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