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., 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 ICOM_VTABLE(IMalloc) VT_Shell_IMalloc32;
 278
 279 /* this is the static object instance */
 280 typedef struct {
 281         ICOM_VFIELD(IMalloc);
 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 ICOM_VTABLE(IMalloc) VT_Shell_IMalloc32 =
 386 {
 387         ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
 388         IShellMalloc_fnQueryInterface,
 389         IShellMalloc_fnAddRefRelease,
 390         IShellMalloc_fnAddRefRelease,
 391         IShellMalloc_fnAlloc,
 392         IShellMalloc_fnRealloc,
 393         IShellMalloc_fnFree,
 394         IShellMalloc_fnGetSize,
 395         IShellMalloc_fnDidAlloc,
 396         IShellMalloc_fnHeapMinimize
 397 };
 398
 399 /*************************************************************************
 400  *                       SHGetMalloc                    [SHELL32.@]
 401  *
 402  * Return the shell IMalloc interface.
 403  *
 404  * PARAMS
 405  *  lpmal [O] Destination for IMalloc interface.
 406  *
 407  * RETURNS
 408  *  Success: S_OK. lpmal contains the shells IMalloc interface.
 409  *  Failure. An HRESULT error code.
 410  *
 411  * NOTES
 412  *  This function will use CoGetMalloc() if OLE32.DLL is already loaded.
 413  *  If not it uses an internal implementation as a fallback.
 414  */
 415 HRESULT WINAPI SHGetMalloc(LPMALLOC *lpmal)
 416 {
 417         TRACE("(%p)\n", lpmal);
 418
 419         if (!ShellTaskAllocator)
 420         {
 421                 HMODULE hOle32 = GetModuleHandleA("OLE32.DLL");
 422                 /* this is very suspect. we should not being using a different
 423                  * allocator from deallocator based on something undeterministic
 424                  * like whether ole32 is loaded. as it happens currently, they
 425                  * both map to the same allocator deep down, but this could
 426                  * change in the future. */
 427                 if(hOle32) {
 428                         CoGetMalloc(MEMCTX_TASK, &ShellTaskAllocator);
 429                         TRACE("got ole32 IMalloc\n");
 430                 }
 431                 if(!ShellTaskAllocator) {
 432                         ShellTaskAllocator = (IMalloc* ) &Shell_Malloc;
 433                         TRACE("use fallback allocator\n");
 434                 }
 435         }
 436         *lpmal = ShellTaskAllocator;
 437         return  S_OK;
 438 }
 439
 440 /*************************************************************************
 441  * SHAlloc                                      [SHELL32.196]
 442  *
 443  * NOTES
 444  *     exported by ordinal
 445  */
 446 LPVOID WINAPI SHAlloc(DWORD len)
 447 {
 448         IMalloc * ppv;
 449         LPBYTE ret;
 450
 451         if (!ShellTaskAllocator) SHGetMalloc(&ppv);
 452
 453         ret = (LPVOID) IMalloc_Alloc(ShellTaskAllocator, len);
 454         TRACE("%lu bytes at %p\n",len, ret);
 455         return (LPVOID)ret;
 456 }
 457
 458 /*************************************************************************
 459  * SHFree                                       [SHELL32.195]
 460  *
 461  * NOTES
 462  *     exported by ordinal
 463  */
 464 void WINAPI SHFree(LPVOID pv)
 465 {
 466         IMalloc * ppv;
 467
 468         TRACE("%p\n",pv);
 469         if (!ShellTaskAllocator) SHGetMalloc(&ppv);
 470         IMalloc_Free(ShellTaskAllocator, pv);
 471 }
 472
 473 /*************************************************************************
 474  * SHGetDesktopFolder                   [SHELL32.@]
 475  */
 476 HRESULT WINAPI SHGetDesktopFolder(IShellFolder **psf)
 477 {
 478         HRESULT hres = S_OK;
 479         TRACE("\n");
 480
 481         if(!psf) return E_INVALIDARG;
 482         *psf = NULL;
 483         hres = ISF_Desktop_Constructor(NULL, &IID_IShellFolder,(LPVOID*)psf);
 484
 485         TRACE("-- %p->(%p)\n",psf, *psf);
 486         return hres;
 487 }
 488 /**************************************************************************
 489  * Default ClassFactory Implementation
 490  *
 491  * SHCreateDefClassObject
 492  *
 493  * NOTES
 494  *  helper function for dll's without a own classfactory
 495  *  a generic classfactory is returned
 496  *  when the CreateInstance of the cf is called the callback is executed
 497  */
 498
 499 typedef struct
 500 {
 501     ICOM_VFIELD(IClassFactory);
 502     DWORD                       ref;
 503     CLSID                       *rclsid;
 504     LPFNCREATEINSTANCE          lpfnCI;
 505     const IID *                 riidInst;
 506     ULONG *                     pcRefDll; /* pointer to refcounter in external dll (ugrrr...) */
 507 } IDefClFImpl;
 508
 509 static ICOM_VTABLE(IClassFactory) dclfvt;
 510
 511 /**************************************************************************
 512  *  IDefClF_fnConstructor
 513  */
 514
 515 IClassFactory * IDefClF_fnConstructor(LPFNCREATEINSTANCE lpfnCI, PLONG pcRefDll, REFIID riidInst)
 516 {
 517         IDefClFImpl* lpclf;
 518
 519         lpclf = (IDefClFImpl*)HeapAlloc(GetProcessHeap(),0,sizeof(IDefClFImpl));
 520         lpclf->ref = 1;
 521         lpclf->lpVtbl = &dclfvt;
 522         lpclf->lpfnCI = lpfnCI;
 523         lpclf->pcRefDll = pcRefDll;
 524
 525         if (pcRefDll) InterlockedIncrement(pcRefDll);
 526         lpclf->riidInst = riidInst;
 527
 528         TRACE("(%p)%s\n",lpclf, shdebugstr_guid(riidInst));
 529         return (LPCLASSFACTORY)lpclf;
 530 }
 531 /**************************************************************************
 532  *  IDefClF_fnQueryInterface
 533  */
 534 static HRESULT WINAPI IDefClF_fnQueryInterface(
 535   LPCLASSFACTORY iface, REFIID riid, LPVOID *ppvObj)
 536 {
 537         ICOM_THIS(IDefClFImpl,iface);
 538
 539         TRACE("(%p)->(%s)\n",This,shdebugstr_guid(riid));
 540
 541         *ppvObj = NULL;
 542
 543         if(IsEqualIID(riid, &IID_IUnknown) || IsEqualIID(riid, &IID_IClassFactory)) {
 544           *ppvObj = This;
 545           InterlockedIncrement(&This->ref);
 546           return S_OK;
 547         }
 548
 549         TRACE("-- E_NOINTERFACE\n");
 550         return E_NOINTERFACE;
 551 }
 552 /******************************************************************************
 553  * IDefClF_fnAddRef
 554  */
 555 static ULONG WINAPI IDefClF_fnAddRef(LPCLASSFACTORY iface)
 556 {
 557         ICOM_THIS(IDefClFImpl,iface);
 558         TRACE("(%p)->(count=%lu)\n",This,This->ref);
 559
 560         return InterlockedIncrement(&This->ref);
 561 }
 562 /******************************************************************************
 563  * IDefClF_fnRelease
 564  */
 565 static ULONG WINAPI IDefClF_fnRelease(LPCLASSFACTORY iface)
 566 {
 567         ICOM_THIS(IDefClFImpl,iface);
 568         TRACE("(%p)->(count=%lu)\n",This,This->ref);
 569
 570         if (!InterlockedDecrement(&This->ref))
 571         {
 572           if (This->pcRefDll) InterlockedDecrement(This->pcRefDll);
 573
 574           TRACE("-- destroying IClassFactory(%p)\n",This);
 575           HeapFree(GetProcessHeap(),0,This);
 576           return 0;
 577         }
 578         return This->ref;
 579 }
 580 /******************************************************************************
 581  * IDefClF_fnCreateInstance
 582  */
 583 static HRESULT WINAPI IDefClF_fnCreateInstance(
 584   LPCLASSFACTORY iface, LPUNKNOWN pUnkOuter, REFIID riid, LPVOID *ppvObject)
 585 {
 586         ICOM_THIS(IDefClFImpl,iface);
 587
 588         TRACE("%p->(%p,%s,%p)\n",This,pUnkOuter,shdebugstr_guid(riid),ppvObject);
 589
 590         *ppvObject = NULL;
 591
 592         if ( This->riidInst==NULL ||
 593              IsEqualCLSID(riid, This->riidInst) ||
 594              IsEqualCLSID(riid, &IID_IUnknown) )
 595         {
 596           return This->lpfnCI(pUnkOuter, riid, ppvObject);
 597         }
 598
 599         ERR("unknown IID requested %s\n",shdebugstr_guid(riid));
 600         return E_NOINTERFACE;
 601 }
 602 /******************************************************************************
 603  * IDefClF_fnLockServer
 604  */
 605 static HRESULT WINAPI IDefClF_fnLockServer(LPCLASSFACTORY iface, BOOL fLock)
 606 {
 607         ICOM_THIS(IDefClFImpl,iface);
 608         TRACE("%p->(0x%x), not implemented\n",This, fLock);
 609         return E_NOTIMPL;
 610 }
 611
 612 static ICOM_VTABLE(IClassFactory) dclfvt =
 613 {
 614     ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
 615     IDefClF_fnQueryInterface,
 616     IDefClF_fnAddRef,
 617   IDefClF_fnRelease,
 618   IDefClF_fnCreateInstance,
 619   IDefClF_fnLockServer
 620 };
 621
 622 /******************************************************************************
 623  * SHCreateDefClassObject                       [SHELL32.70]
 624  */
 625 HRESULT WINAPI SHCreateDefClassObject(
 626         REFIID  riid,
 627         LPVOID* ppv,
 628         LPFNCREATEINSTANCE lpfnCI,      /* [in] create instance callback entry */
 629         LPDWORD pcRefDll,               /* [in/out] ref count of the dll */
 630         REFIID  riidInst)               /* [in] optional interface to the instance */
 631 {
 632         IClassFactory * pcf;
 633
 634         TRACE("%s %p %p %p %s\n",
 635               shdebugstr_guid(riid), ppv, lpfnCI, pcRefDll, shdebugstr_guid(riidInst));
 636
 637         if (! IsEqualCLSID(riid, &IID_IClassFactory) ) return E_NOINTERFACE;
 638         if (! (pcf = IDefClF_fnConstructor(lpfnCI, pcRefDll, riidInst))) return E_OUTOFMEMORY;
 639         *ppv = pcf;
 640         return NOERROR;
 641 }
 642
 643 /*************************************************************************
 644  *  DragAcceptFiles             [SHELL32.54]
 645  */
 646 void WINAPI DragAcceptFiles(HWND hWnd, BOOL b)
 647 {
 648         LONG exstyle;
 649
 650         if( !IsWindow(hWnd) ) return;
 651         exstyle = GetWindowLongA(hWnd,GWL_EXSTYLE);
 652         if (b)
 653           exstyle |= WS_EX_ACCEPTFILES;
 654         else
 655           exstyle &= ~WS_EX_ACCEPTFILES;
 656         SetWindowLongA(hWnd,GWL_EXSTYLE,exstyle);
 657 }
 658
 659 /*************************************************************************
 660  * DragFinish           [SHELL32.80]
 661  */
 662 void WINAPI DragFinish(HDROP h)
 663 {
 664         TRACE("\n");
 665         GlobalFree((HGLOBAL)h);
 666 }
 667
 668 /*************************************************************************
 669  * DragQueryPoint               [SHELL32.135]
 670  */
 671 BOOL WINAPI DragQueryPoint(HDROP hDrop, POINT *p)
 672 {
 673         DROPFILES *lpDropFileStruct;
 674         BOOL bRet;
 675
 676         TRACE("\n");
 677
 678         lpDropFileStruct = (DROPFILES *) GlobalLock(hDrop);
 679
 680         *p = lpDropFileStruct->pt;
 681         bRet = lpDropFileStruct->fNC;
 682
 683         GlobalUnlock(hDrop);
 684         return bRet;
 685 }
 686
 687 /*************************************************************************
 688  *  DragQueryFile               [SHELL32.81]
 689  *  DragQueryFileA              [SHELL32.82]
 690  */
 691 UINT WINAPI DragQueryFileA(
 692         HDROP hDrop,
 693         UINT lFile,
 694         LPSTR lpszFile,
 695         UINT lLength)
 696 {
 697         LPSTR lpDrop;
 698         UINT i = 0;
 699         DROPFILES *lpDropFileStruct = (DROPFILES *) GlobalLock(hDrop);
 700
 701         TRACE("(%p, %x, %p, %u)\n",     hDrop,lFile,lpszFile,lLength);
 702
 703         if(!lpDropFileStruct) goto end;
 704
 705         lpDrop = (LPSTR) lpDropFileStruct + lpDropFileStruct->pFiles;
 706
 707         if(lpDropFileStruct->fWide == TRUE) {
 708             LPWSTR lpszFileW = NULL;
 709
 710             if(lpszFile) {
 711                 lpszFileW = (LPWSTR) HeapAlloc(GetProcessHeap(), 0, lLength*sizeof(WCHAR));
 712                 if(lpszFileW == NULL) {
 713                     goto end;
 714                 }
 715             }
 716             i = DragQueryFileW(hDrop, lFile, lpszFileW, lLength);
 717
 718             if(lpszFileW) {
 719                 WideCharToMultiByte(CP_ACP, 0, lpszFileW, -1, lpszFile, lLength, 0, NULL);
 720                 HeapFree(GetProcessHeap(), 0, lpszFileW);
 721             }
 722             goto end;
 723         }
 724
 725         while (i++ < lFile)
 726         {
 727           while (*lpDrop++); /* skip filename */
 728           if (!*lpDrop)
 729           {
 730             i = (lFile == 0xFFFFFFFF) ? i : 0;
 731             goto end;
 732           }
 733         }
 734
 735         i = strlen(lpDrop);
 736         i++;
 737         if (!lpszFile ) goto end;   /* needed buffer size */
 738         i = (lLength > i) ? i : lLength;
 739         lstrcpynA (lpszFile,  lpDrop,  i);
 740 end:
 741         GlobalUnlock(hDrop);
 742         return i;
 743 }
 744
 745 /*************************************************************************
 746  *  DragQueryFileW              [SHELL32.133]
 747  */
 748 UINT WINAPI DragQueryFileW(
 749         HDROP hDrop,
 750         UINT lFile,
 751         LPWSTR lpszwFile,
 752         UINT lLength)
 753 {
 754         LPWSTR lpwDrop;
 755         UINT i = 0;
 756         DROPFILES *lpDropFileStruct = (DROPFILES *) GlobalLock(hDrop);
 757
 758         TRACE("(%p, %x, %p, %u)\n", hDrop,lFile,lpszwFile,lLength);
 759
 760         if(!lpDropFileStruct) goto end;
 761
 762         lpwDrop = (LPWSTR) ((LPSTR)lpDropFileStruct + lpDropFileStruct->pFiles);
 763
 764         if(lpDropFileStruct->fWide == FALSE) {
 765             LPSTR lpszFileA = NULL;
 766
 767             if(lpszwFile) {
 768                 lpszFileA = (LPSTR) HeapAlloc(GetProcessHeap(), 0, lLength);
 769                 if(lpszFileA == NULL) {
 770                     goto end;
 771                 }
 772             }
 773             i = DragQueryFileA(hDrop, lFile, lpszFileA, lLength);
 774
 775             if(lpszFileA) {
 776                 MultiByteToWideChar(CP_ACP, 0, lpszFileA, -1, lpszwFile, lLength);
 777                 HeapFree(GetProcessHeap(), 0, lpszFileA);
 778             }
 779             goto end;
 780         }
 781
 782         i = 0;
 783         while (i++ < lFile)
 784         {
 785           while (*lpwDrop++); /* skip filename */
 786           if (!*lpwDrop)
 787           {
 788             i = (lFile == 0xFFFFFFFF) ? i : 0;
 789             goto end;
 790           }
 791         }
 792
 793         i = strlenW(lpwDrop);
 794         i++;
 795         if ( !lpszwFile) goto end;   /* needed buffer size */
 796
 797         i = (lLength > i) ? i : lLength;
 798         lstrcpynW (lpszwFile, lpwDrop, i);
 799 end:
 800         GlobalUnlock(hDrop);
 801         return i;
 802 }