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 <stdlib.h>
  25 #include <string.h>
  26
  27 #include "shellapi.h"
  28 #include "shlobj.h"
  29 #include "shlguid.h"
  30 #include "winreg.h"
  31 #include "winerror.h"
  32
  33 #include "undocshell.h"
  34 #include "wine/unicode.h"
  35 #include "shell32_main.h"
  36
  37 #include "wine/debug.h"
  38 #include "shlwapi.h"
  39 #include "winuser.h"
  40 #include "debughlp.h"
  41 #include "wine/obj_dragdrophelper.h"
  42
  43 WINE_DEFAULT_DEBUG_CHANNEL(shell);
  44
  45 extern HRESULT WINAPI IFSFolder_Constructor(IUnknown * pUnkOuter, REFIID riid, LPVOID * ppv);
  46
  47 const WCHAR sShell32[12] = {'S','H','E','L','L','3','2','.','D','L','L','\0'};
  48 const WCHAR sOLE32[10] = {'O','L','E','3','2','.','D','L','L','\0'};
  49
  50 HINSTANCE hShellOle32 = 0;
  51 /**************************************************************************
  52  * Default ClassFactory types
  53  */
  54 typedef HRESULT (CALLBACK *LPFNCREATEINSTANCE)(IUnknown* pUnkOuter, REFIID riid, LPVOID* ppvObject);
  55 IClassFactory * IDefClF_fnConstructor(LPFNCREATEINSTANCE lpfnCI, PLONG pcRefDll, REFIID riidInst);
  56
  57 /* this table contains all CLSID's of shell32 objects */
  58 struct {
  59         REFIID                  riid;
  60         LPFNCREATEINSTANCE      lpfnCI;
  61 } InterfaceTable[6] = {
  62         {&CLSID_ShellFSFolder,  &IFSFolder_Constructor},
  63         {&CLSID_MyComputer,     &ISF_MyComputer_Constructor},
  64         {&CLSID_ShellDesktop,   &ISF_Desktop_Constructor},
  65         {&CLSID_ShellLink,      &IShellLink_Constructor},
  66         {&CLSID_DragDropHelper, &IDropTargetHelper_Constructor},
  67         {NULL,NULL}
  68 };
  69
  70 /*************************************************************************
  71  * __CoCreateInstance [internal]
  72  *
  73  * NOTES
  74  *   wraper for late bound call to OLE32.DLL
  75  *
  76  */
  77 HRESULT (WINAPI *pCoCreateInstance)(REFCLSID rclsid, LPUNKNOWN pUnkOuter, DWORD dwClsContext, REFIID iid, LPVOID *ppv) = NULL;
  78
  79 void * __GetExternalFunc(HMODULE * phModule, LPCWSTR szModuleName, LPCSTR szProcName)
  80 {
  81         if (!*phModule) *phModule = GetModuleHandleW(szModuleName);
  82         if (!*phModule) *phModule = LoadLibraryW(szModuleName);
  83         if (*phModule) return GetProcAddress(*phModule, szProcName);
  84         return NULL;
  85 }
  86
  87 HRESULT  __CoCreateInstance(REFCLSID rclsid, LPUNKNOWN pUnkOuter, DWORD dwClsContext, REFIID iid, LPVOID *ppv)
  88 {
  89         if(!pCoCreateInstance) pCoCreateInstance = __GetExternalFunc(&hShellOle32, sOLE32, "CoCreateInstance");
  90         if(!pCoCreateInstance) return E_FAIL;
  91         return pCoCreateInstance(rclsid, pUnkOuter, dwClsContext, iid, ppv);
  92 }
  93
  94 /*************************************************************************
  95  * SHCoCreateInstance [SHELL32.102]
  96  *
  97  * NOTES
  98  *     exported by ordinal
  99  */
 100
 101 /* FIXME: this should be SHLWAPI.24 since we can't yet import by ordinal */
 102
 103 DWORD WINAPI __SHGUIDToStringW (REFGUID guid, LPWSTR str)
 104 {
 105     WCHAR sFormat[52] = {'{','%','0','8','l','x','-','%','0','4',
 106                          'x','-','%','0','4','x','-','%','0','2',
 107                          'x','%','0','2','x','-','%','0','2','x',
 108                          '%','0','2','x','%','0','2','x','%','0',
 109                          '2','x','%','0','2','x','%','0','2','x',
 110                          '}','\0'};
 111
 112     return wsprintfW ( str, sFormat,
 113              guid->Data1, guid->Data2, guid->Data3,
 114              guid->Data4[0], guid->Data4[1], guid->Data4[2], guid->Data4[3],
 115              guid->Data4[4], guid->Data4[5], guid->Data4[6], guid->Data4[7] );
 116
 117 }
 118
 119 /************************************************************************/
 120
 121 LRESULT WINAPI SHCoCreateInstance(
 122         LPCSTR aclsid,
 123         REFCLSID clsid,
 124         LPUNKNOWN pUnkOuter,
 125         REFIID refiid,
 126         LPVOID *ppv)
 127 {
 128         DWORD   hres;
 129         IID     iid;
 130         CLSID * myclsid = (CLSID*)clsid;
 131         WCHAR   sKeyName[MAX_PATH];
 132         const   WCHAR sCLSID[7] = {'C','L','S','I','D','\\','\0'};
 133         WCHAR   sClassID[60];
 134         const WCHAR sInProcServer32[16] ={'\\','I','n','p','r','o','c','S','e','r','v','e','r','3','2','\0'};
 135         const WCHAR sLoadWithoutCOM[15] ={'L','o','a','d','W','i','t','h','o','u','t','C','O','M','\0'};
 136         WCHAR   sDllPath[MAX_PATH];
 137         HKEY    hKey;
 138         DWORD   dwSize;
 139         BOOLEAN bLoadFromShell32 = FALSE;
 140         BOOLEAN bLoadWithoutCOM = FALSE;
 141         IClassFactory * pcf = NULL;
 142
 143         if(!ppv) return E_POINTER;
 144         *ppv=NULL;
 145
 146         /* if the clsid is a string, convert it */
 147         if (!clsid)
 148         {
 149           if (!aclsid) return REGDB_E_CLASSNOTREG;
 150           SHCLSIDFromStringA(aclsid, &iid);
 151           myclsid = &iid;
 152         }
 153
 154         TRACE("(%p,%s,unk:%p,%s,%p)\n",
 155                 aclsid,shdebugstr_guid(myclsid),pUnkOuter,shdebugstr_guid(refiid),ppv);
 156
 157         /* we look up the dll path in the registry */
 158         __SHGUIDToStringW(myclsid, sClassID);
 159         lstrcpyW(sKeyName, sCLSID);
 160         lstrcatW(sKeyName, sClassID);
 161         lstrcatW(sKeyName, sInProcServer32);
 162
 163         if (ERROR_SUCCESS == RegOpenKeyExW(HKEY_CLASSES_ROOT, sKeyName, 0, KEY_READ, &hKey)) {
 164             dwSize = sizeof(sDllPath);
 165             SHQueryValueExW(hKey, NULL, 0,0, sDllPath, &dwSize );
 166
 167             /* if a special registry key is set, we load a shell extension without help of OLE32 */
 168             bLoadWithoutCOM = (ERROR_SUCCESS == SHQueryValueExW(hKey, sLoadWithoutCOM, 0, 0, 0, 0));
 169
 170             /* if the com object is inside shell32, omit use of ole32 */
 171             bLoadFromShell32 = (0==lstrcmpiW( PathFindFileNameW(sDllPath), sShell32));
 172
 173             RegCloseKey (hKey);
 174         } else {
 175             /* since we can't find it in the registry we try internally */
 176             bLoadFromShell32 = TRUE;
 177         }
 178
 179         TRACE("WithoutCom=%u FromShell=%u\n", bLoadWithoutCOM, bLoadFromShell32);
 180
 181         /* now we create a instance */
 182         if (bLoadFromShell32) {
 183             if (! SUCCEEDED(SHELL32_DllGetClassObject(myclsid, &IID_IClassFactory,(LPVOID*)&pcf))) {
 184                 ERR("LoadFromShell failed for CLSID=%s\n", shdebugstr_guid(myclsid));
 185             }
 186         } else if (bLoadWithoutCOM) {
 187
 188             /* load a external dll without ole32 */
 189             HANDLE hLibrary;
 190             typedef HRESULT (CALLBACK *DllGetClassObjectFunc)(REFCLSID clsid, REFIID iid, LPVOID *ppv);
 191             DllGetClassObjectFunc DllGetClassObject;
 192
 193             if ((hLibrary = LoadLibraryExW(sDllPath, 0, LOAD_WITH_ALTERED_SEARCH_PATH)) == 0) {
 194                 ERR("couldn't load InprocServer32 dll %s\n", debugstr_w(sDllPath));
 195                 hres = E_ACCESSDENIED;
 196                 goto end;
 197             } else if (!(DllGetClassObject = (DllGetClassObjectFunc)GetProcAddress(hLibrary, "DllGetClassObject"))) {
 198                 ERR("couldn't find function DllGetClassObject in %s\n", debugstr_w(sDllPath));
 199                 FreeLibrary( hLibrary );
 200                 hres = E_ACCESSDENIED;
 201                 goto end;
 202             } else if (! SUCCEEDED(hres = DllGetClassObject(myclsid, &IID_IClassFactory, (LPVOID*)&pcf))) {
 203                     TRACE("GetClassObject failed 0x%08lx\n", hres);
 204                     goto end;
 205             }
 206
 207         } else {
 208
 209             /* load a external dll in the usual way */
 210             hres = __CoCreateInstance(myclsid, pUnkOuter, CLSCTX_INPROC_SERVER, refiid, ppv);
 211             goto end;
 212         }
 213
 214         /* here we should have a ClassFactory */
 215         if (!pcf) return E_ACCESSDENIED;
 216
 217         hres = IClassFactory_CreateInstance(pcf, pUnkOuter, refiid, ppv);
 218         IClassFactory_Release(pcf);
 219 end:
 220         if(hres!=S_OK)
 221         {
 222           ERR("failed (0x%08lx) to create CLSID:%s IID:%s\n",
 223               hres, shdebugstr_guid(myclsid), shdebugstr_guid(refiid));
 224           ERR("class not found in registry\n");
 225         }
 226
 227         TRACE("-- instance: %p\n",*ppv);
 228         return hres;
 229 }
 230
 231 /*************************************************************************
 232  * DllGetClassObject   [SHELL32.128]
 233  */
 234 HRESULT WINAPI SHELL32_DllGetClassObject(REFCLSID rclsid, REFIID iid, LPVOID *ppv)
 235 {
 236         HRESULT hres = E_OUTOFMEMORY;
 237         IClassFactory * pcf = NULL;
 238         int i;
 239
 240         TRACE("CLSID:%s,IID:%s\n",shdebugstr_guid(rclsid),shdebugstr_guid(iid));
 241
 242         if (!ppv) return E_INVALIDARG;
 243         *ppv = NULL;
 244
 245         /* search our internal interface table */
 246         for(i=0;InterfaceTable[i].riid;i++) {
 247             if(IsEqualIID(InterfaceTable[i].riid, rclsid)) {
 248                 TRACE("index[%u]\n", i);
 249                 pcf = IDefClF_fnConstructor(InterfaceTable[i].lpfnCI, NULL, NULL);
 250             }
 251         }
 252
 253         if (!pcf) {
 254             FIXME("failed for CLSID=%s\n", shdebugstr_guid(rclsid));
 255             return CLASS_E_CLASSNOTAVAILABLE;
 256         }
 257
 258         hres = IClassFactory_QueryInterface(pcf, iid, ppv);
 259         IClassFactory_Release(pcf);
 260
 261         TRACE("-- pointer to class factory: %p\n",*ppv);
 262         return hres;
 263 }
 264
 265 /*************************************************************************
 266  * SHCLSIDFromString                            [SHELL32.147]
 267  *
 268  * NOTES
 269  *     exported by ordinal
 270  */
 271 DWORD WINAPI SHCLSIDFromStringA (LPCSTR clsid, CLSID *id)
 272 {
 273     WCHAR buffer[40];
 274     TRACE("(%p(%s) %p)\n", clsid, clsid, id);
 275     if (!MultiByteToWideChar( CP_ACP, 0, clsid, -1, buffer, sizeof(buffer)/sizeof(WCHAR) ))
 276         return CO_E_CLASSSTRING;
 277     return CLSIDFromString( buffer, id );
 278 }
 279 DWORD WINAPI SHCLSIDFromStringW (LPWSTR clsid, CLSID *id)
 280 {
 281         TRACE("(%p(%s) %p)\n", clsid, debugstr_w(clsid), id);
 282         return CLSIDFromString(clsid, id);
 283 }
 284 DWORD WINAPI SHCLSIDFromStringAW (LPVOID clsid, CLSID *id)
 285 {
 286         if (SHELL_OsIsUnicode())
 287           return SHCLSIDFromStringW (clsid, id);
 288         return SHCLSIDFromStringA (clsid, id);
 289 }
 290
 291 /*************************************************************************
 292  *      Shell Memory Allocator
 293  */
 294
 295 /* set the vtable later */
 296 extern ICOM_VTABLE(IMalloc) VT_Shell_IMalloc32;
 297
 298 /* this is the static object instance */
 299 typedef struct {
 300         ICOM_VFIELD(IMalloc);
 301         DWORD dummy;
 302 } _ShellMalloc;
 303
 304 _ShellMalloc Shell_Malloc = { &VT_Shell_IMalloc32,1};
 305
 306 /* this is the global allocator of shell32 */
 307 IMalloc * ShellTaskAllocator = NULL;
 308
 309 /******************************************************************************
 310  *              IShellMalloc_QueryInterface        [VTABLE]
 311  */
 312 static HRESULT WINAPI IShellMalloc_fnQueryInterface(LPMALLOC iface, REFIID refiid, LPVOID *obj)
 313 {
 314         TRACE("(%s,%p)\n",shdebugstr_guid(refiid),obj);
 315         if (IsEqualIID(refiid, &IID_IUnknown) || IsEqualIID(refiid, &IID_IMalloc)) {
 316                 *obj = (LPMALLOC) &Shell_Malloc;
 317                 return S_OK;
 318         }
 319         return E_NOINTERFACE;
 320 }
 321
 322 /******************************************************************************
 323  *              IShellMalloc_AddRefRelease        [VTABLE]
 324  */
 325 static ULONG WINAPI IShellMalloc_fnAddRefRelease(LPMALLOC iface)
 326 {
 327         return 1;
 328 }
 329
 330 /******************************************************************************
 331  *              IShellMalloc_Alloc [VTABLE]
 332  */
 333 static LPVOID WINAPI IShellMalloc_fnAlloc(LPMALLOC iface, DWORD cb)
 334 {
 335         LPVOID addr;
 336
 337         addr = (LPVOID) LocalAlloc(GMEM_ZEROINIT, cb);
 338         TRACE("(%p,%ld);\n",addr,cb);
 339         return addr;
 340 }
 341
 342 /******************************************************************************
 343  *              IShellMalloc_Realloc [VTABLE]
 344  */
 345 static LPVOID WINAPI IShellMalloc_fnRealloc(LPMALLOC iface, LPVOID pv, DWORD cb)
 346 {
 347         LPVOID addr;
 348
 349         if (pv) {
 350                 if (cb) {
 351                         addr = (LPVOID) LocalReAlloc((HANDLE) pv, cb, GMEM_ZEROINIT | GMEM_MOVEABLE);
 352                 } else {
 353                         LocalFree((HANDLE) pv);
 354                         addr = NULL;
 355                 }
 356         } else {
 357                 if (cb) {
 358                         addr = (LPVOID) LocalAlloc(GMEM_ZEROINIT, cb);
 359                 } else {
 360                         addr = NULL;
 361                 }
 362         }
 363
 364         TRACE("(%p->%p,%ld)\n",pv,addr,cb);
 365         return addr;
 366 }
 367
 368 /******************************************************************************
 369  *              IShellMalloc_Free [VTABLE]
 370  */
 371 static VOID WINAPI IShellMalloc_fnFree(LPMALLOC iface, LPVOID pv)
 372 {
 373         TRACE("(%p)\n",pv);
 374         LocalFree((HANDLE) pv);
 375 }
 376
 377 /******************************************************************************
 378  *              IShellMalloc_GetSize [VTABLE]
 379  */
 380 static DWORD WINAPI IShellMalloc_fnGetSize(LPMALLOC iface, LPVOID pv)
 381 {
 382         DWORD cb = (DWORD) LocalSize((HANDLE)pv);
 383         TRACE("(%p,%ld)\n", pv, cb);
 384         return cb;
 385 }
 386
 387 /******************************************************************************
 388  *              IShellMalloc_DidAlloc [VTABLE]
 389  */
 390 static INT WINAPI IShellMalloc_fnDidAlloc(LPMALLOC iface, LPVOID pv)
 391 {
 392         TRACE("(%p)\n",pv);
 393         return -1;
 394 }
 395
 396 /******************************************************************************
 397  *              IShellMalloc_HeapMinimize [VTABLE]
 398  */
 399 static VOID WINAPI IShellMalloc_fnHeapMinimize(LPMALLOC iface)
 400 {
 401         TRACE("()\n");
 402 }
 403
 404 static ICOM_VTABLE(IMalloc) VT_Shell_IMalloc32 =
 405 {
 406         ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
 407         IShellMalloc_fnQueryInterface,
 408         IShellMalloc_fnAddRefRelease,
 409         IShellMalloc_fnAddRefRelease,
 410         IShellMalloc_fnAlloc,
 411         IShellMalloc_fnRealloc,
 412         IShellMalloc_fnFree,
 413         IShellMalloc_fnGetSize,
 414         IShellMalloc_fnDidAlloc,
 415         IShellMalloc_fnHeapMinimize
 416 };
 417
 418 /*************************************************************************
 419  *                       SHGetMalloc                    [SHELL32.@]
 420  *
 421  * Return the shell IMalloc interface.
 422  *
 423  * PARAMS
 424  *  lpmal [O] Destination for IMalloc interface.
 425  *
 426  * RETURNS
 427  *  Success: S_OK. lpmal contains the shells IMalloc interface.
 428  *  Failure. An HRESULT error code.
 429  *
 430  * NOTES
 431  *  This function will use CoGetMalloc() if OLE32.DLL is already loaded.
 432  *  If not it uses an internal implementation as a fallback.
 433  */
 434 HRESULT WINAPI SHGetMalloc(LPMALLOC *lpmal)
 435 {
 436         HRESULT (WINAPI *pCoGetMalloc)(DWORD,LPMALLOC *);
 437         HMODULE hOle32;
 438
 439         TRACE("(%p)\n", lpmal);
 440
 441         if (!ShellTaskAllocator)
 442         {
 443                 hOle32 = GetModuleHandleA("OLE32.DLL");
 444                 if(hOle32) {
 445                         pCoGetMalloc = (void*) GetProcAddress(hOle32, "CoGetMalloc");
 446                         if (pCoGetMalloc) pCoGetMalloc(MEMCTX_TASK, &ShellTaskAllocator);
 447                         TRACE("got ole32 IMalloc\n");
 448                 }
 449                 if(!ShellTaskAllocator) {
 450                         ShellTaskAllocator = (IMalloc* ) &Shell_Malloc;
 451                         TRACE("use fallback allocator\n");
 452                 }
 453         }
 454         *lpmal = ShellTaskAllocator;
 455         return  S_OK;
 456 }
 457
 458 /*************************************************************************
 459  * SHAlloc                                      [SHELL32.196]
 460  *
 461  * NOTES
 462  *     exported by ordinal
 463  */
 464 LPVOID WINAPI SHAlloc(DWORD len)
 465 {
 466         IMalloc * ppv;
 467         LPBYTE ret;
 468
 469         if (!ShellTaskAllocator) SHGetMalloc(&ppv);
 470
 471         ret = (LPVOID) IMalloc_Alloc(ShellTaskAllocator, len);
 472         TRACE("%lu bytes at %p\n",len, ret);
 473         return (LPVOID)ret;
 474 }
 475
 476 /*************************************************************************
 477  * SHFree                                       [SHELL32.195]
 478  *
 479  * NOTES
 480  *     exported by ordinal
 481  */
 482 void WINAPI SHFree(LPVOID pv)
 483 {
 484         IMalloc * ppv;
 485
 486         TRACE("%p\n",pv);
 487         if (!ShellTaskAllocator) SHGetMalloc(&ppv);
 488         IMalloc_Free(ShellTaskAllocator, pv);
 489 }
 490
 491 /*************************************************************************
 492  * SHGetDesktopFolder                   [SHELL32.@]
 493  */
 494 DWORD WINAPI SHGetDesktopFolder(IShellFolder **psf)
 495 {
 496         HRESULT hres = S_OK;
 497         TRACE("\n");
 498
 499         if(!psf) return E_INVALIDARG;
 500         *psf = NULL;
 501         hres = ISF_Desktop_Constructor(NULL, &IID_IShellFolder,(LPVOID*)psf);
 502
 503         TRACE("-- %p->(%p)\n",psf, *psf);
 504         return hres;
 505 }
 506 /**************************************************************************
 507  * Default ClassFactory Implementation
 508  *
 509  * SHCreateDefClassObject
 510  *
 511  * NOTES
 512  *  helper function for dll's without a own classfactory
 513  *  a generic classfactory is returned
 514  *  when the CreateInstance of the cf is called the callback is executed
 515  */
 516
 517 typedef struct
 518 {
 519     ICOM_VFIELD(IClassFactory);
 520     DWORD                       ref;
 521     CLSID                       *rclsid;
 522     LPFNCREATEINSTANCE          lpfnCI;
 523     const IID *                 riidInst;
 524     ULONG *                     pcRefDll; /* pointer to refcounter in external dll (ugrrr...) */
 525 } IDefClFImpl;
 526
 527 static ICOM_VTABLE(IClassFactory) dclfvt;
 528
 529 /**************************************************************************
 530  *  IDefClF_fnConstructor
 531  */
 532
 533 IClassFactory * IDefClF_fnConstructor(LPFNCREATEINSTANCE lpfnCI, PLONG pcRefDll, REFIID riidInst)
 534 {
 535         IDefClFImpl* lpclf;
 536
 537         lpclf = (IDefClFImpl*)HeapAlloc(GetProcessHeap(),0,sizeof(IDefClFImpl));
 538         lpclf->ref = 1;
 539         ICOM_VTBL(lpclf) = &dclfvt;
 540         lpclf->lpfnCI = lpfnCI;
 541         lpclf->pcRefDll = pcRefDll;
 542
 543         if (pcRefDll) InterlockedIncrement(pcRefDll);
 544         lpclf->riidInst = riidInst;
 545
 546         TRACE("(%p)%s\n",lpclf, shdebugstr_guid(riidInst));
 547         return (LPCLASSFACTORY)lpclf;
 548 }
 549 /**************************************************************************
 550  *  IDefClF_fnQueryInterface
 551  */
 552 static HRESULT WINAPI IDefClF_fnQueryInterface(
 553   LPCLASSFACTORY iface, REFIID riid, LPVOID *ppvObj)
 554 {
 555         ICOM_THIS(IDefClFImpl,iface);
 556
 557         TRACE("(%p)->(%s)\n",This,shdebugstr_guid(riid));
 558
 559         *ppvObj = NULL;
 560
 561         if(IsEqualIID(riid, &IID_IUnknown) || IsEqualIID(riid, &IID_IClassFactory)) {
 562           *ppvObj = This;
 563           InterlockedIncrement(&This->ref);
 564           return S_OK;
 565         }
 566
 567         TRACE("-- E_NOINTERFACE\n");
 568         return E_NOINTERFACE;
 569 }
 570 /******************************************************************************
 571  * IDefClF_fnAddRef
 572  */
 573 static ULONG WINAPI IDefClF_fnAddRef(LPCLASSFACTORY iface)
 574 {
 575         ICOM_THIS(IDefClFImpl,iface);
 576         TRACE("(%p)->(count=%lu)\n",This,This->ref);
 577
 578         return InterlockedIncrement(&This->ref);
 579 }
 580 /******************************************************************************
 581  * IDefClF_fnRelease
 582  */
 583 static ULONG WINAPI IDefClF_fnRelease(LPCLASSFACTORY iface)
 584 {
 585         ICOM_THIS(IDefClFImpl,iface);
 586         TRACE("(%p)->(count=%lu)\n",This,This->ref);
 587
 588         if (!InterlockedDecrement(&This->ref))
 589         {
 590           if (This->pcRefDll) InterlockedDecrement(This->pcRefDll);
 591
 592           TRACE("-- destroying IClassFactory(%p)\n",This);
 593           HeapFree(GetProcessHeap(),0,This);
 594           return 0;
 595         }
 596         return This->ref;
 597 }
 598 /******************************************************************************
 599  * IDefClF_fnCreateInstance
 600  */
 601 static HRESULT WINAPI IDefClF_fnCreateInstance(
 602   LPCLASSFACTORY iface, LPUNKNOWN pUnkOuter, REFIID riid, LPVOID *ppvObject)
 603 {
 604         ICOM_THIS(IDefClFImpl,iface);
 605
 606         TRACE("%p->(%p,%s,%p)\n",This,pUnkOuter,shdebugstr_guid(riid),ppvObject);
 607
 608         *ppvObject = NULL;
 609
 610         if ( This->riidInst==NULL ||
 611              IsEqualCLSID(riid, This->riidInst) ||
 612              IsEqualCLSID(riid, &IID_IUnknown) )
 613         {
 614           return This->lpfnCI(pUnkOuter, riid, ppvObject);
 615         }
 616
 617         ERR("unknown IID requested %s\n",shdebugstr_guid(riid));
 618         return E_NOINTERFACE;
 619 }
 620 /******************************************************************************
 621  * IDefClF_fnLockServer
 622  */
 623 static HRESULT WINAPI IDefClF_fnLockServer(LPCLASSFACTORY iface, BOOL fLock)
 624 {
 625         ICOM_THIS(IDefClFImpl,iface);
 626         TRACE("%p->(0x%x), not implemented\n",This, fLock);
 627         return E_NOTIMPL;
 628 }
 629
 630 static ICOM_VTABLE(IClassFactory) dclfvt =
 631 {
 632     ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
 633     IDefClF_fnQueryInterface,
 634     IDefClF_fnAddRef,
 635   IDefClF_fnRelease,
 636   IDefClF_fnCreateInstance,
 637   IDefClF_fnLockServer
 638 };
 639
 640 /******************************************************************************
 641  * SHCreateDefClassObject                       [SHELL32.70]
 642  */
 643 HRESULT WINAPI SHCreateDefClassObject(
 644         REFIID  riid,
 645         LPVOID* ppv,
 646         LPFNCREATEINSTANCE lpfnCI,      /* [in] create instance callback entry */
 647         LPDWORD pcRefDll,               /* [in/out] ref count of the dll */
 648         REFIID  riidInst)               /* [in] optional interface to the instance */
 649 {
 650         IClassFactory * pcf;
 651
 652         TRACE("%s %p %p %p %s\n",
 653               shdebugstr_guid(riid), ppv, lpfnCI, pcRefDll, shdebugstr_guid(riidInst));
 654
 655         if (! IsEqualCLSID(riid, &IID_IClassFactory) ) return E_NOINTERFACE;
 656         if (! (pcf = IDefClF_fnConstructor(lpfnCI, pcRefDll, riidInst))) return E_OUTOFMEMORY;
 657         *ppv = pcf;
 658         return NOERROR;
 659 }
 660
 661 /*************************************************************************
 662  *  DragAcceptFiles             [SHELL32.54]
 663  */
 664 void WINAPI DragAcceptFiles(HWND hWnd, BOOL b)
 665 {
 666         LONG exstyle;
 667
 668         if( !IsWindow(hWnd) ) return;
 669         exstyle = GetWindowLongA(hWnd,GWL_EXSTYLE);
 670         if (b)
 671           exstyle |= WS_EX_ACCEPTFILES;
 672         else
 673           exstyle &= ~WS_EX_ACCEPTFILES;
 674         SetWindowLongA(hWnd,GWL_EXSTYLE,exstyle);
 675 }
 676
 677 /*************************************************************************
 678  * DragFinish           [SHELL32.80]
 679  */
 680 void WINAPI DragFinish(HDROP h)
 681 {
 682         TRACE("\n");
 683         GlobalFree((HGLOBAL)h);
 684 }
 685
 686 /*************************************************************************
 687  * DragQueryPoint               [SHELL32.135]
 688  */
 689 BOOL WINAPI DragQueryPoint(HDROP hDrop, POINT *p)
 690 {
 691         DROPFILES *lpDropFileStruct;
 692         BOOL bRet;
 693
 694         TRACE("\n");
 695
 696         lpDropFileStruct = (DROPFILES *) GlobalLock(hDrop);
 697
 698         *p = lpDropFileStruct->pt;
 699         bRet = lpDropFileStruct->fNC;
 700
 701         GlobalUnlock(hDrop);
 702         return bRet;
 703 }
 704
 705 /*************************************************************************
 706  *  DragQueryFile               [SHELL32.81]
 707  *  DragQueryFileA              [SHELL32.82]
 708  */
 709 UINT WINAPI DragQueryFileA(
 710         HDROP hDrop,
 711         UINT lFile,
 712         LPSTR lpszFile,
 713         UINT lLength)
 714 {
 715         LPSTR lpDrop;
 716         UINT i = 0;
 717         DROPFILES *lpDropFileStruct = (DROPFILES *) GlobalLock(hDrop);
 718
 719         TRACE("(%p, %x, %p, %u)\n",     hDrop,lFile,lpszFile,lLength);
 720
 721         if(!lpDropFileStruct) goto end;
 722
 723         lpDrop = (LPSTR) lpDropFileStruct + lpDropFileStruct->pFiles;
 724
 725         if(lpDropFileStruct->fWide == TRUE) {
 726             LPWSTR lpszFileW = NULL;
 727
 728             if(lpszFile) {
 729                 lpszFileW = (LPWSTR) HeapAlloc(GetProcessHeap(), 0, lLength*sizeof(WCHAR));
 730                 if(lpszFileW == NULL) {
 731                     goto end;
 732                 }
 733             }
 734             i = DragQueryFileW(hDrop, lFile, lpszFileW, lLength);
 735
 736             if(lpszFileW) {
 737                 WideCharToMultiByte(CP_ACP, 0, lpszFileW, -1, lpszFile, lLength, 0, NULL);
 738                 HeapFree(GetProcessHeap(), 0, lpszFileW);
 739             }
 740             goto end;
 741         }
 742
 743         while (i++ < lFile)
 744         {
 745           while (*lpDrop++); /* skip filename */
 746           if (!*lpDrop)
 747           {
 748             i = (lFile == 0xFFFFFFFF) ? i : 0;
 749             goto end;
 750           }
 751         }
 752
 753         i = strlen(lpDrop);
 754         i++;
 755         if (!lpszFile ) goto end;   /* needed buffer size */
 756         i = (lLength > i) ? i : lLength;
 757         lstrcpynA (lpszFile,  lpDrop,  i);
 758 end:
 759         GlobalUnlock(hDrop);
 760         return i;
 761 }
 762
 763 /*************************************************************************
 764  *  DragQueryFileW              [SHELL32.133]
 765  */
 766 UINT WINAPI DragQueryFileW(
 767         HDROP hDrop,
 768         UINT lFile,
 769         LPWSTR lpszwFile,
 770         UINT lLength)
 771 {
 772         LPWSTR lpwDrop;
 773         UINT i = 0;
 774         DROPFILES *lpDropFileStruct = (DROPFILES *) GlobalLock(hDrop);
 775
 776         TRACE("(%p, %x, %p, %u)\n", hDrop,lFile,lpszwFile,lLength);
 777
 778         if(!lpDropFileStruct) goto end;
 779
 780         lpwDrop = (LPWSTR) ((LPSTR)lpDropFileStruct + lpDropFileStruct->pFiles);
 781
 782         if(lpDropFileStruct->fWide == FALSE) {
 783             LPSTR lpszFileA = NULL;
 784
 785             if(lpszwFile) {
 786                 lpszFileA = (LPSTR) HeapAlloc(GetProcessHeap(), 0, lLength);
 787                 if(lpszFileA == NULL) {
 788                     goto end;
 789                 }
 790             }
 791             i = DragQueryFileA(hDrop, lFile, lpszFileA, lLength);
 792
 793             if(lpszFileA) {
 794                 MultiByteToWideChar(CP_ACP, 0, lpszFileA, -1, lpszwFile, lLength);
 795                 HeapFree(GetProcessHeap(), 0, lpszFileA);
 796             }
 797             goto end;
 798         }
 799
 800         i = 0;
 801         while (i++ < lFile)
 802         {
 803           while (*lpwDrop++); /* skip filename */
 804           if (!*lpwDrop)
 805           {
 806             i = (lFile == 0xFFFFFFFF) ? i : 0;
 807             goto end;
 808           }
 809         }
 810
 811         i = strlenW(lpwDrop);
 812         i++;
 813         if ( !lpszwFile) goto end;   /* needed buffer size */
 814
 815         i = (lLength > i) ? i : lLength;
 816         lstrcpynW (lpszwFile, lpwDrop, i);
 817 end:
 818         GlobalUnlock(hDrop);
 819         return i;
 820 }