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