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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, 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 #define NONAMELESSUNION
  30
  31 #include "windef.h"
  32 #include "winbase.h"
  33 #include "shellapi.h"
  34 #include "wingdi.h"
  35 #include "winuser.h"
  36 #include "shlobj.h"
  37 #include "shlguid.h"
  38 #include "shldisp.h"
  39 #include "winreg.h"
  40 #include "winerror.h"
  41
  42 #include "undocshell.h"
  43 #include "wine/unicode.h"
  44 #include "shell32_main.h"
  45
  46 #include "wine/debug.h"
  47 #include "shlwapi.h"
  48 #include "debughlp.h"
  49
  50 WINE_DEFAULT_DEBUG_CHANNEL(shell);
  51
  52 extern INT WINAPI SHStringFromGUIDW(REFGUID guid, LPWSTR lpszDest, INT cchMax);  /* shlwapi.24 */
  53
  54 /**************************************************************************
  55  * Default ClassFactory types
  56  */
  57 typedef HRESULT (CALLBACK *LPFNCREATEINSTANCE)(IUnknown* pUnkOuter, REFIID riid, LPVOID* ppvObject);
  58 static IClassFactory * IDefClF_fnConstructor(LPFNCREATEINSTANCE lpfnCI, PLONG pcRefDll, REFIID riidInst);
  59
  60 /* this table contains all CLSIDs of shell32 objects */
  61 static const struct {
  62         REFIID                  riid;
  63         LPFNCREATEINSTANCE      lpfnCI;
  64 } InterfaceTable[] = {
  65
  66         {&CLSID_AutoComplete,   IAutoComplete_Constructor},
  67         {&CLSID_ControlPanel,   IControlPanel_Constructor},
  68         {&CLSID_DragDropHelper, IDropTargetHelper_Constructor},
  69         {&CLSID_FolderShortcut, FolderShortcut_Constructor},
  70         {&CLSID_MyComputer,     ISF_MyComputer_Constructor},
  71         {&CLSID_MyDocuments,    MyDocuments_Constructor},
  72         {&CLSID_NetworkPlaces,  ISF_NetworkPlaces_Constructor},
  73         {&CLSID_Printers,       Printers_Constructor},
  74         {&CLSID_QueryAssociations, QueryAssociations_Constructor},
  75         {&CLSID_RecycleBin,     RecycleBin_Constructor},
  76         {&CLSID_ShellDesktop,   ISF_Desktop_Constructor},
  77         {&CLSID_ShellFSFolder,  IFSFolder_Constructor},
  78         {&CLSID_ShellItem,      IShellItem_Constructor},
  79         {&CLSID_ShellLink,      IShellLink_Constructor},
  80         {&CLSID_UnixDosFolder,  UnixDosFolder_Constructor},
  81         {&CLSID_UnixFolder,     UnixFolder_Constructor},
  82         {&CLSID_ExplorerBrowser,ExplorerBrowser_Constructor},
  83         {&CLSID_KnownFolderManager, KnownFolderManager_Constructor},
  84         {&CLSID_Shell,          IShellDispatch_Constructor},
  85         {NULL, NULL}
  86 };
  87
  88 /*************************************************************************
  89  * SHCoCreateInstance [SHELL32.102]
  90  *
  91  * Equivalent to CoCreateInstance. Under Windows 9x this function could sometimes
  92  * use the shell32 built-in "mini-COM" without the need to load ole32.dll - see
  93  * SHLoadOLE for details.
  94  *
  95  * Under wine if a "LoadWithoutCOM" value is present or the object resides in
  96  * shell32.dll the function will load the object manually without the help of ole32
  97  *
  98  * NOTES
  99  *     exported by ordinal
 100  *
 101  * SEE ALSO
 102  *     CoCreateInstace, SHLoadOLE
 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         const   CLSID * myclsid = clsid;
 114         WCHAR   sKeyName[MAX_PATH];
 115         static const WCHAR sCLSID[] = {'C','L','S','I','D','\\','\0'};
 116         WCHAR   sClassID[60];
 117         static const WCHAR sInProcServer32[] = {'\\','I','n','p','r','o','c','S','e','r','v','e','r','3','2','\0'};
 118         static const WCHAR sLoadWithoutCOM[] = {'L','o','a','d','W','i','t','h','o','u','t','C','O','M','\0'};
 119         WCHAR   sDllPath[MAX_PATH];
 120         HKEY    hKey = 0;
 121         DWORD   dwSize;
 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         if (SUCCEEDED(DllGetClassObject(myclsid, &IID_IClassFactory,(LPVOID*)&pcf)))
 139         {
 140             hres = IClassFactory_CreateInstance(pcf, pUnkOuter, refiid, ppv);
 141             IClassFactory_Release(pcf);
 142             goto end;
 143         }
 144
 145         /* we look up the dll path in the registry */
 146         SHStringFromGUIDW(myclsid, sClassID, sizeof(sClassID)/sizeof(WCHAR));
 147         lstrcpyW(sKeyName, sCLSID);
 148         lstrcatW(sKeyName, sClassID);
 149         lstrcatW(sKeyName, sInProcServer32);
 150
 151         if (RegOpenKeyExW(HKEY_CLASSES_ROOT, sKeyName, 0, KEY_READ, &hKey))
 152             return E_ACCESSDENIED;
 153
 154         /* if a special registry key is set, we load a shell extension without help of OLE32 */
 155         if (!SHQueryValueExW(hKey, sLoadWithoutCOM, 0, 0, 0, 0))
 156         {
 157             /* load an external dll without ole32 */
 158             HANDLE hLibrary;
 159             typedef HRESULT (CALLBACK *DllGetClassObjectFunc)(REFCLSID clsid, REFIID iid, LPVOID *ppv);
 160             DllGetClassObjectFunc DllGetClassObject;
 161
 162             dwSize = sizeof(sDllPath);
 163             SHQueryValueExW(hKey, NULL, 0,0, sDllPath, &dwSize );
 164
 165             if ((hLibrary = LoadLibraryExW(sDllPath, 0, LOAD_WITH_ALTERED_SEARCH_PATH)) == 0) {
 166                 ERR("couldn't load InprocServer32 dll %s\n", debugstr_w(sDllPath));
 167                 hres = E_ACCESSDENIED;
 168                 goto end;
 169             } else if (!(DllGetClassObject = (DllGetClassObjectFunc)GetProcAddress(hLibrary, "DllGetClassObject"))) {
 170                 ERR("couldn't find function DllGetClassObject in %s\n", debugstr_w(sDllPath));
 171                 FreeLibrary( hLibrary );
 172                 hres = E_ACCESSDENIED;
 173                 goto end;
 174             } else if (FAILED(hres = DllGetClassObject(myclsid, &IID_IClassFactory, (LPVOID*)&pcf))) {
 175                     TRACE("GetClassObject failed 0x%08x\n", hres);
 176                     goto end;
 177             }
 178
 179             hres = IClassFactory_CreateInstance(pcf, pUnkOuter, refiid, ppv);
 180             IClassFactory_Release(pcf);
 181         } else {
 182
 183             /* load an external dll in the usual way */
 184             hres = CoCreateInstance(myclsid, pUnkOuter, CLSCTX_INPROC_SERVER, refiid, ppv);
 185         }
 186
 187 end:
 188         if (hKey) RegCloseKey(hKey);
 189         if(hres!=S_OK)
 190         {
 191           ERR("failed (0x%08x) to create CLSID:%s IID:%s\n",
 192               hres, shdebugstr_guid(myclsid), shdebugstr_guid(refiid));
 193           ERR("class not found in registry\n");
 194         }
 195
 196         TRACE("-- instance: %p\n",*ppv);
 197         return hres;
 198 }
 199
 200 /*************************************************************************
 201  * DllGetClassObject     [SHELL32.@]
 202  * SHDllGetClassObject   [SHELL32.128]
 203  */
 204 HRESULT WINAPI DllGetClassObject(REFCLSID rclsid, REFIID iid, LPVOID *ppv)
 205 {
 206         HRESULT hres = E_OUTOFMEMORY;
 207         IClassFactory * pcf = NULL;
 208         int i;
 209
 210         TRACE("CLSID:%s,IID:%s\n",shdebugstr_guid(rclsid),shdebugstr_guid(iid));
 211
 212         if (!ppv) return E_INVALIDARG;
 213         *ppv = NULL;
 214
 215         /* search our internal interface table */
 216         for(i=0;InterfaceTable[i].riid;i++) {
 217             if(IsEqualIID(InterfaceTable[i].riid, rclsid)) {
 218                 TRACE("index[%u]\n", i);
 219                 pcf = IDefClF_fnConstructor(InterfaceTable[i].lpfnCI, NULL, NULL);
 220             }
 221         }
 222
 223         if (!pcf) {
 224             FIXME("failed for CLSID=%s\n", shdebugstr_guid(rclsid));
 225             return CLASS_E_CLASSNOTAVAILABLE;
 226         }
 227
 228         hres = IClassFactory_QueryInterface(pcf, iid, ppv);
 229         IClassFactory_Release(pcf);
 230
 231         TRACE("-- pointer to class factory: %p\n",*ppv);
 232         return hres;
 233 }
 234
 235 /*************************************************************************
 236  * SHCLSIDFromString                            [SHELL32.147]
 237  *
 238  * Under Windows 9x this was an ANSI version of CLSIDFromString. It also allowed
 239  * to avoid dependency on ole32.dll (see SHLoadOLE for details).
 240  *
 241  * Under Windows NT/2000/XP this is equivalent to CLSIDFromString
 242  *
 243  * NOTES
 244  *     exported by ordinal
 245  *
 246  * SEE ALSO
 247  *     CLSIDFromString, SHLoadOLE
 248  */
 249 DWORD WINAPI SHCLSIDFromStringA (LPCSTR clsid, CLSID *id)
 250 {
 251     WCHAR buffer[40];
 252     TRACE("(%p(%s) %p)\n", clsid, clsid, id);
 253     if (!MultiByteToWideChar( CP_ACP, 0, clsid, -1, buffer, sizeof(buffer)/sizeof(WCHAR) ))
 254         return CO_E_CLASSSTRING;
 255     return CLSIDFromString( buffer, id );
 256 }
 257 DWORD WINAPI SHCLSIDFromStringW (LPCWSTR clsid, CLSID *id)
 258 {
 259         TRACE("(%p(%s) %p)\n", clsid, debugstr_w(clsid), id);
 260         return CLSIDFromString(clsid, id);
 261 }
 262 DWORD WINAPI SHCLSIDFromStringAW (LPCVOID clsid, CLSID *id)
 263 {
 264         if (SHELL_OsIsUnicode())
 265           return SHCLSIDFromStringW (clsid, id);
 266         return SHCLSIDFromStringA (clsid, id);
 267 }
 268
 269 /*************************************************************************
 270  *                       SHGetMalloc                    [SHELL32.@]
 271  *
 272  * Equivalent to CoGetMalloc(MEMCTX_TASK, ...). Under Windows 9x this function
 273  * could use the shell32 built-in "mini-COM" without the need to load ole32.dll -
 274  * see SHLoadOLE for details.
 275  *
 276  * PARAMS
 277  *  lpmal [O] Destination for IMalloc interface.
 278  *
 279  * RETURNS
 280  *  Success: S_OK. lpmal contains the shells IMalloc interface.
 281  *  Failure. An HRESULT error code.
 282  *
 283  * SEE ALSO
 284  *  CoGetMalloc, SHLoadOLE
 285  */
 286 HRESULT WINAPI SHGetMalloc(LPMALLOC *lpmal)
 287 {
 288         TRACE("(%p)\n", lpmal);
 289         return CoGetMalloc(MEMCTX_TASK, lpmal);
 290 }
 291
 292 /*************************************************************************
 293  * SHAlloc                                      [SHELL32.196]
 294  *
 295  * Equivalent to CoTaskMemAlloc. Under Windows 9x this function could use
 296  * the shell32 built-in "mini-COM" without the need to load ole32.dll -
 297  * see SHLoadOLE for details.
 298  *
 299  * NOTES
 300  *     exported by ordinal
 301  *
 302  * SEE ALSO
 303  *     CoTaskMemAlloc, SHLoadOLE
 304  */
 305 LPVOID WINAPI SHAlloc(DWORD len)
 306 {
 307         LPVOID ret;
 308
 309         ret = CoTaskMemAlloc(len);
 310         TRACE("%u bytes at %p\n",len, ret);
 311         return ret;
 312 }
 313
 314 /*************************************************************************
 315  * SHFree                                       [SHELL32.195]
 316  *
 317  * Equivalent to CoTaskMemFree. Under Windows 9x this function could use
 318  * the shell32 built-in "mini-COM" without the need to load ole32.dll -
 319  * see SHLoadOLE for details.
 320  *
 321  * NOTES
 322  *     exported by ordinal
 323  *
 324  * SEE ALSO
 325  *     CoTaskMemFree, SHLoadOLE
 326  */
 327 void WINAPI SHFree(LPVOID pv)
 328 {
 329         TRACE("%p\n",pv);
 330         CoTaskMemFree(pv);
 331 }
 332
 333 /*************************************************************************
 334  * SHGetDesktopFolder                   [SHELL32.@]
 335  */
 336 HRESULT WINAPI SHGetDesktopFolder(IShellFolder **psf)
 337 {
 338         HRESULT hres;
 339
 340         TRACE("(%p)\n", psf);
 341
 342         if(!psf) return E_INVALIDARG;
 343
 344         *psf = NULL;
 345         hres = ISF_Desktop_Constructor(NULL, &IID_IShellFolder, (LPVOID*)psf);
 346
 347         TRACE("-- %p->(%p) 0x%08x\n", psf, *psf, hres);
 348         return hres;
 349 }
 350 /**************************************************************************
 351  * Default ClassFactory Implementation
 352  *
 353  * SHCreateDefClassObject
 354  *
 355  * NOTES
 356  *  Helper function for dlls without their own classfactory.
 357  *  A generic classfactory is returned.
 358  *  When the CreateInstance of the cf is called the callback is executed.
 359  */
 360
 361 typedef struct
 362 {
 363     IClassFactory               IClassFactory_iface;
 364     LONG                        ref;
 365     CLSID                       *rclsid;
 366     LPFNCREATEINSTANCE          lpfnCI;
 367     const IID *                 riidInst;
 368     LONG *                      pcRefDll; /* pointer to refcounter in external dll (ugrrr...) */
 369 } IDefClFImpl;
 370
 371 static inline IDefClFImpl *impl_from_IClassFactory(IClassFactory *iface)
 372 {
 373         return CONTAINING_RECORD(iface, IDefClFImpl, IClassFactory_iface);
 374 }
 375
 376 static const IClassFactoryVtbl dclfvt;
 377
 378 /**************************************************************************
 379  *  IDefClF_fnConstructor
 380  */
 381
 382 static IClassFactory * IDefClF_fnConstructor(LPFNCREATEINSTANCE lpfnCI, PLONG pcRefDll, REFIID riidInst)
 383 {
 384         IDefClFImpl* lpclf;
 385
 386         lpclf = HeapAlloc(GetProcessHeap(),0,sizeof(IDefClFImpl));
 387         lpclf->ref = 1;
 388         lpclf->IClassFactory_iface.lpVtbl = &dclfvt;
 389         lpclf->lpfnCI = lpfnCI;
 390         lpclf->pcRefDll = pcRefDll;
 391
 392         if (pcRefDll) InterlockedIncrement(pcRefDll);
 393         lpclf->riidInst = riidInst;
 394
 395         TRACE("(%p)%s\n",lpclf, shdebugstr_guid(riidInst));
 396         return (LPCLASSFACTORY)lpclf;
 397 }
 398 /**************************************************************************
 399  *  IDefClF_fnQueryInterface
 400  */
 401 static HRESULT WINAPI IDefClF_fnQueryInterface(
 402   LPCLASSFACTORY iface, REFIID riid, LPVOID *ppvObj)
 403 {
 404         IDefClFImpl *This = impl_from_IClassFactory(iface);
 405
 406         TRACE("(%p)->(%s)\n",This,shdebugstr_guid(riid));
 407
 408         *ppvObj = NULL;
 409
 410         if(IsEqualIID(riid, &IID_IUnknown) || IsEqualIID(riid, &IID_IClassFactory)) {
 411           *ppvObj = This;
 412           InterlockedIncrement(&This->ref);
 413           return S_OK;
 414         }
 415
 416         TRACE("-- E_NOINTERFACE\n");
 417         return E_NOINTERFACE;
 418 }
 419 /******************************************************************************
 420  * IDefClF_fnAddRef
 421  */
 422 static ULONG WINAPI IDefClF_fnAddRef(LPCLASSFACTORY iface)
 423 {
 424         IDefClFImpl *This = impl_from_IClassFactory(iface);
 425         ULONG refCount = InterlockedIncrement(&This->ref);
 426
 427         TRACE("(%p)->(count=%u)\n", This, refCount - 1);
 428
 429         return refCount;
 430 }
 431 /******************************************************************************
 432  * IDefClF_fnRelease
 433  */
 434 static ULONG WINAPI IDefClF_fnRelease(LPCLASSFACTORY iface)
 435 {
 436         IDefClFImpl *This = impl_from_IClassFactory(iface);
 437         ULONG refCount = InterlockedDecrement(&This->ref);
 438
 439         TRACE("(%p)->(count=%u)\n", This, refCount + 1);
 440
 441         if (!refCount)
 442         {
 443           if (This->pcRefDll) InterlockedDecrement(This->pcRefDll);
 444
 445           TRACE("-- destroying IClassFactory(%p)\n",This);
 446           HeapFree(GetProcessHeap(),0,This);
 447           return 0;
 448         }
 449         return refCount;
 450 }
 451 /******************************************************************************
 452  * IDefClF_fnCreateInstance
 453  */
 454 static HRESULT WINAPI IDefClF_fnCreateInstance(
 455   LPCLASSFACTORY iface, LPUNKNOWN pUnkOuter, REFIID riid, LPVOID *ppvObject)
 456 {
 457         IDefClFImpl *This = impl_from_IClassFactory(iface);
 458
 459         TRACE("%p->(%p,%s,%p)\n",This,pUnkOuter,shdebugstr_guid(riid),ppvObject);
 460
 461         *ppvObject = NULL;
 462
 463         if ( This->riidInst==NULL ||
 464              IsEqualCLSID(riid, This->riidInst) ||
 465              IsEqualCLSID(riid, &IID_IUnknown) )
 466         {
 467           return This->lpfnCI(pUnkOuter, riid, ppvObject);
 468         }
 469
 470         ERR("unknown IID requested %s\n",shdebugstr_guid(riid));
 471         return E_NOINTERFACE;
 472 }
 473 /******************************************************************************
 474  * IDefClF_fnLockServer
 475  */
 476 static HRESULT WINAPI IDefClF_fnLockServer(LPCLASSFACTORY iface, BOOL fLock)
 477 {
 478         IDefClFImpl *This = impl_from_IClassFactory(iface);
 479         TRACE("%p->(0x%x), not implemented\n",This, fLock);
 480         return E_NOTIMPL;
 481 }
 482
 483 static const IClassFactoryVtbl dclfvt =
 484 {
 485     IDefClF_fnQueryInterface,
 486     IDefClF_fnAddRef,
 487   IDefClF_fnRelease,
 488   IDefClF_fnCreateInstance,
 489   IDefClF_fnLockServer
 490 };
 491
 492 /******************************************************************************
 493  * SHCreateDefClassObject                       [SHELL32.70]
 494  */
 495 HRESULT WINAPI SHCreateDefClassObject(
 496         REFIID  riid,
 497         LPVOID* ppv,
 498         LPFNCREATEINSTANCE lpfnCI,      /* [in] create instance callback entry */
 499         LPDWORD pcRefDll,               /* [in/out] ref count of the dll */
 500         REFIID  riidInst)               /* [in] optional interface to the instance */
 501 {
 502         IClassFactory * pcf;
 503
 504         TRACE("%s %p %p %p %s\n",
 505               shdebugstr_guid(riid), ppv, lpfnCI, pcRefDll, shdebugstr_guid(riidInst));
 506
 507         if (! IsEqualCLSID(riid, &IID_IClassFactory) ) return E_NOINTERFACE;
 508         if (! (pcf = IDefClF_fnConstructor(lpfnCI, (PLONG)pcRefDll, riidInst))) return E_OUTOFMEMORY;
 509         *ppv = pcf;
 510         return S_OK;
 511 }
 512
 513 /*************************************************************************
 514  *  DragAcceptFiles             [SHELL32.@]
 515  */
 516 void WINAPI DragAcceptFiles(HWND hWnd, BOOL b)
 517 {
 518         LONG exstyle;
 519
 520         if( !IsWindow(hWnd) ) return;
 521         exstyle = GetWindowLongA(hWnd,GWL_EXSTYLE);
 522         if (b)
 523           exstyle |= WS_EX_ACCEPTFILES;
 524         else
 525           exstyle &= ~WS_EX_ACCEPTFILES;
 526         SetWindowLongA(hWnd,GWL_EXSTYLE,exstyle);
 527 }
 528
 529 /*************************************************************************
 530  * DragFinish           [SHELL32.@]
 531  */
 532 void WINAPI DragFinish(HDROP h)
 533 {
 534         TRACE("\n");
 535         GlobalFree(h);
 536 }
 537
 538 /*************************************************************************
 539  * DragQueryPoint               [SHELL32.@]
 540  */
 541 BOOL WINAPI DragQueryPoint(HDROP hDrop, POINT *p)
 542 {
 543         DROPFILES *lpDropFileStruct;
 544         BOOL bRet;
 545
 546         TRACE("\n");
 547
 548         lpDropFileStruct = GlobalLock(hDrop);
 549
 550         *p = lpDropFileStruct->pt;
 551         bRet = lpDropFileStruct->fNC;
 552
 553         GlobalUnlock(hDrop);
 554         return bRet;
 555 }
 556
 557 /*************************************************************************
 558  *  DragQueryFileA              [SHELL32.@]
 559  *  DragQueryFile               [SHELL32.@]
 560  */
 561 UINT WINAPI DragQueryFileA(
 562         HDROP hDrop,
 563         UINT lFile,
 564         LPSTR lpszFile,
 565         UINT lLength)
 566 {
 567         LPSTR lpDrop;
 568         UINT i = 0;
 569         DROPFILES *lpDropFileStruct = GlobalLock(hDrop);
 570
 571         TRACE("(%p, %x, %p, %u)\n",     hDrop,lFile,lpszFile,lLength);
 572
 573         if(!lpDropFileStruct) goto end;
 574
 575         lpDrop = (LPSTR) lpDropFileStruct + lpDropFileStruct->pFiles;
 576
 577         if(lpDropFileStruct->fWide) {
 578             LPWSTR lpszFileW = NULL;
 579
 580             if(lpszFile) {
 581                 lpszFileW = HeapAlloc(GetProcessHeap(), 0, lLength*sizeof(WCHAR));
 582                 if(lpszFileW == NULL) {
 583                     goto end;
 584                 }
 585             }
 586             i = DragQueryFileW(hDrop, lFile, lpszFileW, lLength);
 587
 588             if(lpszFileW) {
 589                 WideCharToMultiByte(CP_ACP, 0, lpszFileW, -1, lpszFile, lLength, 0, NULL);
 590                 HeapFree(GetProcessHeap(), 0, lpszFileW);
 591             }
 592             goto end;
 593         }
 594
 595         while (i++ < lFile)
 596         {
 597           while (*lpDrop++); /* skip filename */
 598           if (!*lpDrop)
 599           {
 600             i = (lFile == 0xFFFFFFFF) ? i : 0;
 601             goto end;
 602           }
 603         }
 604
 605         i = strlen(lpDrop);
 606         if (!lpszFile ) goto end;   /* needed buffer size */
 607         lstrcpynA (lpszFile, lpDrop, lLength);
 608 end:
 609         GlobalUnlock(hDrop);
 610         return i;
 611 }
 612
 613 /*************************************************************************
 614  *  DragQueryFileW              [SHELL32.@]
 615  */
 616 UINT WINAPI DragQueryFileW(
 617         HDROP hDrop,
 618         UINT lFile,
 619         LPWSTR lpszwFile,
 620         UINT lLength)
 621 {
 622         LPWSTR lpwDrop;
 623         UINT i = 0;
 624         DROPFILES *lpDropFileStruct = GlobalLock(hDrop);
 625
 626         TRACE("(%p, %x, %p, %u)\n", hDrop,lFile,lpszwFile,lLength);
 627
 628         if(!lpDropFileStruct) goto end;
 629
 630         lpwDrop = (LPWSTR) ((LPSTR)lpDropFileStruct + lpDropFileStruct->pFiles);
 631
 632         if(lpDropFileStruct->fWide == FALSE) {
 633             LPSTR lpszFileA = NULL;
 634
 635             if(lpszwFile) {
 636                 lpszFileA = HeapAlloc(GetProcessHeap(), 0, lLength);
 637                 if(lpszFileA == NULL) {
 638                     goto end;
 639                 }
 640             }
 641             i = DragQueryFileA(hDrop, lFile, lpszFileA, lLength);
 642
 643             if(lpszFileA) {
 644                 MultiByteToWideChar(CP_ACP, 0, lpszFileA, -1, lpszwFile, lLength);
 645                 HeapFree(GetProcessHeap(), 0, lpszFileA);
 646             }
 647             goto end;
 648         }
 649
 650         i = 0;
 651         while (i++ < lFile)
 652         {
 653           while (*lpwDrop++); /* skip filename */
 654           if (!*lpwDrop)
 655           {
 656             i = (lFile == 0xFFFFFFFF) ? i : 0;
 657             goto end;
 658           }
 659         }
 660
 661         i = strlenW(lpwDrop);
 662         if ( !lpszwFile) goto end;   /* needed buffer size */
 663         lstrcpynW (lpszwFile, lpwDrop, lLength);
 664 end:
 665         GlobalUnlock(hDrop);
 666         return i;
 667 }
 668
 669 /*************************************************************************
 670  *  SHPropStgCreate             [SHELL32.685]
 671  */
 672 HRESULT WINAPI SHPropStgCreate(IPropertySetStorage *psstg, REFFMTID fmtid,
 673         const CLSID *pclsid, DWORD grfFlags, DWORD grfMode,
 674         DWORD dwDisposition, IPropertyStorage **ppstg, UINT *puCodePage)
 675 {
 676     PROPSPEC prop;
 677     PROPVARIANT ret;
 678     HRESULT hres;
 679
 680     TRACE("%p %s %s %x %x %x %p %p\n", psstg, debugstr_guid(fmtid), debugstr_guid(pclsid),
 681             grfFlags, grfMode, dwDisposition, ppstg, puCodePage);
 682
 683     hres = IPropertySetStorage_Open(psstg, fmtid, grfMode, ppstg);
 684
 685     switch(dwDisposition) {
 686     case CREATE_ALWAYS:
 687         if(SUCCEEDED(hres)) {
 688             IPropertyStorage_Release(*ppstg);
 689             hres = IPropertySetStorage_Delete(psstg, fmtid);
 690             if(FAILED(hres))
 691                 return hres;
 692             hres = E_FAIL;
 693         }
 694
 695     case OPEN_ALWAYS:
 696     case CREATE_NEW:
 697         if(FAILED(hres))
 698             hres = IPropertySetStorage_Create(psstg, fmtid, pclsid,
 699                     grfFlags, grfMode, ppstg);
 700
 701     case OPEN_EXISTING:
 702         if(FAILED(hres))
 703             return hres;
 704
 705         if(puCodePage) {
 706             prop.ulKind = PRSPEC_PROPID;
 707             prop.u.propid = PID_CODEPAGE;
 708             hres = IPropertyStorage_ReadMultiple(*ppstg, 1, &prop, &ret);
 709             if(FAILED(hres) || ret.vt!=VT_I2)
 710                 *puCodePage = 0;
 711             else
 712                 *puCodePage = ret.u.iVal;
 713         }
 714     }
 715
 716     return S_OK;
 717 }
 718
 719 /*************************************************************************
 720  *  SHPropStgReadMultiple       [SHELL32.688]
 721  */
 722 HRESULT WINAPI SHPropStgReadMultiple(IPropertyStorage *pps, UINT uCodePage,
 723         ULONG cpspec, const PROPSPEC *rgpspec, PROPVARIANT *rgvar)
 724 {
 725     STATPROPSETSTG stat;
 726     HRESULT hres;
 727
 728     FIXME("%p %u %u %p %p\n", pps, uCodePage, cpspec, rgpspec, rgvar);
 729
 730     memset(rgvar, 0, cpspec*sizeof(PROPVARIANT));
 731     hres = IPropertyStorage_ReadMultiple(pps, cpspec, rgpspec, rgvar);
 732     if(FAILED(hres))
 733         return hres;
 734
 735     if(!uCodePage) {
 736         PROPSPEC prop;
 737         PROPVARIANT ret;
 738
 739         prop.ulKind = PRSPEC_PROPID;
 740         prop.u.propid = PID_CODEPAGE;
 741         hres = IPropertyStorage_ReadMultiple(pps, 1, &prop, &ret);
 742         if(FAILED(hres) || ret.vt!=VT_I2)
 743             return S_OK;
 744
 745         uCodePage = ret.u.iVal;
 746     }
 747
 748     hres = IPropertyStorage_Stat(pps, &stat);
 749     if(FAILED(hres))
 750         return S_OK;
 751
 752     /* TODO: do something with codepage and stat */
 753     return S_OK;
 754 }
 755
 756 /*************************************************************************
 757  *  SHPropStgWriteMultiple      [SHELL32.689]
 758  */
 759 HRESULT WINAPI SHPropStgWriteMultiple(IPropertyStorage *pps, UINT *uCodePage,
 760         ULONG cpspec, const PROPSPEC *rgpspec, PROPVARIANT *rgvar, PROPID propidNameFirst)
 761 {
 762     STATPROPSETSTG stat;
 763     UINT codepage;
 764     HRESULT hres;
 765
 766     FIXME("%p %p %u %p %p %d\n", pps, uCodePage, cpspec, rgpspec, rgvar, propidNameFirst);
 767
 768     hres = IPropertyStorage_Stat(pps, &stat);
 769     if(FAILED(hres))
 770         return hres;
 771
 772     if(uCodePage && *uCodePage)
 773         codepage = *uCodePage;
 774     else {
 775         PROPSPEC prop;
 776         PROPVARIANT ret;
 777
 778         prop.ulKind = PRSPEC_PROPID;
 779         prop.u.propid = PID_CODEPAGE;
 780         hres = IPropertyStorage_ReadMultiple(pps, 1, &prop, &ret);
 781         if(FAILED(hres))
 782             return hres;
 783         if(ret.vt!=VT_I2 || !ret.u.iVal)
 784             return E_FAIL;
 785
 786         codepage = ret.u.iVal;
 787         if(uCodePage)
 788             *uCodePage = codepage;
 789     }
 790
 791     /* TODO: do something with codepage and stat */
 792
 793     hres = IPropertyStorage_WriteMultiple(pps, cpspec, rgpspec, rgvar, propidNameFirst);
 794     return hres;
 795 }