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 const WCHAR sShell32[12] = {'S','H','E','L','L','3','2','.','D','L','L','\0'};
  53 const WCHAR sOLE32[10] = {'O','L','E','3','2','.','D','L','L','\0'};
  54
  55 HINSTANCE hShellOle32 = 0;
  56 /**************************************************************************
  57  * Default ClassFactory types
  58  */
  59 typedef HRESULT (CALLBACK *LPFNCREATEINSTANCE)(IUnknown* pUnkOuter, REFIID riid, LPVOID* ppvObject);
  60 IClassFactory * IDefClF_fnConstructor(LPFNCREATEINSTANCE lpfnCI, PLONG pcRefDll, REFIID riidInst);
  61
  62 /* this table contains all CLSID's of shell32 objects */
  63 struct {
  64         REFIID                  riid;
  65         LPFNCREATEINSTANCE      lpfnCI;
  66 } InterfaceTable[] = {
  67         {&CLSID_ShellFSFolder,  &IFSFolder_Constructor},
  68         {&CLSID_MyComputer,     &ISF_MyComputer_Constructor},
  69         {&CLSID_ShellDesktop,   &ISF_Desktop_Constructor},
  70         {&CLSID_ShellLink,      &IShellLink_Constructor},
  71         {&CLSID_DragDropHelper, &IDropTargetHelper_Constructor},
  72         {&CLSID_ControlPanel,   &IControlPanel_Constructor},
  73         {&CLSID_AutoComplete,   &IAutoComplete_Constructor},
  74         {&CLSID_UnixFolder,     &UnixFolder_Constructor},
  75         {&CLSID_UnixDosFolder,  &UnixDosFolder_Constructor},
  76         {&CLSID_FolderShortcut, &FolderShortcut_Constructor},
  77         {&CLSID_MyDocuments,    &MyDocuments_Constructor},
  78         {NULL,NULL}
  79 };
  80
  81 /*************************************************************************
  82  * SHCoCreateInstance [SHELL32.102]
  83  *
  84  * NOTES
  85  *     exported by ordinal
  86  */
  87
  88 /* FIXME: this should be SHLWAPI.24 since we can't yet import by ordinal */
  89
  90 DWORD WINAPI __SHGUIDToStringW (REFGUID guid, LPWSTR str)
  91 {
  92     WCHAR sFormat[52] = {'{','%','0','8','l','x','-','%','0','4',
  93                          'x','-','%','0','4','x','-','%','0','2',
  94                          'x','%','0','2','x','-','%','0','2','x',
  95                          '%','0','2','x','%','0','2','x','%','0',
  96                          '2','x','%','0','2','x','%','0','2','x',
  97                          '}','\0'};
  98
  99     return wsprintfW ( str, sFormat,
 100              guid->Data1, guid->Data2, guid->Data3,
 101              guid->Data4[0], guid->Data4[1], guid->Data4[2], guid->Data4[3],
 102              guid->Data4[4], guid->Data4[5], guid->Data4[6], guid->Data4[7] );
 103
 104 }
 105
 106 /************************************************************************/
 107
 108 HRESULT WINAPI SHCoCreateInstance(
 109         LPCWSTR aclsid,
 110         const CLSID *clsid,
 111         LPUNKNOWN pUnkOuter,
 112         REFIID refiid,
 113         LPVOID *ppv)
 114 {
 115         DWORD   hres;
 116         IID     iid;
 117         CLSID * myclsid = (CLSID*)clsid;
 118         WCHAR   sKeyName[MAX_PATH];
 119         const   WCHAR sCLSID[7] = {'C','L','S','I','D','\\','\0'};
 120         WCHAR   sClassID[60];
 121         const WCHAR sInProcServer32[16] ={'\\','I','n','p','r','o','c','S','e','r','v','e','r','3','2','\0'};
 122         const WCHAR sLoadWithoutCOM[15] ={'L','o','a','d','W','i','t','h','o','u','t','C','O','M','\0'};
 123         WCHAR   sDllPath[MAX_PATH];
 124         HKEY    hKey;
 125         DWORD   dwSize;
 126         BOOLEAN bLoadFromShell32 = FALSE;
 127         BOOLEAN bLoadWithoutCOM = FALSE;
 128         IClassFactory * pcf = NULL;
 129
 130         if(!ppv) return E_POINTER;
 131         *ppv=NULL;
 132
 133         /* if the clsid is a string, convert it */
 134         if (!clsid)
 135         {
 136           if (!aclsid) return REGDB_E_CLASSNOTREG;
 137           SHCLSIDFromStringW(aclsid, &iid);
 138           myclsid = &iid;
 139         }
 140
 141         TRACE("(%p,%s,unk:%p,%s,%p)\n",
 142                 aclsid,shdebugstr_guid(myclsid),pUnkOuter,shdebugstr_guid(refiid),ppv);
 143
 144         /* we look up the dll path in the registry */
 145         __SHGUIDToStringW(myclsid, sClassID);
 146         lstrcpyW(sKeyName, sCLSID);
 147         lstrcatW(sKeyName, sClassID);
 148         lstrcatW(sKeyName, sInProcServer32);
 149
 150         if (ERROR_SUCCESS == RegOpenKeyExW(HKEY_CLASSES_ROOT, sKeyName, 0, KEY_READ, &hKey)) {
 151             dwSize = sizeof(sDllPath);
 152             SHQueryValueExW(hKey, NULL, 0,0, sDllPath, &dwSize );
 153
 154             /* if a special registry key is set, we load a shell extension without help of OLE32 */
 155             bLoadWithoutCOM = (ERROR_SUCCESS == SHQueryValueExW(hKey, sLoadWithoutCOM, 0, 0, 0, 0));
 156
 157             /* if the com object is inside shell32, omit use of ole32 */
 158             bLoadFromShell32 = (0==lstrcmpiW( PathFindFileNameW(sDllPath), sShell32));
 159
 160             RegCloseKey (hKey);
 161         } else {
 162             /* since we can't find it in the registry we try internally */
 163             bLoadFromShell32 = TRUE;
 164         }
 165
 166         TRACE("WithoutCom=%u FromShell=%u\n", bLoadWithoutCOM, bLoadFromShell32);
 167
 168         /* now we create an instance */
 169         if (bLoadFromShell32) {
 170             if (! SUCCEEDED(DllGetClassObject(myclsid, &IID_IClassFactory,(LPVOID*)&pcf))) {
 171                 ERR("LoadFromShell failed for CLSID=%s\n", shdebugstr_guid(myclsid));
 172             }
 173         } else if (bLoadWithoutCOM) {
 174
 175             /* load an external dll without ole32 */
 176             HANDLE hLibrary;
 177             typedef HRESULT (CALLBACK *DllGetClassObjectFunc)(REFCLSID clsid, REFIID iid, LPVOID *ppv);
 178             DllGetClassObjectFunc DllGetClassObject;
 179
 180             if ((hLibrary = LoadLibraryExW(sDllPath, 0, LOAD_WITH_ALTERED_SEARCH_PATH)) == 0) {
 181                 ERR("couldn't load InprocServer32 dll %s\n", debugstr_w(sDllPath));
 182                 hres = E_ACCESSDENIED;
 183                 goto end;
 184             } else if (!(DllGetClassObject = (DllGetClassObjectFunc)GetProcAddress(hLibrary, "DllGetClassObject"))) {
 185                 ERR("couldn't find function DllGetClassObject in %s\n", debugstr_w(sDllPath));
 186                 FreeLibrary( hLibrary );
 187                 hres = E_ACCESSDENIED;
 188                 goto end;
 189             } else if (! SUCCEEDED(hres = DllGetClassObject(myclsid, &IID_IClassFactory, (LPVOID*)&pcf))) {
 190                     TRACE("GetClassObject failed 0x%08lx\n", hres);
 191                     goto end;
 192             }
 193
 194         } else {
 195
 196             /* load an external dll in the usual way */
 197             hres = CoCreateInstance(myclsid, pUnkOuter, CLSCTX_INPROC_SERVER, refiid, ppv);
 198             goto end;
 199         }
 200
 201         /* here we should have a ClassFactory */
 202         if (!pcf) return E_ACCESSDENIED;
 203
 204         hres = IClassFactory_CreateInstance(pcf, pUnkOuter, refiid, ppv);
 205         IClassFactory_Release(pcf);
 206 end:
 207         if(hres!=S_OK)
 208         {
 209           ERR("failed (0x%08lx) to create CLSID:%s IID:%s\n",
 210               hres, shdebugstr_guid(myclsid), shdebugstr_guid(refiid));
 211           ERR("class not found in registry\n");
 212         }
 213
 214         TRACE("-- instance: %p\n",*ppv);
 215         return hres;
 216 }
 217
 218 /*************************************************************************
 219  * DllGetClassObject     [SHELL32.@]
 220  * SHDllGetClassObject   [SHELL32.128]
 221  */
 222 HRESULT WINAPI DllGetClassObject(REFCLSID rclsid, REFIID iid, LPVOID *ppv)
 223 {
 224         HRESULT hres = E_OUTOFMEMORY;
 225         IClassFactory * pcf = NULL;
 226         int i;
 227
 228         TRACE("CLSID:%s,IID:%s\n",shdebugstr_guid(rclsid),shdebugstr_guid(iid));
 229
 230         if (!ppv) return E_INVALIDARG;
 231         *ppv = NULL;
 232
 233         /* search our internal interface table */
 234         for(i=0;InterfaceTable[i].riid;i++) {
 235             if(IsEqualIID(InterfaceTable[i].riid, rclsid)) {
 236                 TRACE("index[%u]\n", i);
 237                 pcf = IDefClF_fnConstructor(InterfaceTable[i].lpfnCI, NULL, NULL);
 238             }
 239         }
 240
 241         if (!pcf) {
 242             FIXME("failed for CLSID=%s\n", shdebugstr_guid(rclsid));
 243             return CLASS_E_CLASSNOTAVAILABLE;
 244         }
 245
 246         hres = IClassFactory_QueryInterface(pcf, iid, ppv);
 247         IClassFactory_Release(pcf);
 248
 249         TRACE("-- pointer to class factory: %p\n",*ppv);
 250         return hres;
 251 }
 252
 253 /*************************************************************************
 254  * SHCLSIDFromString                            [SHELL32.147]
 255  *
 256  * NOTES
 257  *     exported by ordinal
 258  */
 259 DWORD WINAPI SHCLSIDFromStringA (LPCSTR clsid, CLSID *id)
 260 {
 261     WCHAR buffer[40];
 262     TRACE("(%p(%s) %p)\n", clsid, clsid, id);
 263     if (!MultiByteToWideChar( CP_ACP, 0, clsid, -1, buffer, sizeof(buffer)/sizeof(WCHAR) ))
 264         return CO_E_CLASSSTRING;
 265     return CLSIDFromString( buffer, id );
 266 }
 267 DWORD WINAPI SHCLSIDFromStringW (LPCWSTR clsid, CLSID *id)
 268 {
 269         TRACE("(%p(%s) %p)\n", clsid, debugstr_w(clsid), id);
 270         return CLSIDFromString((LPWSTR)clsid, id);
 271 }
 272 DWORD WINAPI SHCLSIDFromStringAW (LPVOID clsid, CLSID *id)
 273 {
 274         if (SHELL_OsIsUnicode())
 275           return SHCLSIDFromStringW (clsid, id);
 276         return SHCLSIDFromStringA (clsid, id);
 277 }
 278
 279 /*************************************************************************
 280  *      Shell Memory Allocator
 281  */
 282
 283 /* set the vtable later */
 284 static const IMallocVtbl VT_Shell_IMalloc32;
 285
 286 /* this is the static object instance */
 287 typedef struct {
 288         const IMallocVtbl *lpVtbl;
 289         DWORD dummy;
 290 } _ShellMalloc;
 291
 292 static _ShellMalloc Shell_Malloc = { &VT_Shell_IMalloc32,1};
 293
 294 /* this is the global allocator of shell32 */
 295 static IMalloc * ShellTaskAllocator = NULL;
 296
 297 /******************************************************************************
 298  *              IShellMalloc_QueryInterface        [VTABLE]
 299  */
 300 static HRESULT WINAPI IShellMalloc_fnQueryInterface(LPMALLOC iface, REFIID refiid, LPVOID *obj)
 301 {
 302         TRACE("(%s,%p)\n",shdebugstr_guid(refiid),obj);
 303         if (IsEqualIID(refiid, &IID_IUnknown) || IsEqualIID(refiid, &IID_IMalloc)) {
 304                 *obj = (LPMALLOC) &Shell_Malloc;
 305                 return S_OK;
 306         }
 307         return E_NOINTERFACE;
 308 }
 309
 310 /******************************************************************************
 311  *              IShellMalloc_AddRefRelease        [VTABLE]
 312  */
 313 static ULONG WINAPI IShellMalloc_fnAddRefRelease(LPMALLOC iface)
 314 {
 315         return 1;
 316 }
 317
 318 /******************************************************************************
 319  *              IShellMalloc_Alloc [VTABLE]
 320  */
 321 static LPVOID WINAPI IShellMalloc_fnAlloc(LPMALLOC iface, DWORD cb)
 322 {
 323         LPVOID addr;
 324
 325         addr = (LPVOID) LocalAlloc(LMEM_ZEROINIT, cb);
 326         TRACE("(%p,%ld);\n",addr,cb);
 327         return addr;
 328 }
 329
 330 /******************************************************************************
 331  *              IShellMalloc_Realloc [VTABLE]
 332  */
 333 static LPVOID WINAPI IShellMalloc_fnRealloc(LPMALLOC iface, LPVOID pv, DWORD cb)
 334 {
 335         LPVOID addr;
 336
 337         if (pv) {
 338                 if (cb) {
 339                         addr = (LPVOID) LocalReAlloc((HANDLE) pv, cb, LMEM_ZEROINIT | LMEM_MOVEABLE);
 340                 } else {
 341                         LocalFree((HANDLE) pv);
 342                         addr = NULL;
 343                 }
 344         } else {
 345                 if (cb) {
 346                         addr = (LPVOID) LocalAlloc(LMEM_ZEROINIT, cb);
 347                 } else {
 348                         addr = NULL;
 349                 }
 350         }
 351
 352         TRACE("(%p->%p,%ld)\n",pv,addr,cb);
 353         return addr;
 354 }
 355
 356 /******************************************************************************
 357  *              IShellMalloc_Free [VTABLE]
 358  */
 359 static VOID WINAPI IShellMalloc_fnFree(LPMALLOC iface, LPVOID pv)
 360 {
 361         TRACE("(%p)\n",pv);
 362         LocalFree((HANDLE) pv);
 363 }
 364
 365 /******************************************************************************
 366  *              IShellMalloc_GetSize [VTABLE]
 367  */
 368 static DWORD WINAPI IShellMalloc_fnGetSize(LPMALLOC iface, LPVOID pv)
 369 {
 370         DWORD cb = (DWORD) LocalSize((HANDLE)pv);
 371         TRACE("(%p,%ld)\n", pv, cb);
 372         return cb;
 373 }
 374
 375 /******************************************************************************
 376  *              IShellMalloc_DidAlloc [VTABLE]
 377  */
 378 static INT WINAPI IShellMalloc_fnDidAlloc(LPMALLOC iface, LPVOID pv)
 379 {
 380         TRACE("(%p)\n",pv);
 381         return -1;
 382 }
 383
 384 /******************************************************************************
 385  *              IShellMalloc_HeapMinimize [VTABLE]
 386  */
 387 static VOID WINAPI IShellMalloc_fnHeapMinimize(LPMALLOC iface)
 388 {
 389         TRACE("()\n");
 390 }
 391
 392 static const IMallocVtbl VT_Shell_IMalloc32 =
 393 {
 394         IShellMalloc_fnQueryInterface,
 395         IShellMalloc_fnAddRefRelease,
 396         IShellMalloc_fnAddRefRelease,
 397         IShellMalloc_fnAlloc,
 398         IShellMalloc_fnRealloc,
 399         IShellMalloc_fnFree,
 400         IShellMalloc_fnGetSize,
 401         IShellMalloc_fnDidAlloc,
 402         IShellMalloc_fnHeapMinimize
 403 };
 404
 405 /*************************************************************************
 406  *                       SHGetMalloc                    [SHELL32.@]
 407  *
 408  * Return the shell IMalloc interface.
 409  *
 410  * PARAMS
 411  *  lpmal [O] Destination for IMalloc interface.
 412  *
 413  * RETURNS
 414  *  Success: S_OK. lpmal contains the shells IMalloc interface.
 415  *  Failure. An HRESULT error code.
 416  *
 417  * NOTES
 418  *  This function will use CoGetMalloc() if OLE32.DLL is already loaded.
 419  *  If not it uses an internal implementation as a fallback.
 420  */
 421 HRESULT WINAPI SHGetMalloc(LPMALLOC *lpmal)
 422 {
 423         TRACE("(%p)\n", lpmal);
 424
 425         if (!ShellTaskAllocator)
 426         {
 427                 HMODULE hOle32 = GetModuleHandleA("OLE32.DLL");
 428                 /* this is very suspect. we should not being using a different
 429                  * allocator from deallocator based on something undeterministic
 430                  * like whether ole32 is loaded. as it happens currently, they
 431                  * both map to the same allocator deep down, but this could
 432                  * change in the future. */
 433                 if(hOle32) {
 434                         CoGetMalloc(MEMCTX_TASK, &ShellTaskAllocator);
 435                         TRACE("got ole32 IMalloc\n");
 436                 }
 437                 if(!ShellTaskAllocator) {
 438                         ShellTaskAllocator = (IMalloc* ) &Shell_Malloc;
 439                         TRACE("use fallback allocator\n");
 440                 }
 441         }
 442         *lpmal = ShellTaskAllocator;
 443         return  S_OK;
 444 }
 445
 446 /*************************************************************************
 447  * SHAlloc                                      [SHELL32.196]
 448  *
 449  * NOTES
 450  *     exported by ordinal
 451  */
 452 LPVOID WINAPI SHAlloc(DWORD len)
 453 {
 454         IMalloc * ppv;
 455         LPBYTE ret;
 456
 457         if (!ShellTaskAllocator) SHGetMalloc(&ppv);
 458
 459         ret = (LPVOID) IMalloc_Alloc(ShellTaskAllocator, len);
 460         TRACE("%lu bytes at %p\n",len, ret);
 461         return (LPVOID)ret;
 462 }
 463
 464 /*************************************************************************
 465  * SHFree                                       [SHELL32.195]
 466  *
 467  * NOTES
 468  *     exported by ordinal
 469  */
 470 void WINAPI SHFree(LPVOID pv)
 471 {
 472         IMalloc * ppv;
 473
 474         TRACE("%p\n",pv);
 475         if (!ShellTaskAllocator) SHGetMalloc(&ppv);
 476         IMalloc_Free(ShellTaskAllocator, pv);
 477 }
 478
 479 /*************************************************************************
 480  * SHGetDesktopFolder                   [SHELL32.@]
 481  */
 482 HRESULT WINAPI SHGetDesktopFolder(IShellFolder **psf)
 483 {
 484         HRESULT hres = S_OK;
 485         TRACE("\n");
 486
 487         if(!psf) return E_INVALIDARG;
 488         *psf = NULL;
 489         hres = ISF_Desktop_Constructor(NULL, &IID_IShellFolder,(LPVOID*)psf);
 490
 491         TRACE("-- %p->(%p)\n",psf, *psf);
 492         return hres;
 493 }
 494 /**************************************************************************
 495  * Default ClassFactory Implementation
 496  *
 497  * SHCreateDefClassObject
 498  *
 499  * NOTES
 500  *  Helper function for dlls without their own classfactory.
 501  *  A generic classfactory is returned.
 502  *  When the CreateInstance of the cf is called the callback is executed.
 503  */
 504
 505 typedef struct
 506 {
 507     const IClassFactoryVtbl    *lpVtbl;
 508     LONG                        ref;
 509     CLSID                       *rclsid;
 510     LPFNCREATEINSTANCE          lpfnCI;
 511     const IID *                 riidInst;
 512     LONG *                      pcRefDll; /* pointer to refcounter in external dll (ugrrr...) */
 513 } IDefClFImpl;
 514
 515 static const IClassFactoryVtbl dclfvt;
 516
 517 /**************************************************************************
 518  *  IDefClF_fnConstructor
 519  */
 520
 521 IClassFactory * IDefClF_fnConstructor(LPFNCREATEINSTANCE lpfnCI, PLONG pcRefDll, REFIID riidInst)
 522 {
 523         IDefClFImpl* lpclf;
 524
 525         lpclf = HeapAlloc(GetProcessHeap(),0,sizeof(IDefClFImpl));
 526         lpclf->ref = 1;
 527         lpclf->lpVtbl = &dclfvt;
 528         lpclf->lpfnCI = lpfnCI;
 529         lpclf->pcRefDll = pcRefDll;
 530
 531         if (pcRefDll) InterlockedIncrement(pcRefDll);
 532         lpclf->riidInst = riidInst;
 533
 534         TRACE("(%p)%s\n",lpclf, shdebugstr_guid(riidInst));
 535         return (LPCLASSFACTORY)lpclf;
 536 }
 537 /**************************************************************************
 538  *  IDefClF_fnQueryInterface
 539  */
 540 static HRESULT WINAPI IDefClF_fnQueryInterface(
 541   LPCLASSFACTORY iface, REFIID riid, LPVOID *ppvObj)
 542 {
 543         IDefClFImpl *This = (IDefClFImpl *)iface;
 544
 545         TRACE("(%p)->(%s)\n",This,shdebugstr_guid(riid));
 546
 547         *ppvObj = NULL;
 548
 549         if(IsEqualIID(riid, &IID_IUnknown) || IsEqualIID(riid, &IID_IClassFactory)) {
 550           *ppvObj = This;
 551           InterlockedIncrement(&This->ref);
 552           return S_OK;
 553         }
 554
 555         TRACE("-- E_NOINTERFACE\n");
 556         return E_NOINTERFACE;
 557 }
 558 /******************************************************************************
 559  * IDefClF_fnAddRef
 560  */
 561 static ULONG WINAPI IDefClF_fnAddRef(LPCLASSFACTORY iface)
 562 {
 563         IDefClFImpl *This = (IDefClFImpl *)iface;
 564         ULONG refCount = InterlockedIncrement(&This->ref);
 565
 566         TRACE("(%p)->(count=%lu)\n", This, refCount - 1);
 567
 568         return refCount;
 569 }
 570 /******************************************************************************
 571  * IDefClF_fnRelease
 572  */
 573 static ULONG WINAPI IDefClF_fnRelease(LPCLASSFACTORY iface)
 574 {
 575         IDefClFImpl *This = (IDefClFImpl *)iface;
 576         ULONG refCount = InterlockedDecrement(&This->ref);
 577
 578         TRACE("(%p)->(count=%lu)\n", This, refCount + 1);
 579
 580         if (!refCount)
 581         {
 582           if (This->pcRefDll) InterlockedDecrement(This->pcRefDll);
 583
 584           TRACE("-- destroying IClassFactory(%p)\n",This);
 585           HeapFree(GetProcessHeap(),0,This);
 586           return 0;
 587         }
 588         return refCount;
 589 }
 590 /******************************************************************************
 591  * IDefClF_fnCreateInstance
 592  */
 593 static HRESULT WINAPI IDefClF_fnCreateInstance(
 594   LPCLASSFACTORY iface, LPUNKNOWN pUnkOuter, REFIID riid, LPVOID *ppvObject)
 595 {
 596         IDefClFImpl *This = (IDefClFImpl *)iface;
 597
 598         TRACE("%p->(%p,%s,%p)\n",This,pUnkOuter,shdebugstr_guid(riid),ppvObject);
 599
 600         *ppvObject = NULL;
 601
 602         if ( This->riidInst==NULL ||
 603              IsEqualCLSID(riid, This->riidInst) ||
 604              IsEqualCLSID(riid, &IID_IUnknown) )
 605         {
 606           return This->lpfnCI(pUnkOuter, riid, ppvObject);
 607         }
 608
 609         ERR("unknown IID requested %s\n",shdebugstr_guid(riid));
 610         return E_NOINTERFACE;
 611 }
 612 /******************************************************************************
 613  * IDefClF_fnLockServer
 614  */
 615 static HRESULT WINAPI IDefClF_fnLockServer(LPCLASSFACTORY iface, BOOL fLock)
 616 {
 617         IDefClFImpl *This = (IDefClFImpl *)iface;
 618         TRACE("%p->(0x%x), not implemented\n",This, fLock);
 619         return E_NOTIMPL;
 620 }
 621
 622 static const IClassFactoryVtbl dclfvt =
 623 {
 624     IDefClF_fnQueryInterface,
 625     IDefClF_fnAddRef,
 626   IDefClF_fnRelease,
 627   IDefClF_fnCreateInstance,
 628   IDefClF_fnLockServer
 629 };
 630
 631 /******************************************************************************
 632  * SHCreateDefClassObject                       [SHELL32.70]
 633  */
 634 HRESULT WINAPI SHCreateDefClassObject(
 635         REFIID  riid,
 636         LPVOID* ppv,
 637         LPFNCREATEINSTANCE lpfnCI,      /* [in] create instance callback entry */
 638         LPDWORD pcRefDll,               /* [in/out] ref count of the dll */
 639         REFIID  riidInst)               /* [in] optional interface to the instance */
 640 {
 641         IClassFactory * pcf;
 642
 643         TRACE("%s %p %p %p %s\n",
 644               shdebugstr_guid(riid), ppv, lpfnCI, pcRefDll, shdebugstr_guid(riidInst));
 645
 646         if (! IsEqualCLSID(riid, &IID_IClassFactory) ) return E_NOINTERFACE;
 647         if (! (pcf = IDefClF_fnConstructor(lpfnCI, (PLONG)pcRefDll, riidInst))) return E_OUTOFMEMORY;
 648         *ppv = pcf;
 649         return NOERROR;
 650 }
 651
 652 /*************************************************************************
 653  *  DragAcceptFiles             [SHELL32.@]
 654  */
 655 void WINAPI DragAcceptFiles(HWND hWnd, BOOL b)
 656 {
 657         LONG exstyle;
 658
 659         if( !IsWindow(hWnd) ) return;
 660         exstyle = GetWindowLongA(hWnd,GWL_EXSTYLE);
 661         if (b)
 662           exstyle |= WS_EX_ACCEPTFILES;
 663         else
 664           exstyle &= ~WS_EX_ACCEPTFILES;
 665         SetWindowLongA(hWnd,GWL_EXSTYLE,exstyle);
 666 }
 667
 668 /*************************************************************************
 669  * DragFinish           [SHELL32.@]
 670  */
 671 void WINAPI DragFinish(HDROP h)
 672 {
 673         TRACE("\n");
 674         GlobalFree((HGLOBAL)h);
 675 }
 676
 677 /*************************************************************************
 678  * DragQueryPoint               [SHELL32.@]
 679  */
 680 BOOL WINAPI DragQueryPoint(HDROP hDrop, POINT *p)
 681 {
 682         DROPFILES *lpDropFileStruct;
 683         BOOL bRet;
 684
 685         TRACE("\n");
 686
 687         lpDropFileStruct = (DROPFILES *) GlobalLock(hDrop);
 688
 689         *p = lpDropFileStruct->pt;
 690         bRet = lpDropFileStruct->fNC;
 691
 692         GlobalUnlock(hDrop);
 693         return bRet;
 694 }
 695
 696 /*************************************************************************
 697  *  DragQueryFileA              [SHELL32.@]
 698  *  DragQueryFile               [SHELL32.@]
 699  */
 700 UINT WINAPI DragQueryFileA(
 701         HDROP hDrop,
 702         UINT lFile,
 703         LPSTR lpszFile,
 704         UINT lLength)
 705 {
 706         LPSTR lpDrop;
 707         UINT i = 0;
 708         DROPFILES *lpDropFileStruct = (DROPFILES *) GlobalLock(hDrop);
 709
 710         TRACE("(%p, %x, %p, %u)\n",     hDrop,lFile,lpszFile,lLength);
 711
 712         if(!lpDropFileStruct) goto end;
 713
 714         lpDrop = (LPSTR) lpDropFileStruct + lpDropFileStruct->pFiles;
 715
 716         if(lpDropFileStruct->fWide) {
 717             LPWSTR lpszFileW = NULL;
 718
 719             if(lpszFile) {
 720                 lpszFileW = HeapAlloc(GetProcessHeap(), 0, lLength*sizeof(WCHAR));
 721                 if(lpszFileW == NULL) {
 722                     goto end;
 723                 }
 724             }
 725             i = DragQueryFileW(hDrop, lFile, lpszFileW, lLength);
 726
 727             if(lpszFileW) {
 728                 WideCharToMultiByte(CP_ACP, 0, lpszFileW, -1, lpszFile, lLength, 0, NULL);
 729                 HeapFree(GetProcessHeap(), 0, lpszFileW);
 730             }
 731             goto end;
 732         }
 733
 734         while (i++ < lFile)
 735         {
 736           while (*lpDrop++); /* skip filename */
 737           if (!*lpDrop)
 738           {
 739             i = (lFile == 0xFFFFFFFF) ? i : 0;
 740             goto end;
 741           }
 742         }
 743
 744         i = strlen(lpDrop);
 745         i++;
 746         if (!lpszFile ) goto end;   /* needed buffer size */
 747         i = (lLength > i) ? i : lLength;
 748         lstrcpynA (lpszFile,  lpDrop,  i);
 749 end:
 750         GlobalUnlock(hDrop);
 751         return i;
 752 }
 753
 754 /*************************************************************************
 755  *  DragQueryFileW              [SHELL32.@]
 756  */
 757 UINT WINAPI DragQueryFileW(
 758         HDROP hDrop,
 759         UINT lFile,
 760         LPWSTR lpszwFile,
 761         UINT lLength)
 762 {
 763         LPWSTR lpwDrop;
 764         UINT i = 0;
 765         DROPFILES *lpDropFileStruct = (DROPFILES *) GlobalLock(hDrop);
 766
 767         TRACE("(%p, %x, %p, %u)\n", hDrop,lFile,lpszwFile,lLength);
 768
 769         if(!lpDropFileStruct) goto end;
 770
 771         lpwDrop = (LPWSTR) ((LPSTR)lpDropFileStruct + lpDropFileStruct->pFiles);
 772
 773         if(lpDropFileStruct->fWide == FALSE) {
 774             LPSTR lpszFileA = NULL;
 775
 776             if(lpszwFile) {
 777                 lpszFileA = HeapAlloc(GetProcessHeap(), 0, lLength);
 778                 if(lpszFileA == NULL) {
 779                     goto end;
 780                 }
 781             }
 782             i = DragQueryFileA(hDrop, lFile, lpszFileA, lLength);
 783
 784             if(lpszFileA) {
 785                 MultiByteToWideChar(CP_ACP, 0, lpszFileA, -1, lpszwFile, lLength);
 786                 HeapFree(GetProcessHeap(), 0, lpszFileA);
 787             }
 788             goto end;
 789         }
 790
 791         i = 0;
 792         while (i++ < lFile)
 793         {
 794           while (*lpwDrop++); /* skip filename */
 795           if (!*lpwDrop)
 796           {
 797             i = (lFile == 0xFFFFFFFF) ? i : 0;
 798             goto end;
 799           }
 800         }
 801
 802         i = strlenW(lpwDrop);
 803         i++;
 804         if ( !lpszwFile) goto end;   /* needed buffer size */
 805
 806         i = (lLength > i) ? i : lLength;
 807         lstrcpynW (lpszwFile, lpwDrop, i);
 808 end:
 809         GlobalUnlock(hDrop);
 810         return i;
 811 }