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