dlls/oleaut32/oleaut.c

   1 /*
   2  *      OLEAUT32
   3  *
   4  * Copyright 1999, 2000 Marcus Meissner
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include <stdarg.h>
  22 #include <string.h>
  23
  24 #define COBJMACROS
  25
  26 #include "windef.h"
  27 #include "winbase.h"
  28 #include "wingdi.h"
  29 #include "winuser.h"
  30 #include "winerror.h"
  31
  32 #include "ole2.h"
  33 #include "olectl.h"
  34 #include "oleauto.h"
  35
  36 #include "tmarshal.h"
  37
  38 #include "wine/debug.h"
  39
  40 WINE_DEFAULT_DEBUG_CHANNEL(ole);
  41
  42 /* The OLE Automation ProxyStub Interface Class (aka Typelib Marshaler) */
  43 extern const GUID CLSID_PSOAInterface;
  44
  45 /* IDispatch marshaler */
  46 extern const GUID CLSID_PSDispatch;
  47
  48 static BOOL BSTR_bCache = TRUE; /* Cache allocations to minimise alloc calls? */
  49
  50 HMODULE OLEAUT32_hModule = NULL;
  51
  52 /******************************************************************************
  53  * BSTR  {OLEAUT32}
  54  *
  55  * NOTES
  56  *  BSTR is a simple typedef for a wide-character string used as the principle
  57  *  string type in ole automation. When encapsulated in a Variant type they are
  58  *  automatically copied and destroyed as the variant is processed.
  59  *
  60  *  The low level BSTR Api allows manipulation of these strings and is used by
  61  *  higher level Api calls to manage the strings transparently to the caller.
  62  *
  63  *  Internally the BSTR type is allocated with space for a DWORD byte count before
  64  *  the string data begins. This is undocumented and non-system code should not
  65  *  access the count directly. Use SysStringLen() or SysStringByteLen()
  66  *  instead. Note that the byte count does not include the terminating NUL.
  67  *
  68  *  To create a new BSTR, use SysAllocString(), SysAllocStringLen() or
  69  *  SysAllocStringByteLen(). To change the size of an existing BSTR, use SysReAllocString()
  70  *  or SysReAllocStringLen(). Finally to destroy a string use SysFreeString().
  71  *
  72  *  BSTR's are cached by Ole Automation by default. To override this behaviour
  73  *  either set the environment variable 'OANOCACHE', or call SetOaNoCache().
  74  *
  75  * SEE ALSO
  76  *  'Inside OLE, second edition' by Kraig Brockshmidt.
  77  */
  78
  79 /******************************************************************************
  80  *             SysStringLen  [OLEAUT32.7]
  81  *
  82  * Get the allocated length of a BSTR in wide characters.
  83  *
  84  * PARAMS
  85  *  str [I] BSTR to find the length of
  86  *
  87  * RETURNS
  88  *  The allocated length of str, or 0 if str is NULL.
  89  *
  90  * NOTES
  91  *  See BSTR.
  92  *  The returned length may be different from the length of the string as
  93  *  calculated by lstrlenW(), since it returns the length that was used to
  94  *  allocate the string by SysAllocStringLen().
  95  */
  96 UINT WINAPI SysStringLen(BSTR str)
  97 {
  98     DWORD* bufferPointer;
  99
 100      if (!str) return 0;
 101     /*
 102      * The length of the string (in bytes) is contained in a DWORD placed
 103      * just before the BSTR pointer
 104      */
 105     bufferPointer = (DWORD*)str;
 106
 107     bufferPointer--;
 108
 109     return (int)(*bufferPointer/sizeof(WCHAR));
 110 }
 111
 112 /******************************************************************************
 113  *             SysStringByteLen  [OLEAUT32.149]
 114  *
 115  * Get the allocated length of a BSTR in bytes.
 116  *
 117  * PARAMS
 118  *  str [I] BSTR to find the length of
 119  *
 120  * RETURNS
 121  *  The allocated length of str, or 0 if str is NULL.
 122  *
 123  * NOTES
 124  *  See SysStringLen(), BSTR().
 125  */
 126 UINT WINAPI SysStringByteLen(BSTR str)
 127 {
 128     DWORD* bufferPointer;
 129
 130      if (!str) return 0;
 131     /*
 132      * The length of the string (in bytes) is contained in a DWORD placed
 133      * just before the BSTR pointer
 134      */
 135     bufferPointer = (DWORD*)str;
 136
 137     bufferPointer--;
 138
 139     return (int)(*bufferPointer);
 140 }
 141
 142 /******************************************************************************
 143  *              SysAllocString  [OLEAUT32.2]
 144  *
 145  * Create a BSTR from an OLESTR.
 146  *
 147  * PARAMS
 148  *  str [I] Source to create BSTR from
 149  *
 150  * RETURNS
 151  *  Success: A BSTR allocated with SysAllocStringLen().
 152  *  Failure: NULL, if oleStr is NULL.
 153  *
 154  * NOTES
 155  *  See BSTR.
 156  *  MSDN (October 2001) incorrectly states that NULL is returned if oleStr has
 157  *  a length of 0. Native Win32 and this implementation both return a valid
 158  *  empty BSTR in this case.
 159  */
 160 BSTR WINAPI SysAllocString(LPCOLESTR str)
 161 {
 162     if (!str) return 0;
 163
 164     /* Delegate this to the SysAllocStringLen32 method. */
 165     return SysAllocStringLen(str, lstrlenW(str));
 166 }
 167
 168 /******************************************************************************
 169  *              SysFreeString   [OLEAUT32.6]
 170  *
 171  * Free a BSTR.
 172  *
 173  * PARAMS
 174  *  str [I] BSTR to free.
 175  *
 176  * RETURNS
 177  *  Nothing.
 178  *
 179  * NOTES
 180  *  See BSTR.
 181  *  str may be NULL, in which case this function does nothing.
 182  */
 183 void WINAPI SysFreeString(BSTR str)
 184 {
 185     DWORD* bufferPointer;
 186
 187     /* NULL is a valid parameter */
 188     if(!str) return;
 189
 190     /*
 191      * We have to be careful when we free a BSTR pointer, it points to
 192      * the beginning of the string but it skips the byte count contained
 193      * before the string.
 194      */
 195     bufferPointer = (DWORD*)str;
 196
 197     bufferPointer--;
 198
 199     /*
 200      * Free the memory from its "real" origin.
 201      */
 202     HeapFree(GetProcessHeap(), 0, bufferPointer);
 203 }
 204
 205 /******************************************************************************
 206  *             SysAllocStringLen     [OLEAUT32.4]
 207  *
 208  * Create a BSTR from an OLESTR of a given wide character length.
 209  *
 210  * PARAMS
 211  *  str [I] Source to create BSTR from
 212  *  len [I] Length of oleStr in wide characters
 213  *
 214  * RETURNS
 215  *  Success: A newly allocated BSTR from SysAllocStringByteLen()
 216  *  Failure: NULL, if len is >= 0x80000000, or memory allocation fails.
 217  *
 218  * NOTES
 219  *  See BSTR(), SysAllocStringByteLen().
 220  */
 221 BSTR WINAPI SysAllocStringLen(const OLECHAR *str, unsigned int len)
 222 {
 223     DWORD  bufferSize;
 224     DWORD* newBuffer;
 225     WCHAR* stringBuffer;
 226
 227     /*
 228      * Find the length of the buffer passed-in in bytes.
 229      */
 230     bufferSize = len * sizeof (WCHAR);
 231
 232     /*
 233      * Allocate a new buffer to hold the string.
 234      * don't forget to keep an empty spot at the beginning of the
 235      * buffer for the character count and an extra character at the
 236      * end for the NULL.
 237      */
 238     newBuffer = HeapAlloc(GetProcessHeap(), 0,
 239                           bufferSize + sizeof(WCHAR) + sizeof(DWORD));
 240
 241     /*
 242      * If the memory allocation failed, return a null pointer.
 243      */
 244     if (newBuffer==0)
 245       return 0;
 246
 247     /*
 248      * Copy the length of the string in the placeholder.
 249      */
 250     *newBuffer = bufferSize;
 251
 252     /*
 253      * Skip the byte count.
 254      */
 255     newBuffer++;
 256
 257     /*
 258      * Copy the information in the buffer.
 259      * Since it is valid to pass a NULL pointer here, we'll initialize the
 260      * buffer to nul if it is the case.
 261      */
 262     if (str != 0)
 263       memcpy(newBuffer, str, bufferSize);
 264     else
 265       memset(newBuffer, 0, bufferSize);
 266
 267     /*
 268      * Make sure that there is a nul character at the end of the
 269      * string.
 270      */
 271     stringBuffer = (WCHAR*)newBuffer;
 272     stringBuffer[len] = L'\0';
 273
 274     return (LPWSTR)stringBuffer;
 275 }
 276
 277 /******************************************************************************
 278  *             SysReAllocStringLen   [OLEAUT32.5]
 279  *
 280  * Change the length of a previously created BSTR.
 281  *
 282  * PARAMS
 283  *  old [O] BSTR to change the length of
 284  *  str [I] New source for pbstr
 285  *  len [I] Length of oleStr in wide characters
 286  *
 287  * RETURNS
 288  *  Success: 1. The size of pbstr is updated.
 289  *  Failure: 0, if len >= 0x80000000 or memory allocation fails.
 290  *
 291  * NOTES
 292  *  See BSTR(), SysAllocStringByteLen().
 293  *  *pbstr may be changed by this function.
 294  */
 295 int WINAPI SysReAllocStringLen(BSTR* old, const OLECHAR* str, unsigned int len)
 296 {
 297     if (*old!=NULL) {
 298       DWORD newbytelen = len*sizeof(WCHAR);
 299       DWORD *ptr = HeapReAlloc(GetProcessHeap(),0,((DWORD*)*old)-1,newbytelen+sizeof(WCHAR)+sizeof(DWORD));
 300       *old = (BSTR)(ptr+1);
 301       *ptr = newbytelen;
 302       if (str) {
 303         memcpy(*old, str, newbytelen);
 304         (*old)[len] = 0;
 305       } else {
 306         /* Subtle hidden feature: The old string data is still there
 307          * when 'in' is NULL!
 308          * Some Microsoft program needs it.
 309          */
 310       }
 311     } else {
 312       /*
 313        * Allocate the new string
 314        */
 315       *old = SysAllocStringLen(str, len);
 316     }
 317
 318     return 1;
 319 }
 320
 321 /******************************************************************************
 322  *             SysAllocStringByteLen     [OLEAUT32.150]
 323  *
 324  * Create a BSTR from an OLESTR of a given byte length.
 325  *
 326  * PARAMS
 327  *  str [I] Source to create BSTR from
 328  *  len [I] Length of oleStr in bytes
 329  *
 330  * RETURNS
 331  *  Success: A newly allocated BSTR
 332  *  Failure: NULL, if len is >= 0x80000000, or memory allocation fails.
 333  *
 334  * NOTES
 335  *  -If len is 0 or oleStr is NULL the resulting string is empty ("").
 336  *  -This function always NUL terminates the resulting BSTR.
 337  *  -oleStr may be either an LPCSTR or LPCOLESTR, since it is copied
 338  *  without checking for a terminating NUL.
 339  *  See BSTR.
 340  */
 341 BSTR WINAPI SysAllocStringByteLen(LPCSTR str, UINT len)
 342 {
 343     DWORD* newBuffer;
 344     char* stringBuffer;
 345
 346     /*
 347      * Allocate a new buffer to hold the string.
 348      * don't forget to keep an empty spot at the beginning of the
 349      * buffer for the character count and an extra character at the
 350      * end for the NULL.
 351      */
 352     newBuffer = HeapAlloc(GetProcessHeap(), 0,
 353                           len + sizeof(WCHAR) + sizeof(DWORD));
 354
 355     /*
 356      * If the memory allocation failed, return a null pointer.
 357      */
 358     if (newBuffer==0)
 359       return 0;
 360
 361     /*
 362      * Copy the length of the string in the placeholder.
 363      */
 364     *newBuffer = len;
 365
 366     /*
 367      * Skip the byte count.
 368      */
 369     newBuffer++;
 370
 371     /*
 372      * Copy the information in the buffer.
 373      * Since it is valid to pass a NULL pointer here, we'll initialize the
 374      * buffer to nul if it is the case.
 375      */
 376     if (str != 0)
 377       memcpy(newBuffer, str, len);
 378
 379     /*
 380      * Make sure that there is a nul character at the end of the
 381      * string.
 382      */
 383     stringBuffer = (char *)newBuffer;
 384     stringBuffer[len] = 0;
 385     stringBuffer[len+1] = 0;
 386
 387     return (LPWSTR)stringBuffer;
 388 }
 389
 390 /******************************************************************************
 391  *              SysReAllocString        [OLEAUT32.3]
 392  *
 393  * Change the length of a previously created BSTR.
 394  *
 395  * PARAMS
 396  *  old [I/O] BSTR to change the length of
 397  *  str [I]   New source for pbstr
 398  *
 399  * RETURNS
 400  *  Success: 1
 401  *  Failure: 0.
 402  *
 403  * NOTES
 404  *  See BSTR(), SysAllocStringStringLen().
 405  */
 406 INT WINAPI SysReAllocString(LPBSTR old,LPCOLESTR str)
 407 {
 408     /*
 409      * Sanity check
 410      */
 411     if (old==NULL)
 412       return 0;
 413
 414     /*
 415      * Make sure we free the old string.
 416      */
 417     if (*old!=NULL)
 418       SysFreeString(*old);
 419
 420     /*
 421      * Allocate the new string
 422      */
 423     *old = SysAllocString(str);
 424
 425      return 1;
 426 }
 427
 428 /******************************************************************************
 429  *              SetOaNoCache (OLEAUT32.327)
 430  *
 431  * Instruct Ole Automation not to cache BSTR allocations.
 432  *
 433  * PARAMS
 434  *  None.
 435  *
 436  * RETURNS
 437  *  Nothing.
 438  *
 439  * NOTES
 440  *  See BSTR.
 441  */
 442 void WINAPI SetOaNoCache(void)
 443 {
 444   BSTR_bCache = FALSE;
 445 }
 446
 447 static WCHAR    _delimiter[2] = {'!',0}; /* default delimiter apparently */
 448 static WCHAR    *pdelimiter = &_delimiter[0];
 449
 450 /***********************************************************************
 451  *              RegisterActiveObject (OLEAUT32.33)
 452  */
 453 HRESULT WINAPI RegisterActiveObject(
 454         LPUNKNOWN punk,REFCLSID rcid,DWORD dwFlags,LPDWORD pdwRegister
 455 ) {
 456         WCHAR                   guidbuf[80];
 457         HRESULT                 ret;
 458         LPRUNNINGOBJECTTABLE    runobtable;
 459         LPMONIKER               moniker;
 460
 461         StringFromGUID2(rcid,guidbuf,39);
 462         ret = CreateItemMoniker(pdelimiter,guidbuf,&moniker);
 463         if (FAILED(ret))
 464                 return ret;
 465         ret = GetRunningObjectTable(0,&runobtable);
 466         if (FAILED(ret)) {
 467                 IMoniker_Release(moniker);
 468                 return ret;
 469         }
 470         ret = IRunningObjectTable_Register(runobtable,dwFlags,punk,moniker,pdwRegister);
 471         IRunningObjectTable_Release(runobtable);
 472         IMoniker_Release(moniker);
 473         return ret;
 474 }
 475
 476 /***********************************************************************
 477  *              RevokeActiveObject (OLEAUT32.34)
 478  */
 479 HRESULT WINAPI RevokeActiveObject(DWORD xregister,LPVOID reserved)
 480 {
 481         LPRUNNINGOBJECTTABLE    runobtable;
 482         HRESULT                 ret;
 483
 484         ret = GetRunningObjectTable(0,&runobtable);
 485         if (FAILED(ret)) return ret;
 486         ret = IRunningObjectTable_Revoke(runobtable,xregister);
 487         if (SUCCEEDED(ret)) ret = S_OK;
 488         IRunningObjectTable_Release(runobtable);
 489         return ret;
 490 }
 491
 492 /***********************************************************************
 493  *              GetActiveObject (OLEAUT32.35)
 494  */
 495 HRESULT WINAPI GetActiveObject(REFCLSID rcid,LPVOID preserved,LPUNKNOWN *ppunk)
 496 {
 497         WCHAR                   guidbuf[80];
 498         HRESULT                 ret;
 499         LPRUNNINGOBJECTTABLE    runobtable;
 500         LPMONIKER               moniker;
 501
 502         StringFromGUID2(rcid,guidbuf,39);
 503         ret = CreateItemMoniker(pdelimiter,guidbuf,&moniker);
 504         if (FAILED(ret))
 505                 return ret;
 506         ret = GetRunningObjectTable(0,&runobtable);
 507         if (FAILED(ret)) {
 508                 IMoniker_Release(moniker);
 509                 return ret;
 510         }
 511         ret = IRunningObjectTable_GetObject(runobtable,moniker,ppunk);
 512         IRunningObjectTable_Release(runobtable);
 513         IMoniker_Release(moniker);
 514         return ret;
 515 }
 516
 517
 518 /***********************************************************************
 519  *           OaBuildVersion           [OLEAUT32.170]
 520  *
 521  * Get the Ole Automation build version.
 522  *
 523  * PARAMS
 524  *  None
 525  *
 526  * RETURNS
 527  *  The build version.
 528  *
 529  * NOTES
 530  *  Known oleaut32.dll versions:
 531  *| OLE Ver.  Comments                   Date     Build Ver.
 532  *| --------  -------------------------  ----     ---------
 533  *| OLE 2.1   NT                         1993-95  10 3023
 534  *| OLE 2.1                                       10 3027
 535  *| Win32s    Ver 1.1e                            20 4049
 536  *| OLE 2.20  W95/NT                     1993-96  20 4112
 537  *| OLE 2.20  W95/NT                     1993-96  20 4118
 538  *| OLE 2.20  W95/NT                     1993-96  20 4122
 539  *| OLE 2.30  W95/NT                     1993-98  30 4265
 540  *| OLE 2.40  NT??                       1993-98  40 4267
 541  *| OLE 2.40  W98 SE orig. file          1993-98  40 4275
 542  *| OLE 2.40  W2K orig. file             1993-XX  40 4514
 543  *
 544  * Currently the versions returned are 2.20 for Win3.1, 2.30 for Win95 & NT 3.51,
 545  * and 2.40 for all later versions. The build number is maximum, i.e. 0xffff.
 546  */
 547 ULONG WINAPI OaBuildVersion()
 548 {
 549     switch(GetVersion() & 0x8000ffff)  /* mask off build number */
 550     {
 551     case 0x80000a03:  /* WIN31 */
 552                 return MAKELONG(0xffff, 20);
 553     case 0x00003303:  /* NT351 */
 554                 return MAKELONG(0xffff, 30);
 555     case 0x80000004:  /* WIN95; I'd like to use the "standard" w95 minor
 556                          version here (30), but as we still use w95
 557                          as default winver (which is good IMHO), I better
 558                          play safe and use the latest value for w95 for now.
 559                          Change this as soon as default winver gets changed
 560                          to something more recent */
 561     case 0x80000a04:  /* WIN98 */
 562     case 0x00000004:  /* NT40 */
 563     case 0x00000005:  /* W2K */
 564     case 0x00000105:  /* WinXP */
 565                 return MAKELONG(0xffff, 40);
 566     default:
 567                 FIXME("Version value not known yet. Please investigate it !\n");
 568                 return MAKELONG(0xffff, 40);  /* for now return the same value as for w2k */
 569     }
 570 }
 571
 572 /******************************************************************************
 573  *              OleTranslateColor       [OLEAUT32.421]
 574  *
 575  * Convert an OLE_COLOR to a COLORREF.
 576  *
 577  * PARAMS
 578  *  clr       [I] Color to convert
 579  *  hpal      [I] Handle to a palette for the conversion
 580  *  pColorRef [O] Destination for converted color, or NULL to test if the conversion is ok
 581  *
 582  * RETURNS
 583  *  Success: S_OK. The conversion is ok, and pColorRef contains the converted color if non-NULL.
 584  *  Failure: E_INVALIDARG, if any argument is invalid.
 585  *
 586  * FIXME
 587  *  Document the conversion rules.
 588  */
 589 HRESULT WINAPI OleTranslateColor(
 590   OLE_COLOR clr,
 591   HPALETTE  hpal,
 592   COLORREF* pColorRef)
 593 {
 594   COLORREF colorref;
 595   BYTE b = HIBYTE(HIWORD(clr));
 596
 597   TRACE("(%08lx, %p, %p):stub\n", clr, hpal, pColorRef);
 598
 599   /*
 600    * In case pColorRef is NULL, provide our own to simplify the code.
 601    */
 602   if (pColorRef == NULL)
 603     pColorRef = &colorref;
 604
 605   switch (b)
 606   {
 607     case 0x00:
 608     {
 609       if (hpal != 0)
 610         *pColorRef =  PALETTERGB(GetRValue(clr),
 611                                  GetGValue(clr),
 612                                  GetBValue(clr));
 613       else
 614         *pColorRef = clr;
 615
 616       break;
 617     }
 618
 619     case 0x01:
 620     {
 621       if (hpal != 0)
 622       {
 623         PALETTEENTRY pe;
 624         /*
 625          * Validate the palette index.
 626          */
 627         if (GetPaletteEntries(hpal, LOWORD(clr), 1, &pe) == 0)
 628           return E_INVALIDARG;
 629       }
 630
 631       *pColorRef = clr;
 632
 633       break;
 634     }
 635
 636     case 0x02:
 637       *pColorRef = clr;
 638       break;
 639
 640     case 0x80:
 641     {
 642       int index = LOBYTE(LOWORD(clr));
 643
 644       /*
 645        * Validate GetSysColor index.
 646        */
 647       if ((index < COLOR_SCROLLBAR) || (index > COLOR_MENUBAR))
 648         return E_INVALIDARG;
 649
 650       *pColorRef =  GetSysColor(index);
 651
 652       break;
 653     }
 654
 655     default:
 656       return E_INVALIDARG;
 657   }
 658
 659   return S_OK;
 660 }
 661
 662 extern HRESULT OLEAUTPS_DllGetClassObject(REFCLSID rclsid, REFIID riid, LPVOID *ppv);
 663
 664 extern void _get_STDFONT_CF(LPVOID);
 665 extern void _get_STDPIC_CF(LPVOID);
 666
 667 /***********************************************************************
 668  *              DllGetClassObject (OLEAUT32.1)
 669  */
 670 HRESULT WINAPI OLEAUT32_DllGetClassObject(REFCLSID rclsid, REFIID iid, LPVOID *ppv)
 671 {
 672     *ppv = NULL;
 673     if (IsEqualGUID(rclsid,&CLSID_StdFont)) {
 674         if (IsEqualGUID(iid,&IID_IClassFactory)) {
 675             _get_STDFONT_CF(ppv);
 676             IClassFactory_AddRef((IClassFactory*)*ppv);
 677             return S_OK;
 678         }
 679     }
 680     if (IsEqualGUID(rclsid,&CLSID_StdPicture)) {
 681         if (IsEqualGUID(iid,&IID_IClassFactory)) {
 682             _get_STDPIC_CF(ppv);
 683             IClassFactory_AddRef((IClassFactory*)*ppv);
 684             return S_OK;
 685         }
 686     }
 687     if (IsEqualGUID(rclsid,&CLSID_PSDispatch)) {
 688         return OLEAUTPS_DllGetClassObject(rclsid,iid,ppv);
 689     }
 690     if (IsEqualGUID(rclsid,&CLSID_PSOAInterface)) {
 691         if (S_OK==TypeLibFac_DllGetClassObject(rclsid,iid,ppv))
 692             return S_OK;
 693         /*FALLTHROUGH*/
 694     }
 695     FIXME("\n\tCLSID:\t%s,\n\tIID:\t%s\n",debugstr_guid(rclsid),debugstr_guid(iid));
 696     return CLASS_E_CLASSNOTAVAILABLE;
 697 }
 698
 699 /***********************************************************************
 700  *              DllCanUnloadNow (OLEAUT32.410)
 701  *
 702  * Determine if this dll can be unloaded from the callers address space.
 703  *
 704  * PARAMS
 705  *  None.
 706  *
 707  * RETURNS
 708  *  Always returns S_FALSE. This dll cannot be unloaded.
 709  */
 710 HRESULT WINAPI OLEAUT32_DllCanUnloadNow(void)
 711 {
 712     return S_FALSE;
 713 }
 714
 715 /*****************************************************************************
 716  *              DllMain         [OLEAUT32.@]
 717  */
 718 BOOL WINAPI DllMain(HINSTANCE hInstDll, DWORD fdwReason, LPVOID lpvReserved)
 719 {
 720   TRACE("(%p,%lu,%p)\n", hInstDll, fdwReason, lpvReserved);
 721
 722   switch (fdwReason) {
 723   case DLL_PROCESS_ATTACH:
 724     DisableThreadLibraryCalls(hInstDll);
 725     OLEAUT32_hModule = (HMODULE)hInstDll;
 726     break;
 727   case DLL_PROCESS_DETACH:
 728     break;
 729   };
 730
 731   return TRUE;
 732 }