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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  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  */
 221 HRESULT WINAPI DllGetClassObject(REFCLSID rclsid, REFIID iid, LPVOID *ppv)
 222 {
 223         HRESULT hres = E_OUTOFMEMORY;
 224         IClassFactory * pcf = NULL;
 225         int i;
 226
 227         TRACE("CLSID:%s,IID:%s\n",shdebugstr_guid(rclsid),shdebugstr_guid(iid));
 228
 229         if (!ppv) return E_INVALIDARG;
 230         *ppv = NULL;
 231
 232         /* search our internal interface table */
 233         for(i=0;InterfaceTable[i].riid;i++) {
 234             if(IsEqualIID(InterfaceTable[i].riid, rclsid)) {
 235                 TRACE("index[%u]\n", i);
 236                 pcf = IDefClF_fnConstructor(InterfaceTable[i].lpfnCI, NULL, NULL);
 237             }
 238         }
 239
 240         if (!pcf) {
 241             FIXME("failed for CLSID=%s\n", shdebugstr_guid(rclsid));
 242             return CLASS_E_CLASSNOTAVAILABLE;
 243         }
 244
 245         hres = IClassFactory_QueryInterface(pcf, iid, ppv);
 246         IClassFactory_Release(pcf);
 247
 248         TRACE("-- pointer to class factory: %p\n",*ppv);
 249         return hres;
 250 }
 251
 252 /*************************************************************************
 253  * SHCLSIDFromString                            [SHELL32.147]
 254  *
 255  * NOTES
 256  *     exported by ordinal
 257  */
 258 DWORD WINAPI SHCLSIDFromStringA (LPCSTR clsid, CLSID *id)
 259 {
 260     WCHAR buffer[40];
 261     TRACE("(%p(%s) %p)\n", clsid, clsid, id);
 262     if (!MultiByteToWideChar( CP_ACP, 0, clsid, -1, buffer, sizeof(buffer)/sizeof(WCHAR) ))
 263         return CO_E_CLASSSTRING;
 264     return CLSIDFromString( buffer, id );
 265 }
 266 DWORD WINAPI SHCLSIDFromStringW (LPCWSTR clsid, CLSID *id)
 267 {
 268         TRACE("(%p(%s) %p)\n", clsid, debugstr_w(clsid), id);
 269         return CLSIDFromString((LPWSTR)clsid, id);
 270 }
 271 DWORD WINAPI SHCLSIDFromStringAW (LPVOID clsid, CLSID *id)
 272 {
 273         if (SHELL_OsIsUnicode())
 274           return SHCLSIDFromStringW (clsid, id);
 275         return SHCLSIDFromStringA (clsid, id);
 276 }
 277
 278 /*************************************************************************
 279  *      Shell Memory Allocator
 280  */
 281
 282 /* set the vtable later */
 283 static const IMallocVtbl VT_Shell_IMalloc32;
 284
 285 /* this is the static object instance */
 286 typedef struct {
 287         const IMallocVtbl *lpVtbl;
 288         DWORD dummy;
 289 } _ShellMalloc;
 290
 291 static _ShellMalloc Shell_Malloc = { &VT_Shell_IMalloc32,1};
 292
 293 /* this is the global allocator of shell32 */
 294 static IMalloc * ShellTaskAllocator = NULL;
 295
 296 /******************************************************************************
 297  *              IShellMalloc_QueryInterface        [VTABLE]
 298  */
 299 static HRESULT WINAPI IShellMalloc_fnQueryInterface(LPMALLOC iface, REFIID refiid, LPVOID *obj)
 300 {
 301         TRACE("(%s,%p)\n",shdebugstr_guid(refiid),obj);
 302         if (IsEqualIID(refiid, &IID_IUnknown) || IsEqualIID(refiid, &IID_IMalloc)) {
 303                 *obj = (LPMALLOC) &Shell_Malloc;
 304                 return S_OK;
 305         }
 306         return E_NOINTERFACE;
 307 }
 308
 309 /******************************************************************************
 310  *              IShellMalloc_AddRefRelease        [VTABLE]
 311  */
 312 static ULONG WINAPI IShellMalloc_fnAddRefRelease(LPMALLOC iface)
 313 {
 314         return 1;
 315 }
 316
 317 /******************************************************************************
 318  *              IShellMalloc_Alloc [VTABLE]
 319  */
 320 static LPVOID WINAPI IShellMalloc_fnAlloc(LPMALLOC iface, DWORD cb)
 321 {
 322         LPVOID addr;
 323
 324         addr = (LPVOID) LocalAlloc(LMEM_ZEROINIT, cb);
 325         TRACE("(%p,%ld);\n",addr,cb);
 326         return addr;
 327 }
 328
 329 /******************************************************************************
 330  *              IShellMalloc_Realloc [VTABLE]
 331  */
 332 static LPVOID WINAPI IShellMalloc_fnRealloc(LPMALLOC iface, LPVOID pv, DWORD cb)
 333 {
 334         LPVOID addr;
 335
 336         if (pv) {
 337                 if (cb) {
 338                         addr = (LPVOID) LocalReAlloc((HANDLE) pv, cb, LMEM_ZEROINIT | LMEM_MOVEABLE);
 339                 } else {
 340                         LocalFree((HANDLE) pv);
 341                         addr = NULL;
 342                 }
 343         } else {
 344                 if (cb) {
 345                         addr = (LPVOID) LocalAlloc(LMEM_ZEROINIT, cb);
 346                 } else {
 347                         addr = NULL;
 348                 }
 349         }
 350
 351         TRACE("(%p->%p,%ld)\n",pv,addr,cb);
 352         return addr;
 353 }
 354
 355 /******************************************************************************
 356  *              IShellMalloc_Free [VTABLE]
 357  */
 358 static VOID WINAPI IShellMalloc_fnFree(LPMALLOC iface, LPVOID pv)
 359 {
 360         TRACE("(%p)\n",pv);
 361         LocalFree((HANDLE) pv);
 362 }
 363
 364 /******************************************************************************
 365  *              IShellMalloc_GetSize [VTABLE]
 366  */
 367 static DWORD WINAPI IShellMalloc_fnGetSize(LPMALLOC iface, LPVOID pv)
 368 {
 369         DWORD cb = (DWORD) LocalSize((HANDLE)pv);
 370         TRACE("(%p,%ld)\n", pv, cb);
 371         return cb;
 372 }
 373
 374 /******************************************************************************
 375  *              IShellMalloc_DidAlloc [VTABLE]
 376  */
 377 static INT WINAPI IShellMalloc_fnDidAlloc(LPMALLOC iface, LPVOID pv)
 378 {
 379         TRACE("(%p)\n",pv);
 380         return -1;
 381 }
 382
 383 /******************************************************************************
 384  *              IShellMalloc_HeapMinimize [VTABLE]
 385  */
 386 static VOID WINAPI IShellMalloc_fnHeapMinimize(LPMALLOC iface)
 387 {
 388         TRACE("()\n");
 389 }
 390
 391 static const IMallocVtbl VT_Shell_IMalloc32 =
 392 {
 393         IShellMalloc_fnQueryInterface,
 394         IShellMalloc_fnAddRefRelease,
 395         IShellMalloc_fnAddRefRelease,
 396         IShellMalloc_fnAlloc,
 397         IShellMalloc_fnRealloc,
 398         IShellMalloc_fnFree,
 399         IShellMalloc_fnGetSize,
 400         IShellMalloc_fnDidAlloc,
 401         IShellMalloc_fnHeapMinimize
 402 };
 403
 404 /*************************************************************************
 405  *                       SHGetMalloc                    [SHELL32.@]
 406  *
 407  * Return the shell IMalloc interface.
 408  *
 409  * PARAMS
 410  *  lpmal [O] Destination for IMalloc interface.
 411  *
 412  * RETURNS
 413  *  Success: S_OK. lpmal contains the shells IMalloc interface.
 414  *  Failure. An HRESULT error code.
 415  *
 416  * NOTES
 417  *  This function will use CoGetMalloc() if OLE32.DLL is already loaded.
 418  *  If not it uses an internal implementation as a fallback.
 419  */
 420 HRESULT WINAPI SHGetMalloc(LPMALLOC *lpmal)
 421 {
 422         TRACE("(%p)\n", lpmal);
 423
 424         if (!ShellTaskAllocator)
 425         {
 426                 HMODULE hOle32 = GetModuleHandleA("OLE32.DLL");
 427                 /* this is very suspect. we should not being using a different
 428                  * allocator from deallocator based on something undeterministic
 429                  * like whether ole32 is loaded. as it happens currently, they
 430                  * both map to the same allocator deep down, but this could
 431                  * change in the future. */
 432                 if(hOle32) {
 433                         CoGetMalloc(MEMCTX_TASK, &ShellTaskAllocator);
 434                         TRACE("got ole32 IMalloc\n");
 435                 }
 436                 if(!ShellTaskAllocator) {
 437                         ShellTaskAllocator = (IMalloc* ) &Shell_Malloc;
 438                         TRACE("use fallback allocator\n");
 439                 }
 440         }
 441         *lpmal = ShellTaskAllocator;
 442         return  S_OK;
 443 }
 444
 445 /*************************************************************************
 446  * SHAlloc                                      [SHELL32.196]
 447  *
 448  * NOTES
 449  *     exported by ordinal
 450  */
 451 LPVOID WINAPI SHAlloc(DWORD len)
 452 {
 453         IMalloc * ppv;
 454         LPBYTE ret;
 455
 456         if (!ShellTaskAllocator) SHGetMalloc(&ppv);
 457
 458         ret = (LPVOID) IMalloc_Alloc(ShellTaskAllocator, len);
 459         TRACE("%lu bytes at %p\n",len, ret);
 460         return (LPVOID)ret;
 461 }
 462
 463 /*************************************************************************
 464  * SHFree                                       [SHELL32.195]
 465  *
 466  * NOTES
 467  *     exported by ordinal
 468  */
 469 void WINAPI SHFree(LPVOID pv)
 470 {
 471         IMalloc * ppv;
 472
 473         TRACE("%p\n",pv);
 474         if (!ShellTaskAllocator) SHGetMalloc(&ppv);
 475         IMalloc_Free(ShellTaskAllocator, pv);
 476 }
 477
 478 /*************************************************************************
 479  * SHGetDesktopFolder                   [SHELL32.@]
 480  */
 481 HRESULT WINAPI SHGetDesktopFolder(IShellFolder **psf)
 482 {
 483         HRESULT hres = S_OK;
 484         TRACE("\n");
 485
 486         if(!psf) return E_INVALIDARG;
 487         *psf = NULL;
 488         hres = ISF_Desktop_Constructor(NULL, &IID_IShellFolder,(LPVOID*)psf);
 489
 490         TRACE("-- %p->(%p)\n",psf, *psf);
 491         return hres;
 492 }
 493 /**************************************************************************
 494  * Default ClassFactory Implementation
 495  *
 496  * SHCreateDefClassObject
 497  *
 498  * NOTES
 499  *  Helper function for dlls without their own classfactory.
 500  *  A generic classfactory is returned.
 501  *  When the CreateInstance of the cf is called the callback is executed.
 502  */
 503
 504 typedef struct
 505 {
 506     const IClassFactoryVtbl    *lpVtbl;
 507     LONG                        ref;
 508     CLSID                       *rclsid;
 509     LPFNCREATEINSTANCE          lpfnCI;
 510     const IID *                 riidInst;
 511     LONG *                      pcRefDll; /* pointer to refcounter in external dll (ugrrr...) */
 512 } IDefClFImpl;
 513
 514 static const IClassFactoryVtbl dclfvt;
 515
 516 /**************************************************************************
 517  *  IDefClF_fnConstructor
 518  */
 519
 520 IClassFactory * IDefClF_fnConstructor(LPFNCREATEINSTANCE lpfnCI, PLONG pcRefDll, REFIID riidInst)
 521 {
 522         IDefClFImpl* lpclf;
 523
 524         lpclf = HeapAlloc(GetProcessHeap(),0,sizeof(IDefClFImpl));
 525         lpclf->ref = 1;
 526         lpclf->lpVtbl = &dclfvt;
 527         lpclf->lpfnCI = lpfnCI;
 528         lpclf->pcRefDll = pcRefDll;
 529
 530         if (pcRefDll) InterlockedIncrement(pcRefDll);
 531         lpclf->riidInst = riidInst;
 532
 533         TRACE("(%p)%s\n",lpclf, shdebugstr_guid(riidInst));
 534         return (LPCLASSFACTORY)lpclf;
 535 }
 536 /**************************************************************************
 537  *  IDefClF_fnQueryInterface
 538  */
 539 static HRESULT WINAPI IDefClF_fnQueryInterface(
 540   LPCLASSFACTORY iface, REFIID riid, LPVOID *ppvObj)
 541 {
 542         IDefClFImpl *This = (IDefClFImpl *)iface;
 543
 544         TRACE("(%p)->(%s)\n",This,shdebugstr_guid(riid));
 545
 546         *ppvObj = NULL;
 547
 548         if(IsEqualIID(riid, &IID_IUnknown) || IsEqualIID(riid, &IID_IClassFactory)) {
 549           *ppvObj = This;
 550           InterlockedIncrement(&This->ref);
 551           return S_OK;
 552         }
 553
 554         TRACE("-- E_NOINTERFACE\n");
 555         return E_NOINTERFACE;
 556 }
 557 /******************************************************************************
 558  * IDefClF_fnAddRef
 559  */
 560 static ULONG WINAPI IDefClF_fnAddRef(LPCLASSFACTORY iface)
 561 {
 562         IDefClFImpl *This = (IDefClFImpl *)iface;
 563         ULONG refCount = InterlockedIncrement(&This->ref);
 564
 565         TRACE("(%p)->(count=%lu)\n", This, refCount - 1);
 566
 567         return refCount;
 568 }
 569 /******************************************************************************
 570  * IDefClF_fnRelease
 571  */
 572 static ULONG WINAPI IDefClF_fnRelease(LPCLASSFACTORY iface)
 573 {
 574         IDefClFImpl *This = (IDefClFImpl *)iface;
 575         ULONG refCount = InterlockedDecrement(&This->ref);
 576
 577         TRACE("(%p)->(count=%lu)\n", This, refCount + 1);
 578
 579         if (!refCount)
 580         {
 581           if (This->pcRefDll) InterlockedDecrement(This->pcRefDll);
 582
 583           TRACE("-- destroying IClassFactory(%p)\n",This);
 584           HeapFree(GetProcessHeap(),0,This);
 585           return 0;
 586         }
 587         return refCount;
 588 }
 589 /******************************************************************************
 590  * IDefClF_fnCreateInstance
 591  */
 592 static HRESULT WINAPI IDefClF_fnCreateInstance(
 593   LPCLASSFACTORY iface, LPUNKNOWN pUnkOuter, REFIID riid, LPVOID *ppvObject)
 594 {
 595         IDefClFImpl *This = (IDefClFImpl *)iface;
 596
 597         TRACE("%p->(%p,%s,%p)\n",This,pUnkOuter,shdebugstr_guid(riid),ppvObject);
 598
 599         *ppvObject = NULL;
 600
 601         if ( This->riidInst==NULL ||
 602              IsEqualCLSID(riid, This->riidInst) ||
 603              IsEqualCLSID(riid, &IID_IUnknown) )
 604         {
 605           return This->lpfnCI(pUnkOuter, riid, ppvObject);
 606         }
 607
 608         ERR("unknown IID requested %s\n",shdebugstr_guid(riid));
 609         return E_NOINTERFACE;
 610 }
 611 /******************************************************************************
 612  * IDefClF_fnLockServer
 613  */
 614 static HRESULT WINAPI IDefClF_fnLockServer(LPCLASSFACTORY iface, BOOL fLock)
 615 {
 616         IDefClFImpl *This = (IDefClFImpl *)iface;
 617         TRACE("%p->(0x%x), not implemented\n",This, fLock);
 618         return E_NOTIMPL;
 619 }
 620
 621 static const IClassFactoryVtbl dclfvt =
 622 {
 623     IDefClF_fnQueryInterface,
 624     IDefClF_fnAddRef,
 625   IDefClF_fnRelease,
 626   IDefClF_fnCreateInstance,
 627   IDefClF_fnLockServer
 628 };
 629
 630 /******************************************************************************
 631  * SHCreateDefClassObject                       [SHELL32.70]
 632  */
 633 HRESULT WINAPI SHCreateDefClassObject(
 634         REFIID  riid,
 635         LPVOID* ppv,
 636         LPFNCREATEINSTANCE lpfnCI,      /* [in] create instance callback entry */
 637         LPDWORD pcRefDll,               /* [in/out] ref count of the dll */
 638         REFIID  riidInst)               /* [in] optional interface to the instance */
 639 {
 640         IClassFactory * pcf;
 641
 642         TRACE("%s %p %p %p %s\n",
 643               shdebugstr_guid(riid), ppv, lpfnCI, pcRefDll, shdebugstr_guid(riidInst));
 644
 645         if (! IsEqualCLSID(riid, &IID_IClassFactory) ) return E_NOINTERFACE;
 646         if (! (pcf = IDefClF_fnConstructor(lpfnCI, (PLONG)pcRefDll, riidInst))) return E_OUTOFMEMORY;
 647         *ppv = pcf;
 648         return NOERROR;
 649 }
 650
 651 /*************************************************************************
 652  *  DragAcceptFiles             [SHELL32.@]
 653  */
 654 void WINAPI DragAcceptFiles(HWND hWnd, BOOL b)
 655 {
 656         LONG exstyle;
 657
 658         if( !IsWindow(hWnd) ) return;
 659         exstyle = GetWindowLongA(hWnd,GWL_EXSTYLE);
 660         if (b)
 661           exstyle |= WS_EX_ACCEPTFILES;
 662         else
 663           exstyle &= ~WS_EX_ACCEPTFILES;
 664         SetWindowLongA(hWnd,GWL_EXSTYLE,exstyle);
 665 }
 666
 667 /*************************************************************************
 668  * DragFinish           [SHELL32.@]
 669  */
 670 void WINAPI DragFinish(HDROP h)
 671 {
 672         TRACE("\n");
 673         GlobalFree((HGLOBAL)h);
 674 }
 675
 676 /*************************************************************************
 677  * DragQueryPoint               [SHELL32.@]
 678  */
 679 BOOL WINAPI DragQueryPoint(HDROP hDrop, POINT *p)
 680 {
 681         DROPFILES *lpDropFileStruct;
 682         BOOL bRet;
 683
 684         TRACE("\n");
 685
 686         lpDropFileStruct = (DROPFILES *) GlobalLock(hDrop);
 687
 688         *p = lpDropFileStruct->pt;
 689         bRet = lpDropFileStruct->fNC;
 690
 691         GlobalUnlock(hDrop);
 692         return bRet;
 693 }
 694
 695 /*************************************************************************
 696  *  DragQueryFile               [SHELL32.@]
 697  *  DragQueryFileA              [SHELL32.@]
 698  */
 699 UINT WINAPI DragQueryFileA(
 700         HDROP hDrop,
 701         UINT lFile,
 702         LPSTR lpszFile,
 703         UINT lLength)
 704 {
 705         LPSTR lpDrop;
 706         UINT i = 0;
 707         DROPFILES *lpDropFileStruct = (DROPFILES *) GlobalLock(hDrop);
 708
 709         TRACE("(%p, %x, %p, %u)\n",     hDrop,lFile,lpszFile,lLength);
 710
 711         if(!lpDropFileStruct) goto end;
 712
 713         lpDrop = (LPSTR) lpDropFileStruct + lpDropFileStruct->pFiles;
 714
 715         if(lpDropFileStruct->fWide) {
 716             LPWSTR lpszFileW = NULL;
 717
 718             if(lpszFile) {
 719                 lpszFileW = HeapAlloc(GetProcessHeap(), 0, lLength*sizeof(WCHAR));
 720                 if(lpszFileW == NULL) {
 721                     goto end;
 722                 }
 723             }
 724             i = DragQueryFileW(hDrop, lFile, lpszFileW, lLength);
 725
 726             if(lpszFileW) {
 727                 WideCharToMultiByte(CP_ACP, 0, lpszFileW, -1, lpszFile, lLength, 0, NULL);
 728                 HeapFree(GetProcessHeap(), 0, lpszFileW);
 729             }
 730             goto end;
 731         }
 732
 733         while (i++ < lFile)
 734         {
 735           while (*lpDrop++); /* skip filename */
 736           if (!*lpDrop)
 737           {
 738             i = (lFile == 0xFFFFFFFF) ? i : 0;
 739             goto end;
 740           }
 741         }
 742
 743         i = strlen(lpDrop);
 744         i++;
 745         if (!lpszFile ) goto end;   /* needed buffer size */
 746         i = (lLength > i) ? i : lLength;
 747         lstrcpynA (lpszFile,  lpDrop,  i);
 748 end:
 749         GlobalUnlock(hDrop);
 750         return i;
 751 }
 752
 753 /*************************************************************************
 754  *  DragQueryFileW              [SHELL32.@]
 755  */
 756 UINT WINAPI DragQueryFileW(
 757         HDROP hDrop,
 758         UINT lFile,
 759         LPWSTR lpszwFile,
 760         UINT lLength)
 761 {
 762         LPWSTR lpwDrop;
 763         UINT i = 0;
 764         DROPFILES *lpDropFileStruct = (DROPFILES *) GlobalLock(hDrop);
 765
 766         TRACE("(%p, %x, %p, %u)\n", hDrop,lFile,lpszwFile,lLength);
 767
 768         if(!lpDropFileStruct) goto end;
 769
 770         lpwDrop = (LPWSTR) ((LPSTR)lpDropFileStruct + lpDropFileStruct->pFiles);
 771
 772         if(lpDropFileStruct->fWide == FALSE) {
 773             LPSTR lpszFileA = NULL;
 774
 775             if(lpszwFile) {
 776                 lpszFileA = HeapAlloc(GetProcessHeap(), 0, lLength);
 777                 if(lpszFileA == NULL) {
 778                     goto end;
 779                 }
 780             }
 781             i = DragQueryFileA(hDrop, lFile, lpszFileA, lLength);
 782
 783             if(lpszFileA) {
 784                 MultiByteToWideChar(CP_ACP, 0, lpszFileA, -1, lpszwFile, lLength);
 785                 HeapFree(GetProcessHeap(), 0, lpszFileA);
 786             }
 787             goto end;
 788         }
 789
 790         i = 0;
 791         while (i++ < lFile)
 792         {
 793           while (*lpwDrop++); /* skip filename */
 794           if (!*lpwDrop)
 795           {
 796             i = (lFile == 0xFFFFFFFF) ? i : 0;
 797             goto end;
 798           }
 799         }
 800
 801         i = strlenW(lpwDrop);
 802         i++;
 803         if ( !lpszwFile) goto end;   /* needed buffer size */
 804
 805         i = (lLength > i) ? i : lLength;
 806         lstrcpynW (lpszwFile, lpwDrop, i);
 807 end:
 808         GlobalUnlock(hDrop);
 809         return i;
 810 }