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