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  */
   8
   9 #include <stdlib.h>
  10 #include <string.h>
  11
  12 #include "shlobj.h"
  13 #include "shellapi.h"
  14 #include "shlguid.h"
  15 #include "winreg.h"
  16 #include "wine/unicode.h"
  17 #include "winerror.h"
  18 #include "debugtools.h"
  19
  20 #include "shell32_main.h"
  21
  22 DEFAULT_DEBUG_CHANNEL(shell);
  23
  24 DWORD WINAPI SHCLSIDFromStringA (LPSTR clsid, CLSID *id);
  25 extern IShellFolder * IShellFolder_Constructor(
  26         IShellFolder * psf,
  27         LPITEMIDLIST pidl);
  28 extern HRESULT IFSFolder_Constructor(
  29         IUnknown * pUnkOuter,
  30         REFIID riid,
  31         LPVOID * ppv);
  32
  33 /*************************************************************************
  34  * SHCoCreateInstance [SHELL32.102]
  35  *
  36  * NOTES
  37  *     exported by ordinal
  38  */
  39 LRESULT WINAPI SHCoCreateInstance(
  40         LPSTR aclsid,
  41         REFCLSID clsid,
  42         IUnknown * unknownouter,
  43         REFIID refiid,
  44         LPVOID *ppv)
  45 {
  46         DWORD   hres;
  47         IID     iid;
  48         CLSID * myclsid = (CLSID*)clsid;
  49
  50         if (!clsid)
  51         {
  52           if (!aclsid) return REGDB_E_CLASSNOTREG;
  53           SHCLSIDFromStringA(aclsid, &iid);
  54           myclsid = &iid;
  55         }
  56
  57         TRACE("(%p,\n\tCLSID:\t%s, unk:%p\n\tIID:\t%s,%p)\n",
  58                 aclsid,debugstr_guid(myclsid),unknownouter,debugstr_guid(refiid),ppv);
  59
  60         if IsEqualCLSID(myclsid, &CLSID_ShellFSFolder)
  61         {
  62           hres = IFSFolder_Constructor(unknownouter, refiid, ppv);
  63         }
  64         else
  65         {
  66           hres = CoCreateInstance(myclsid, unknownouter, CLSCTX_INPROC_SERVER, refiid, ppv);
  67         }
  68
  69         if(hres!=S_OK)
  70         {
  71           ERR("failed (0x%08lx) to create \n\tCLSID:\t%s\n\tIID:\t%s\n",
  72               hres, debugstr_guid(myclsid), debugstr_guid(refiid));
  73           ERR("class not found in registry\n");
  74         }
  75
  76         TRACE("-- instance: %p\n",*ppv);
  77         return hres;
  78 }
  79
  80 /*************************************************************************
  81  * SHELL32_DllGetClassObject   [SHELL32.128]
  82  */
  83 HRESULT WINAPI SHELL32_DllGetClassObject(REFCLSID rclsid, REFIID iid,LPVOID *ppv)
  84 {       HRESULT hres = E_OUTOFMEMORY;
  85         LPCLASSFACTORY lpclf;
  86
  87         TRACE("\n\tCLSID:\t%s,\n\tIID:\t%s\n",debugstr_guid(rclsid),debugstr_guid(iid));
  88
  89         *ppv = NULL;
  90
  91         if(IsEqualCLSID(rclsid, &CLSID_ShellDesktop)||
  92            IsEqualCLSID(rclsid, &CLSID_ShellLink))
  93         {
  94           lpclf = IClassFactory_Constructor( rclsid );
  95
  96           if(lpclf)
  97           {
  98             hres = IClassFactory_QueryInterface(lpclf,iid, ppv);
  99             IClassFactory_Release(lpclf);
 100           }
 101         }
 102         else
 103         {
 104           WARN("-- CLSID not found\n");
 105           hres = CLASS_E_CLASSNOTAVAILABLE;
 106         }
 107         TRACE("-- pointer to class factory: %p\n",*ppv);
 108         return hres;
 109 }
 110
 111 /*************************************************************************
 112  * SHCLSIDFromString                            [SHELL32.147]
 113  *
 114  * NOTES
 115  *     exported by ordinal
 116  */
 117 DWORD WINAPI SHCLSIDFromStringA (LPSTR clsid, CLSID *id)
 118 {
 119     WCHAR buffer[40];
 120     TRACE("(%p(%s) %p)\n", clsid, clsid, id);
 121     if (!MultiByteToWideChar( CP_ACP, 0, clsid, -1, buffer, sizeof(buffer)/sizeof(WCHAR) ))
 122         return CO_E_CLASSSTRING;
 123     return CLSIDFromString( buffer, id );
 124 }
 125 DWORD WINAPI SHCLSIDFromStringW (LPWSTR clsid, CLSID *id)
 126 {
 127         TRACE("(%p(%s) %p)\n", clsid, debugstr_w(clsid), id);
 128         return CLSIDFromString(clsid, id);
 129 }
 130 DWORD WINAPI SHCLSIDFromStringAW (LPVOID clsid, CLSID *id)
 131 {
 132         if (SHELL_OsIsUnicode())
 133           return SHCLSIDFromStringW (clsid, id);
 134         return SHCLSIDFromStringA (clsid, id);
 135 }
 136
 137 /*************************************************************************
 138  *                       SHGetMalloc                    [SHELL32.@]
 139  * returns the interface to shell malloc.
 140  *
 141  * [SDK header win95/shlobj.h:
 142  * equivalent to:  #define SHGetMalloc(ppmem)   CoGetMalloc(MEMCTX_TASK, ppmem)
 143  * ]
 144  * What we are currently doing is not very wrong, since we always use the same
 145  * heap (ProcessHeap).
 146  */
 147 DWORD WINAPI SHGetMalloc(LPMALLOC *lpmal)
 148 {
 149         TRACE("(%p)\n", lpmal);
 150         return CoGetMalloc(MEMCTX_TASK, lpmal);
 151 }
 152
 153 /*************************************************************************
 154  * SHGetDesktopFolder                   [SHELL32.@]
 155  */
 156 LPSHELLFOLDER pdesktopfolder=NULL;
 157
 158 DWORD WINAPI SHGetDesktopFolder(IShellFolder **psf)
 159 {
 160         HRESULT hres = S_OK;
 161         LPCLASSFACTORY lpclf;
 162         TRACE("%p->(%p)\n",psf,*psf);
 163
 164         *psf=NULL;
 165
 166         if (!pdesktopfolder)
 167         {
 168           lpclf = IClassFactory_Constructor(&CLSID_ShellDesktop);
 169           if(lpclf)
 170           {
 171             hres = IClassFactory_CreateInstance(lpclf,NULL,(REFIID)&IID_IShellFolder, (void*)&pdesktopfolder);
 172             IClassFactory_Release(lpclf);
 173           }
 174         }
 175
 176         if (pdesktopfolder)
 177         {
 178           /* even if we create the folder, add a ref so the application can´t destroy the folder*/
 179           IShellFolder_AddRef(pdesktopfolder);
 180           *psf = pdesktopfolder;
 181         }
 182
 183         TRACE("-- %p->(%p)\n",psf, *psf);
 184         return hres;
 185 }
 186
 187 /**************************************************************************
 188 *  IClassFactory Implementation
 189 */
 190
 191 typedef struct
 192 {
 193     /* IUnknown fields */
 194     ICOM_VFIELD(IClassFactory);
 195     DWORD                       ref;
 196     CLSID                       *rclsid;
 197 } IClassFactoryImpl;
 198
 199 static ICOM_VTABLE(IClassFactory) clfvt;
 200
 201 /**************************************************************************
 202  *  IClassFactory_Constructor
 203  */
 204
 205 LPCLASSFACTORY IClassFactory_Constructor(REFCLSID rclsid)
 206 {
 207         IClassFactoryImpl* lpclf;
 208
 209         lpclf= (IClassFactoryImpl*)HeapAlloc(GetProcessHeap(),0,sizeof(IClassFactoryImpl));
 210         lpclf->ref = 1;
 211         ICOM_VTBL(lpclf) = &clfvt;
 212         lpclf->rclsid = (CLSID*)rclsid;
 213
 214         TRACE("(%p)->()\n",lpclf);
 215         InterlockedIncrement(&shell32_ObjCount);
 216         return (LPCLASSFACTORY)lpclf;
 217 }
 218 /**************************************************************************
 219  *  IClassFactory_QueryInterface
 220  */
 221 static HRESULT WINAPI IClassFactory_fnQueryInterface(
 222   LPCLASSFACTORY iface, REFIID riid, LPVOID *ppvObj)
 223 {
 224         ICOM_THIS(IClassFactoryImpl,iface);
 225         TRACE("(%p)->(\n\tIID:\t%s)\n",This,debugstr_guid(riid));
 226
 227         *ppvObj = NULL;
 228
 229         if(IsEqualIID(riid, &IID_IUnknown))          /*IUnknown*/
 230         { *ppvObj = This;
 231         }
 232         else if(IsEqualIID(riid, &IID_IClassFactory))  /*IClassFactory*/
 233         { *ppvObj = (IClassFactory*)This;
 234         }
 235
 236         if(*ppvObj)
 237         { IUnknown_AddRef((LPUNKNOWN)*ppvObj);
 238           TRACE("-- Interface: (%p)->(%p)\n",ppvObj,*ppvObj);
 239           return S_OK;
 240         }
 241         TRACE("-- Interface: %s E_NOINTERFACE\n", debugstr_guid(riid));
 242         return E_NOINTERFACE;
 243 }
 244 /******************************************************************************
 245  * IClassFactory_AddRef
 246  */
 247 static ULONG WINAPI IClassFactory_fnAddRef(LPCLASSFACTORY iface)
 248 {
 249         ICOM_THIS(IClassFactoryImpl,iface);
 250         TRACE("(%p)->(count=%lu)\n",This,This->ref);
 251
 252         InterlockedIncrement(&shell32_ObjCount);
 253         return InterlockedIncrement(&This->ref);
 254 }
 255 /******************************************************************************
 256  * IClassFactory_Release
 257  */
 258 static ULONG WINAPI IClassFactory_fnRelease(LPCLASSFACTORY iface)
 259 {
 260         ICOM_THIS(IClassFactoryImpl,iface);
 261         TRACE("(%p)->(count=%lu)\n",This,This->ref);
 262
 263         InterlockedDecrement(&shell32_ObjCount);
 264         if (!InterlockedDecrement(&This->ref))
 265         {
 266           TRACE("-- destroying IClassFactory(%p)\n",This);
 267           HeapFree(GetProcessHeap(),0,This);
 268           return 0;
 269         }
 270         return This->ref;
 271 }
 272 /******************************************************************************
 273  * IClassFactory_CreateInstance
 274  */
 275 static HRESULT WINAPI IClassFactory_fnCreateInstance(
 276   LPCLASSFACTORY iface, LPUNKNOWN pUnknown, REFIID riid, LPVOID *ppObject)
 277 {
 278         ICOM_THIS(IClassFactoryImpl,iface);
 279         IUnknown *pObj = NULL;
 280         HRESULT hres;
 281
 282         TRACE("%p->(%p,\n\tIID:\t%s,%p)\n",This,pUnknown,debugstr_guid(riid),ppObject);
 283
 284         *ppObject = NULL;
 285
 286         if(pUnknown)
 287         {
 288           return(CLASS_E_NOAGGREGATION);
 289         }
 290
 291         if (IsEqualCLSID(This->rclsid, &CLSID_ShellDesktop))
 292         {
 293           pObj = (IUnknown *)ISF_Desktop_Constructor();
 294         }
 295         else if (IsEqualCLSID(This->rclsid, &CLSID_ShellLink))
 296         {
 297           pObj = (IUnknown *)IShellLink_Constructor(FALSE);
 298         }
 299         else
 300         {
 301           ERR("unknown IID requested\n\tIID:\t%s\n",debugstr_guid(riid));
 302           return(E_NOINTERFACE);
 303         }
 304
 305         if (!pObj)
 306         {
 307           return(E_OUTOFMEMORY);
 308         }
 309
 310         hres = IUnknown_QueryInterface(pObj,riid, ppObject);
 311         IUnknown_Release(pObj);
 312
 313         TRACE("-- Object created: (%p)->%p\n",This,*ppObject);
 314
 315         return hres;
 316 }
 317 /******************************************************************************
 318  * IClassFactory_LockServer
 319  */
 320 static HRESULT WINAPI IClassFactory_fnLockServer(LPCLASSFACTORY iface, BOOL fLock)
 321 {
 322         ICOM_THIS(IClassFactoryImpl,iface);
 323         TRACE("%p->(0x%x), not implemented\n",This, fLock);
 324         return E_NOTIMPL;
 325 }
 326
 327 static ICOM_VTABLE(IClassFactory) clfvt =
 328 {
 329     ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
 330     IClassFactory_fnQueryInterface,
 331     IClassFactory_fnAddRef,
 332   IClassFactory_fnRelease,
 333   IClassFactory_fnCreateInstance,
 334   IClassFactory_fnLockServer
 335 };
 336
 337 /**************************************************************************
 338  * Default ClassFactory Implementation
 339  *
 340  * SHCreateDefClassObject
 341  *
 342  * NOTES
 343  *  helper function for dll's without a own classfactory
 344  *  a generic classfactory is returned
 345  *  when the CreateInstance of the cf is called the callback is executed
 346  */
 347 typedef HRESULT CALLBACK (*LPFNCREATEINSTANCE)(IUnknown* pUnkOuter, REFIID riid, LPVOID* ppvObject);
 348
 349 typedef struct
 350 {
 351     ICOM_VFIELD(IClassFactory);
 352     DWORD                       ref;
 353     CLSID                       *rclsid;
 354     LPFNCREATEINSTANCE          lpfnCI;
 355     const IID *                 riidInst;
 356     ULONG *                     pcRefDll; /* pointer to refcounter in external dll (ugrrr...) */
 357 } IDefClFImpl;
 358
 359 static ICOM_VTABLE(IClassFactory) dclfvt;
 360
 361 /**************************************************************************
 362  *  IDefClF_fnConstructor
 363  */
 364
 365 IClassFactory * IDefClF_fnConstructor(LPFNCREATEINSTANCE lpfnCI, PLONG pcRefDll, REFIID riidInst)
 366 {
 367         IDefClFImpl* lpclf;
 368
 369         lpclf = (IDefClFImpl*)HeapAlloc(GetProcessHeap(),0,sizeof(IDefClFImpl));
 370         lpclf->ref = 1;
 371         ICOM_VTBL(lpclf) = &dclfvt;
 372         lpclf->lpfnCI = lpfnCI;
 373         lpclf->pcRefDll = pcRefDll;
 374
 375         if (pcRefDll) InterlockedIncrement(pcRefDll);
 376         lpclf->riidInst = riidInst;
 377
 378         TRACE("(%p)\n\tIID:\t%s\n",lpclf, debugstr_guid(riidInst));
 379         InterlockedIncrement(&shell32_ObjCount);
 380         return (LPCLASSFACTORY)lpclf;
 381 }
 382 /**************************************************************************
 383  *  IDefClF_fnQueryInterface
 384  */
 385 static HRESULT WINAPI IDefClF_fnQueryInterface(
 386   LPCLASSFACTORY iface, REFIID riid, LPVOID *ppvObj)
 387 {
 388         ICOM_THIS(IDefClFImpl,iface);
 389
 390         TRACE("(%p)->(\n\tIID:\t%s)\n",This,debugstr_guid(riid));
 391
 392         *ppvObj = NULL;
 393
 394         if(IsEqualIID(riid, &IID_IUnknown))          /*IUnknown*/
 395         { *ppvObj = This;
 396         }
 397         else if(IsEqualIID(riid, &IID_IClassFactory))  /*IClassFactory*/
 398         { *ppvObj = (IClassFactory*)This;
 399         }
 400
 401         if(*ppvObj)
 402         { IUnknown_AddRef((LPUNKNOWN)*ppvObj);
 403           TRACE("-- Interface: (%p)->(%p)\n",ppvObj,*ppvObj);
 404           return S_OK;
 405         }
 406         TRACE("-- Interface: %s E_NOINTERFACE\n", debugstr_guid(riid));
 407         return E_NOINTERFACE;
 408 }
 409 /******************************************************************************
 410  * IDefClF_fnAddRef
 411  */
 412 static ULONG WINAPI IDefClF_fnAddRef(LPCLASSFACTORY iface)
 413 {
 414         ICOM_THIS(IDefClFImpl,iface);
 415         TRACE("(%p)->(count=%lu)\n",This,This->ref);
 416
 417         InterlockedIncrement(&shell32_ObjCount);
 418         return InterlockedIncrement(&This->ref);
 419 }
 420 /******************************************************************************
 421  * IDefClF_fnRelease
 422  */
 423 static ULONG WINAPI IDefClF_fnRelease(LPCLASSFACTORY iface)
 424 {
 425         ICOM_THIS(IDefClFImpl,iface);
 426         TRACE("(%p)->(count=%lu)\n",This,This->ref);
 427
 428         InterlockedDecrement(&shell32_ObjCount);
 429
 430         if (!InterlockedDecrement(&This->ref))
 431         {
 432           if (This->pcRefDll) InterlockedDecrement(This->pcRefDll);
 433
 434           TRACE("-- destroying IClassFactory(%p)\n",This);
 435           HeapFree(GetProcessHeap(),0,This);
 436           return 0;
 437         }
 438         return This->ref;
 439 }
 440 /******************************************************************************
 441  * IDefClF_fnCreateInstance
 442  */
 443 static HRESULT WINAPI IDefClF_fnCreateInstance(
 444   LPCLASSFACTORY iface, LPUNKNOWN pUnkOuter, REFIID riid, LPVOID *ppvObject)
 445 {
 446         ICOM_THIS(IDefClFImpl,iface);
 447
 448         TRACE("%p->(%p,\n\tIID:\t%s,%p)\n",This,pUnkOuter,debugstr_guid(riid),ppvObject);
 449
 450         *ppvObject = NULL;
 451
 452         if(pUnkOuter)
 453           return(CLASS_E_NOAGGREGATION);
 454
 455         if ( This->riidInst==NULL ||
 456              IsEqualCLSID(riid, This->riidInst) ||
 457              IsEqualCLSID(riid, &IID_IUnknown) )
 458         {
 459           return This->lpfnCI(pUnkOuter, riid, ppvObject);
 460         }
 461
 462         ERR("unknown IID requested\n\tIID:\t%s\n",debugstr_guid(riid));
 463         return E_NOINTERFACE;
 464 }
 465 /******************************************************************************
 466  * IDefClF_fnLockServer
 467  */
 468 static HRESULT WINAPI IDefClF_fnLockServer(LPCLASSFACTORY iface, BOOL fLock)
 469 {
 470         ICOM_THIS(IDefClFImpl,iface);
 471         TRACE("%p->(0x%x), not implemented\n",This, fLock);
 472         return E_NOTIMPL;
 473 }
 474
 475 static ICOM_VTABLE(IClassFactory) dclfvt =
 476 {
 477     ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
 478     IDefClF_fnQueryInterface,
 479     IDefClF_fnAddRef,
 480   IDefClF_fnRelease,
 481   IDefClF_fnCreateInstance,
 482   IDefClF_fnLockServer
 483 };
 484
 485 /******************************************************************************
 486  * SHCreateDefClassObject                       [SHELL32.70]
 487  */
 488 HRESULT WINAPI SHCreateDefClassObject(
 489         REFIID  riid,
 490         LPVOID* ppv,
 491         LPFNCREATEINSTANCE lpfnCI,      /* [in] create instance callback entry */
 492         PLONG   pcRefDll,               /* [in/out] ref count of the dll */
 493         REFIID  riidInst)               /* [in] optional interface to the instance */
 494 {
 495         TRACE("\n\tIID:\t%s %p %p %p \n\tIIDIns:\t%s\n",
 496               debugstr_guid(riid), ppv, lpfnCI, pcRefDll, debugstr_guid(riidInst));
 497
 498         if ( IsEqualCLSID(riid, &IID_IClassFactory) )
 499         {
 500           IClassFactory * pcf = IDefClF_fnConstructor(lpfnCI, pcRefDll, riidInst);
 501           if (pcf)
 502           {
 503             *ppv = pcf;
 504             return NOERROR;
 505           }
 506           return E_OUTOFMEMORY;
 507         }
 508         return E_NOINTERFACE;
 509 }
 510
 511 /*************************************************************************
 512  *  DragAcceptFiles             [SHELL32.54]
 513  */
 514 void WINAPI DragAcceptFiles(HWND hWnd, BOOL b)
 515 {
 516         LONG exstyle;
 517
 518         if( !IsWindow(hWnd) ) return;
 519         exstyle = GetWindowLongA(hWnd,GWL_EXSTYLE);
 520         if (b)
 521           exstyle |= WS_EX_ACCEPTFILES;
 522         else
 523           exstyle &= ~WS_EX_ACCEPTFILES;
 524         SetWindowLongA(hWnd,GWL_EXSTYLE,exstyle);
 525 }
 526
 527 /*************************************************************************
 528  * DragFinish           [SHELL32.80]
 529  */
 530 void WINAPI DragFinish(HDROP h)
 531 {
 532         TRACE("\n");
 533         GlobalFree((HGLOBAL)h);
 534 }
 535
 536 /*************************************************************************
 537  * DragQueryPoint               [SHELL32.135]
 538  */
 539 BOOL WINAPI DragQueryPoint(HDROP hDrop, POINT *p)
 540 {
 541         DROPFILES *lpDropFileStruct;
 542         BOOL bRet;
 543
 544         TRACE("\n");
 545
 546         lpDropFileStruct = (DROPFILES *) GlobalLock(hDrop);
 547
 548         *p = lpDropFileStruct->pt;
 549         bRet = lpDropFileStruct->fNC;
 550
 551         GlobalUnlock(hDrop);
 552         return bRet;
 553 }
 554
 555 /*************************************************************************
 556  *  DragQueryFileA              [SHELL32.82] [shell32.82]
 557  */
 558 UINT WINAPI DragQueryFileA(
 559         HDROP hDrop,
 560         UINT lFile,
 561         LPSTR lpszFile,
 562         UINT lLength)
 563 {
 564         LPSTR lpDrop;
 565         UINT i = 0;
 566         DROPFILES *lpDropFileStruct = (DROPFILES *) GlobalLock(hDrop);
 567
 568         TRACE("(%08x, %x, %p, %u)\n",   hDrop,lFile,lpszFile,lLength);
 569
 570         if(!lpDropFileStruct) goto end;
 571
 572         lpDrop = (LPSTR) lpDropFileStruct + lpDropFileStruct->pFiles;
 573
 574         while (i++ < lFile)
 575         {
 576           while (*lpDrop++); /* skip filename */
 577           if (!*lpDrop)
 578           {
 579             i = (lFile == 0xFFFFFFFF) ? i : 0;
 580             goto end;
 581           }
 582         }
 583
 584         i = strlen(lpDrop);
 585         i++;
 586         if (!lpszFile ) goto end;   /* needed buffer size */
 587         i = (lLength > i) ? i : lLength;
 588         lstrcpynA (lpszFile,  lpDrop,  i);
 589 end:
 590         GlobalUnlock(hDrop);
 591         return i;
 592 }
 593
 594 /*************************************************************************
 595  *  DragQueryFileW              [shell32.133]
 596  */
 597 UINT WINAPI DragQueryFileW(
 598         HDROP hDrop,
 599         UINT lFile,
 600         LPWSTR lpszwFile,
 601         UINT lLength)
 602 {
 603         LPWSTR lpwDrop;
 604         UINT i = 0;
 605         DROPFILES *lpDropFileStruct = (DROPFILES *) GlobalLock(hDrop);
 606
 607         TRACE("(%08x, %x, %p, %u)\n", hDrop,lFile,lpszwFile,lLength);
 608
 609         if(!lpDropFileStruct) goto end;
 610
 611         lpwDrop = (LPWSTR) lpDropFileStruct + lpDropFileStruct->pFiles;
 612
 613         i = 0;
 614         while (i++ < lFile)
 615         {
 616           while (*lpwDrop++); /* skip filename */
 617           if (!*lpwDrop)
 618           {
 619             i = (lFile == 0xFFFFFFFF) ? i : 0;
 620             goto end;
 621           }
 622         }
 623
 624         i = strlenW(lpwDrop);
 625         i++;
 626         if ( !lpszwFile) goto end;   /* needed buffer size */
 627
 628         i = (lLength > i) ? i : lLength;
 629         lstrcpynW (lpszwFile, lpwDrop, i);
 630 end:
 631         GlobalUnlock(hDrop);
 632         return i;
 633 }