);
 651                 HeapFree(GetProcessHeap(), 0, lpszFileA);
 652             }
 653             goto end;
 654         }
 655
 656         i = 0;
 657         while (i++ < lFile)
 658         {
 659           while (*lpwDrop++); /* skip filename */
 660           if (!*lpwDrop)
 661           {
 662             i = (lFile == 0xFFFFFFFF) ? i : 0;
 663             goto end;
 664           }
 665         }
 666
 667         i = wcslen(lpwDrop);
 668         if ( !lpszwFile) goto end;   /* needed buffer size */
 669         lstrcpynW (lpszwFile, lpwDrop, lLength);
 670 end:
 671         GlobalUnlock(hDrop);
 672         return i;
 673 }