windows/class.c

   1 /*
   2  * Window classes functions
   3  *
   4  * Copyright 1993, 1996 Alexandre Julliard
   5  *           1998 Juergen Schmied (jsch)
   6  *
   7  * FIXME: In win32 all classes are local. They are registered at
   8  *        program start. Processes CANNOT share classes. (Source: some
   9  *        win31->NT migration book)
  10  *
  11  * FIXME: There seems to be a general problem with hInstance in WINE
  12  *   classes are getting registred with wrong hInstance.
  13  */
  14
  15 #include <stdlib.h>
  16 #include <string.h>
  17 #include "wine/winbase16.h"
  18 #include "class.h"
  19 #include "heap.h"
  20 #include "win.h"
  21 #include "dce.h"
  22 #include "ldt.h"
  23 #include "toolhelp.h"
  24 #include "winproc.h"
  25 #include "debug.h"
  26 #include "winerror.h"
  27 #include "wine/winuser16.h"
  28
  29
  30 static CLASS *firstClass = NULL;
  31
  32
  33 /***********************************************************************
  34  *           CLASS_DumpClass
  35  *
  36  * Dump the content of a class structure to stderr.
  37  */
  38 void CLASS_DumpClass( CLASS *ptr )
  39 {
  40     char className[MAX_CLASSNAME+1];
  41     int i;
  42
  43     if (ptr->magic != CLASS_MAGIC)
  44     {
  45         DUMP("%p is not a class\n", ptr );
  46         return;
  47     }
  48
  49     GlobalGetAtomNameA( ptr->atomName, className, sizeof(className) );
  50
  51     DUMP( "Class %p:\n", ptr );
  52     DUMP( "next=%p  name=%04x '%s'  style=%08x  wndProc=%08x\n"
  53              "inst=%04x  dce=%08x  icon=%04x  cursor=%04x  bkgnd=%04x\n"
  54              "clsExtra=%d  winExtra=%d  #windows=%d\n",
  55              ptr->next, ptr->atomName, className, ptr->style,
  56              (UINT)ptr->winproc, ptr->hInstance, (UINT)ptr->dce,
  57              ptr->hIcon, ptr->hCursor, ptr->hbrBackground,
  58              ptr->cbClsExtra, ptr->cbWndExtra, ptr->cWindows );
  59     if (ptr->cbClsExtra)
  60     {
  61         DUMP( "extra bytes:" );
  62         for (i = 0; i < ptr->cbClsExtra; i++)
  63             DUMP( " %02x", *((BYTE *)ptr->wExtra+i) );
  64         DUMP( "\n" );
  65     }
  66     DUMP( "\n" );
  67 }
  68
  69
  70 /***********************************************************************
  71  *           CLASS_WalkClasses
  72  *
  73  * Walk the class list and print each class on stderr.
  74  */
  75 void CLASS_WalkClasses(void)
  76 {
  77     CLASS *ptr;
  78     char className[MAX_CLASSNAME+1];
  79
  80     DUMP( " Class   Name                  Style   WndProc\n" );
  81     for (ptr = firstClass; ptr; ptr = ptr->next)
  82     {
  83         GlobalGetAtomNameA( ptr->atomName, className, sizeof(className) );
  84         DUMP( "%08x %-20.20s %08x %08x\n", (UINT)ptr, className,
  85                  ptr->style, (UINT)ptr->winproc );
  86     }
  87     DUMP( "\n" );
  88 }
  89
  90
  91 /***********************************************************************
  92  *           CLASS_GetMenuNameA
  93  *
  94  * Get the menu name as a ASCII string.
  95  */
  96 static LPSTR CLASS_GetMenuNameA( CLASS *classPtr )
  97 {
  98     if (!classPtr->menuNameA && classPtr->menuNameW)
  99     {
 100         /* We need to copy the Unicode string */
 101         classPtr->menuNameA = SEGPTR_STRDUP_WtoA( classPtr->menuNameW );
 102     }
 103     return classPtr->menuNameA;
 104 }
 105
 106
 107 /***********************************************************************
 108  *           CLASS_GetMenuNameW
 109  *
 110  * Get the menu name as a Unicode string.
 111  */
 112 static LPWSTR CLASS_GetMenuNameW( CLASS *classPtr )
 113 {
 114     if (!classPtr->menuNameW && classPtr->menuNameA)
 115     {
 116         if (!HIWORD(classPtr->menuNameA))
 117             return (LPWSTR)classPtr->menuNameA;
 118         /* Now we need to copy the ASCII string */
 119         classPtr->menuNameW = HEAP_strdupAtoW( SystemHeap, 0,
 120                                                classPtr->menuNameA );
 121     }
 122     return classPtr->menuNameW;
 123 }
 124
 125
 126 /***********************************************************************
 127  *           CLASS_SetMenuNameA
 128  *
 129  * Set the menu name in a class structure by copying the string.
 130  */
 131 static void CLASS_SetMenuNameA( CLASS *classPtr, LPCSTR name )
 132 {
 133     if (HIWORD(classPtr->menuNameA)) SEGPTR_FREE( classPtr->menuNameA );
 134     if (classPtr->menuNameW) HeapFree( SystemHeap, 0, classPtr->menuNameW );
 135     classPtr->menuNameA = SEGPTR_STRDUP( name );
 136     classPtr->menuNameW = 0;
 137 }
 138
 139
 140 /***********************************************************************
 141  *           CLASS_SetMenuNameW
 142  *
 143  * Set the menu name in a class structure by copying the string.
 144  */
 145 static void CLASS_SetMenuNameW( CLASS *classPtr, LPCWSTR name )
 146 {
 147     if (!HIWORD(name))
 148     {
 149         CLASS_SetMenuNameA( classPtr, (LPCSTR)name );
 150         return;
 151     }
 152     if (HIWORD(classPtr->menuNameA)) SEGPTR_FREE( classPtr->menuNameA );
 153     if (classPtr->menuNameW) HeapFree( SystemHeap, 0, classPtr->menuNameW );
 154     if ((classPtr->menuNameW = HeapAlloc( SystemHeap, 0,
 155                                          (lstrlenW(name)+1)*sizeof(WCHAR) )))
 156         lstrcpyW( classPtr->menuNameW, name );
 157     classPtr->menuNameA = 0;
 158 }
 159
 160
 161 /***********************************************************************
 162  *           CLASS_GetClassNameA
 163  *
 164  * Get the clas name as a ASCII string.
 165  */
 166 static LPSTR CLASS_GetClassNameA( CLASS *classPtr )
 167 {
 168     if (!classPtr->classNameA && classPtr->classNameW)
 169     {
 170         /* We need to copy the Unicode string */
 171         classPtr->classNameA = SEGPTR_STRDUP_WtoA( classPtr->classNameW );
 172     }
 173     return classPtr->classNameA;
 174 }
 175
 176
 177 /***********************************************************************
 178  *           CLASS_GetClassNameW
 179  *
 180  * Get the class name as a Unicode string.
 181  */
 182 static LPWSTR CLASS_GetClassNameW( CLASS *classPtr )
 183 {
 184     if (!classPtr->classNameW && classPtr->classNameA)
 185     {
 186         if (!HIWORD(classPtr->classNameA))
 187             return (LPWSTR)classPtr->classNameA;
 188         /* Now we need to copy the ASCII string */
 189         classPtr->classNameW = HEAP_strdupAtoW( SystemHeap, 0,
 190                                                classPtr->classNameA );
 191     }
 192     return classPtr->classNameW;
 193 }
 194
 195 /***********************************************************************
 196  *           CLASS_SetClassNameA
 197  *
 198  * Set the class name in a class structure by copying the string.
 199  */
 200 static void CLASS_SetClassNameA( CLASS *classPtr, LPCSTR name )
 201 {
 202     if (HIWORD(classPtr->classNameA)) SEGPTR_FREE( classPtr->classNameA );
 203     if (classPtr->classNameW) HeapFree( SystemHeap, 0, classPtr->classNameW );
 204     classPtr->classNameA = SEGPTR_STRDUP( name );
 205     classPtr->classNameW = 0;
 206 }
 207
 208
 209 /***********************************************************************
 210  *           CLASS_SetClassNameW
 211  *
 212  * Set the class name in a class structure by copying the string.
 213  */
 214 static void CLASS_SetClassNameW( CLASS *classPtr, LPCWSTR name )
 215 {
 216     if (!HIWORD(name))
 217     {
 218         CLASS_SetClassNameA( classPtr, (LPCSTR)name );
 219         return;
 220     }
 221     if (HIWORD(classPtr->classNameA)) SEGPTR_FREE( classPtr->classNameA );
 222     if (classPtr->classNameW) HeapFree( SystemHeap, 0, classPtr->classNameW );
 223     if ((classPtr->classNameW = HeapAlloc( SystemHeap, 0,
 224                                          (lstrlenW(name)+1)*sizeof(WCHAR) )))
 225         lstrcpyW( classPtr->classNameW, name );
 226     classPtr->classNameA = 0;
 227 }
 228
 229
 230 /***********************************************************************
 231  *           CLASS_FreeClass
 232  *
 233  * Free a class structure.
 234  */
 235 static BOOL CLASS_FreeClass( CLASS *classPtr )
 236 {
 237     CLASS **ppClass;
 238     TRACE(class,"%p \n", classPtr);
 239
 240     /* Check if we can remove this class */
 241
 242     if (classPtr->cWindows > 0) return FALSE;
 243
 244     /* Remove the class from the linked list */
 245
 246     for (ppClass = &firstClass; *ppClass; ppClass = &(*ppClass)->next)
 247         if (*ppClass == classPtr) break;
 248     if (!*ppClass)
 249     {
 250         ERR( class, "Class list corrupted\n" );
 251         return FALSE;
 252     }
 253     *ppClass = classPtr->next;
 254
 255     /* Delete the class */
 256
 257     if (classPtr->dce) DCE_FreeDCE( classPtr->dce );
 258     if (classPtr->hbrBackground) DeleteObject( classPtr->hbrBackground );
 259     GlobalDeleteAtom( classPtr->atomName );
 260     CLASS_SetMenuNameA( classPtr, NULL );
 261     CLASS_SetClassNameA( classPtr, NULL );
 262     WINPROC_FreeProc( classPtr->winproc, WIN_PROC_CLASS );
 263     HeapFree( SystemHeap, 0, classPtr );
 264     return TRUE;
 265 }
 266
 267
 268 /***********************************************************************
 269  *           CLASS_FreeModuleClasses
 270  */
 271 void CLASS_FreeModuleClasses( HMODULE16 hModule )
 272 {
 273     CLASS *ptr, *next;
 274
 275     TRACE(class,"0x%08x \n", hModule);
 276
 277     for (ptr = firstClass; ptr; ptr = next)
 278     {
 279         next = ptr->next;
 280         if (ptr->hInstance == hModule) CLASS_FreeClass( ptr );
 281     }
 282 }
 283
 284
 285 /***********************************************************************
 286  *           CLASS_FindClassByAtom
 287  *
 288  * Return a pointer to the class.
 289  * hinstance has been normalized by the caller.
 290  *
 291  * NOTES
 292  *  980805 a local class will be found now if registred with hInst=0
 293  *  and looed up with a hInst!=0. msmoney does it (jsch)
 294  */
 295 CLASS *CLASS_FindClassByAtom( ATOM atom, HINSTANCE hinstance )
 296 {   CLASS * class, *tclass=0;
 297
 298     TRACE(class,"0x%08x 0x%08x\n", atom, hinstance);
 299
 300     /* First search task-specific classes */
 301
 302     for (class = firstClass; (class); class = class->next)
 303     {
 304         if (class->style & CS_GLOBALCLASS) continue;
 305         if (class->atomName == atom)
 306         {
 307             if (hinstance==class->hInstance || hinstance==0xffff )
 308             {
 309                 TRACE(class,"-- found local %p\n", class);
 310                 return class;
 311             }
 312             if (class->hInstance==0) tclass = class;
 313         }
 314     }
 315
 316       /* Then search global classes */
 317
 318     for (class = firstClass; (class); class = class->next)
 319     {
 320         if (!(class->style & CS_GLOBALCLASS)) continue;
 321         if (class->atomName == atom)
 322         {
 323             TRACE(class,"-- found global %p\n", class);
 324             return class;
 325         }
 326     }
 327
 328     /* Then check if there was a local class with hInst=0*/
 329     if ( tclass )
 330     {
 331         WARN(class,"-- found local Class registred with hInst=0\n");
 332         return tclass;
 333     }
 334
 335     TRACE(class,"-- not found\n");
 336     return 0;
 337 }
 338
 339
 340 /***********************************************************************
 341  *           CLASS_RegisterClass
 342  *
 343  * The real RegisterClass() functionality.
 344  */
 345 static CLASS *CLASS_RegisterClass( ATOM atom, HINSTANCE hInstance,
 346                                    DWORD style, INT classExtra,
 347                                    INT winExtra, WNDPROC16 wndProc,
 348                                    WINDOWPROCTYPE wndProcType )
 349 {
 350     CLASS *classPtr;
 351
 352     TRACE(class,"atom=0x%x hinst=0x%x style=0x%lx clExtr=0x%x winExtr=0x%x wndProc=0x%p ProcType=0x%x\n",
 353      atom, hInstance, style, classExtra, winExtra, wndProc, wndProcType);
 354
 355    /* Check if a class with this name already exists */
 356     classPtr = CLASS_FindClassByAtom( atom, hInstance );
 357     if (classPtr)
 358     {
 359         /* Class can be created only if it is local and */
 360         /* if the class with the same name is global.   */
 361
 362         if (style & CS_GLOBALCLASS) return NULL;
 363         if (!(classPtr->style & CS_GLOBALCLASS)) return NULL;
 364     }
 365
 366     /* Fix the extra bytes value */
 367
 368     if (classExtra < 0) classExtra = 0;
 369     else if (classExtra > 40)  /* Extra bytes are limited to 40 in Win32 */
 370         WARN(class, "Class extra bytes %d is > 40\n", classExtra);
 371     if (winExtra < 0) winExtra = 0;
 372     else if (winExtra > 40)    /* Extra bytes are limited to 40 in Win32 */
 373         WARN(class, "Win extra bytes %d is > 40\n", winExtra );
 374
 375     /* Create the class */
 376
 377     classPtr = (CLASS *)HeapAlloc( SystemHeap, 0, sizeof(CLASS) +
 378                                        classExtra - sizeof(classPtr->wExtra) );
 379     if (!classPtr) return NULL;
 380     classPtr->next        = firstClass;
 381     classPtr->magic       = CLASS_MAGIC;
 382     classPtr->cWindows    = 0;
 383     classPtr->style       = style;
 384     classPtr->winproc     = (HWINDOWPROC)0;
 385     classPtr->cbWndExtra  = winExtra;
 386     classPtr->cbClsExtra  = classExtra;
 387     classPtr->hInstance   = hInstance;
 388     classPtr->atomName    = atom;
 389     classPtr->menuNameA   = 0;
 390     classPtr->menuNameW   = 0;
 391     classPtr->classNameA  = 0;
 392     classPtr->classNameW  = 0;
 393     classPtr->dce         = (style & CS_CLASSDC) ?
 394                                  DCE_AllocDCE( 0, DCE_CLASS_DC ) : NULL;
 395
 396     WINPROC_SetProc( &classPtr->winproc, wndProc, wndProcType, WIN_PROC_CLASS);
 397
 398     /* Other values must be set by caller */
 399
 400     if (classExtra) memset( classPtr->wExtra, 0, classExtra );
 401     firstClass = classPtr;
 402     return classPtr;
 403 }
 404
 405
 406 /***********************************************************************
 407  *           RegisterClass16    (USER.57)
 408  */
 409 ATOM WINAPI RegisterClass16( const WNDCLASS16 *wc )
 410 {
 411     ATOM atom;
 412     CLASS *classPtr;
 413     HINSTANCE16 hInstance=GetExePtr(wc->hInstance);
 414
 415     if (!(atom = GlobalAddAtom16( wc->lpszClassName ))) return 0;
 416     if (!(classPtr = CLASS_RegisterClass( atom, hInstance, wc->style,
 417                                           wc->cbClsExtra, wc->cbWndExtra,
 418                                           wc->lpfnWndProc, WIN_PROC_16 )))
 419     {
 420         GlobalDeleteAtom( atom );
 421         return 0;
 422     }
 423
 424     TRACE(class, "atom=%04x wndproc=%08lx hinst=%04x
 425 bg=%04x style=%08x clsExt=%d winExt=%d class=%p name='%s'\n",
 426                    atom, (DWORD)wc->lpfnWndProc, hInstance,
 427                    wc->hbrBackground, wc->style, wc->cbClsExtra,
 428                    wc->cbWndExtra, classPtr,
 429                    HIWORD(wc->lpszClassName) ?
 430                        (char *)PTR_SEG_TO_LIN(wc->lpszClassName) : "" );
 431
 432     classPtr->hIcon         = wc->hIcon;
 433     classPtr->hIconSm       = 0;
 434     classPtr->hCursor       = wc->hCursor;
 435     classPtr->hbrBackground = wc->hbrBackground;
 436
 437     CLASS_SetMenuNameA( classPtr, HIWORD(wc->lpszMenuName) ?
 438                  PTR_SEG_TO_LIN(wc->lpszMenuName) : (LPCSTR)wc->lpszMenuName );
 439     CLASS_SetClassNameA( classPtr, HIWORD(wc->lpszClassName) ?
 440                  PTR_SEG_TO_LIN(wc->lpszClassName) : (LPCSTR)wc->lpszClassName );
 441
 442     return atom;
 443 }
 444
 445
 446 /***********************************************************************
 447  *           RegisterClass32A      (USER32.427)
 448  * RETURNS
 449  *      >0: Unique identifier
 450  *      0: Failure
 451  */
 452 ATOM WINAPI RegisterClassA(
 453             const WNDCLASSA* wc /* Address of structure with class data */
 454 ) {
 455     ATOM atom;
 456     CLASS *classPtr;
 457
 458     if (!(atom = GlobalAddAtomA( wc->lpszClassName )))
 459     {
 460         SetLastError(ERROR_CLASS_ALREADY_EXISTS);
 461         return FALSE;
 462     }
 463     if (!(classPtr = CLASS_RegisterClass( atom, wc->hInstance, wc->style,
 464                                           wc->cbClsExtra, wc->cbWndExtra,
 465                                           (WNDPROC16)wc->lpfnWndProc,
 466                                           WIN_PROC_32A )))
 467     {   GlobalDeleteAtom( atom );
 468         SetLastError(ERROR_CLASS_ALREADY_EXISTS);
 469         return FALSE;
 470     }
 471
 472     TRACE(class, "atom=%04x wndproc=%08lx hinst=%04x bg=%04x style=%08x clsExt=%d winExt=%d class=%p name='%s'\n",
 473                    atom, (DWORD)wc->lpfnWndProc, wc->hInstance,
 474                    wc->hbrBackground, wc->style, wc->cbClsExtra,
 475                    wc->cbWndExtra, classPtr,
 476                    HIWORD(wc->lpszClassName) ? wc->lpszClassName : "" );
 477
 478     classPtr->hIcon         = (HICON16)wc->hIcon;
 479     classPtr->hIconSm       = 0;
 480     classPtr->hCursor       = (HCURSOR16)wc->hCursor;
 481     classPtr->hbrBackground = (HBRUSH16)wc->hbrBackground;
 482
 483     CLASS_SetMenuNameA( classPtr, wc->lpszMenuName );
 484     CLASS_SetClassNameA( classPtr, wc->lpszClassName );
 485     return atom;
 486 }
 487
 488
 489 /***********************************************************************
 490  *           RegisterClass32W      (USER32.430)
 491  */
 492 ATOM WINAPI RegisterClassW( const WNDCLASSW* wc )
 493 {
 494     ATOM atom;
 495     CLASS *classPtr;
 496
 497     if (!(atom = GlobalAddAtomW( wc->lpszClassName )))
 498     {
 499         SetLastError(ERROR_CLASS_ALREADY_EXISTS);
 500         return FALSE;
 501     }
 502     if (!(classPtr = CLASS_RegisterClass( atom, wc->hInstance, wc->style,
 503                                           wc->cbClsExtra, wc->cbWndExtra,
 504                                           (WNDPROC16)wc->lpfnWndProc,
 505                                           WIN_PROC_32W )))
 506     {
 507         SetLastError(ERROR_CLASS_ALREADY_EXISTS);
 508         GlobalDeleteAtom( atom );
 509         return 0;
 510     }
 511
 512     TRACE(class, "atom=%04x wndproc=%08lx hinst=%04x bg=%04x style=%08x clsExt=%d winExt=%d class=%p\n",
 513                    atom, (DWORD)wc->lpfnWndProc, wc->hInstance,
 514                    wc->hbrBackground, wc->style, wc->cbClsExtra,
 515                    wc->cbWndExtra, classPtr );
 516
 517     classPtr->hIcon         = (HICON16)wc->hIcon;
 518     classPtr->hIconSm       = 0;
 519     classPtr->hCursor       = (HCURSOR16)wc->hCursor;
 520     classPtr->hbrBackground = (HBRUSH16)wc->hbrBackground;
 521
 522     CLASS_SetMenuNameW( classPtr, wc->lpszMenuName );
 523     CLASS_SetClassNameW( classPtr, wc->lpszClassName );
 524     return atom;
 525 }
 526
 527
 528 /***********************************************************************
 529  *           RegisterClassEx16    (USER.397)
 530  */
 531 ATOM WINAPI RegisterClassEx16( const WNDCLASSEX16 *wc )
 532 {
 533     ATOM atom;
 534     CLASS *classPtr;
 535     HINSTANCE16 hInstance = GetExePtr( wc->hInstance );
 536
 537     if (!(atom = GlobalAddAtom16( wc->lpszClassName ))) return 0;
 538     if (!(classPtr = CLASS_RegisterClass( atom, hInstance, wc->style,
 539                                           wc->cbClsExtra, wc->cbWndExtra,
 540                                           wc->lpfnWndProc, WIN_PROC_16 )))
 541     {
 542         GlobalDeleteAtom( atom );
 543         return 0;
 544     }
 545
 546     TRACE(class, "atom=%04x wndproc=%08lx hinst=%04x bg=%04x style=%08x clsExt=%d winExt=%d class=%p\n",
 547                    atom, (DWORD)wc->lpfnWndProc, hInstance,
 548                    wc->hbrBackground, wc->style, wc->cbClsExtra,
 549                    wc->cbWndExtra, classPtr );
 550
 551     classPtr->hIcon         = wc->hIcon;
 552     classPtr->hIconSm       = wc->hIconSm;
 553     classPtr->hCursor       = wc->hCursor;
 554     classPtr->hbrBackground = wc->hbrBackground;
 555
 556     CLASS_SetMenuNameA( classPtr, HIWORD(wc->lpszMenuName) ?
 557                  PTR_SEG_TO_LIN(wc->lpszMenuName) : (LPCSTR)wc->lpszMenuName );
 558     CLASS_SetClassNameA( classPtr, HIWORD(wc->lpszClassName) ?
 559                  PTR_SEG_TO_LIN(wc->lpszClassName) : (LPCSTR)wc->lpszClassName );
 560     return atom;
 561 }
 562
 563
 564 /***********************************************************************
 565  *           RegisterClassEx32A      (USER32.428)
 566  */
 567 ATOM WINAPI RegisterClassExA( const WNDCLASSEXA* wc )
 568 {
 569     ATOM atom;
 570     CLASS *classPtr;
 571
 572     if (!(atom = GlobalAddAtomA( wc->lpszClassName )))
 573     {
 574         SetLastError(ERROR_CLASS_ALREADY_EXISTS);
 575         return FALSE;
 576     }
 577     if (!(classPtr = CLASS_RegisterClass( atom, wc->hInstance, wc->style,
 578                                           wc->cbClsExtra, wc->cbWndExtra,
 579                                           (WNDPROC16)wc->lpfnWndProc,
 580                                           WIN_PROC_32A )))
 581     {
 582         SetLastError(ERROR_CLASS_ALREADY_EXISTS);
 583         GlobalDeleteAtom( atom );
 584         return FALSE;
 585     }
 586
 587     TRACE(class, "atom=%04x wndproc=%08lx hinst=%04x bg=%04x style=%08x clsExt=%d winExt=%d class=%p\n",
 588                    atom, (DWORD)wc->lpfnWndProc, wc->hInstance,
 589                    wc->hbrBackground, wc->style, wc->cbClsExtra,
 590                    wc->cbWndExtra, classPtr );
 591
 592     classPtr->hIcon         = (HICON16)wc->hIcon;
 593     classPtr->hIconSm       = (HICON16)wc->hIconSm;
 594     classPtr->hCursor       = (HCURSOR16)wc->hCursor;
 595     classPtr->hbrBackground = (HBRUSH16)wc->hbrBackground;
 596     CLASS_SetMenuNameA( classPtr, wc->lpszMenuName );
 597     CLASS_SetClassNameA( classPtr, wc->lpszClassName );
 598     return atom;
 599 }
 600
 601
 602 /***********************************************************************
 603  *           RegisterClassEx32W      (USER32.429)
 604  */
 605 ATOM WINAPI RegisterClassExW( const WNDCLASSEXW* wc )
 606 {
 607     ATOM atom;
 608     CLASS *classPtr;
 609
 610     if (!(atom = GlobalAddAtomW( wc->lpszClassName )))
 611     {
 612         SetLastError(ERROR_CLASS_ALREADY_EXISTS);
 613         return 0;
 614     }
 615     if (!(classPtr = CLASS_RegisterClass( atom, wc->hInstance, wc->style,
 616                                           wc->cbClsExtra, wc->cbWndExtra,
 617                                           (WNDPROC16)wc->lpfnWndProc,
 618                                           WIN_PROC_32W )))
 619     {
 620         SetLastError(ERROR_CLASS_ALREADY_EXISTS);
 621         GlobalDeleteAtom( atom );
 622         return 0;
 623     }
 624
 625     TRACE(class, "atom=%04x wndproc=%08lx hinst=%04x bg=%04x style=%08x clsExt=%d winExt=%d class=%p\n",
 626                    atom, (DWORD)wc->lpfnWndProc, wc->hInstance,
 627                    wc->hbrBackground, wc->style, wc->cbClsExtra,
 628                    wc->cbWndExtra, classPtr );
 629
 630     classPtr->hIcon         = (HICON16)wc->hIcon;
 631     classPtr->hIconSm       = (HICON16)wc->hIconSm;
 632     classPtr->hCursor       = (HCURSOR16)wc->hCursor;
 633     classPtr->hbrBackground = (HBRUSH16)wc->hbrBackground;
 634     CLASS_SetMenuNameW( classPtr, wc->lpszMenuName );
 635     CLASS_SetClassNameW( classPtr, wc->lpszClassName );
 636     return atom;
 637 }
 638
 639
 640 /***********************************************************************
 641  *           UnregisterClass16    (USER.403)
 642  */
 643 BOOL16 WINAPI UnregisterClass16( SEGPTR className, HINSTANCE16 hInstance )
 644 {
 645     CLASS *classPtr;
 646     ATOM atom;
 647
 648     hInstance = GetExePtr( hInstance );
 649     if (!(atom = GlobalFindAtom16( className ))) return FALSE;
 650     if (!(classPtr = CLASS_FindClassByAtom( atom, hInstance )) ||
 651         (classPtr->hInstance != hInstance)) return FALSE;
 652     return CLASS_FreeClass( classPtr );
 653 }
 654
 655
 656 /***********************************************************************
 657  *           UnregisterClass32A    (USER32.563)
 658  *
 659  */
 660 BOOL WINAPI UnregisterClassA( LPCSTR className, HINSTANCE hInstance )
 661 {   CLASS *classPtr;
 662     ATOM atom;
 663     BOOL ret;
 664
 665     TRACE(class,"%s %x\n",className, hInstance);
 666
 667     if (!(atom = GlobalFindAtomA( className )))
 668     {
 669         SetLastError(ERROR_CLASS_DOES_NOT_EXIST);
 670         return FALSE;
 671     }
 672     if (!(classPtr = CLASS_FindClassByAtom( atom, hInstance )) ||
 673         (classPtr->hInstance != hInstance))
 674     {
 675         SetLastError(ERROR_CLASS_DOES_NOT_EXIST);
 676         return FALSE;
 677     }
 678     if (!(ret = CLASS_FreeClass( classPtr )))
 679         SetLastError(ERROR_CLASS_HAS_WINDOWS);
 680     return ret;
 681 }
 682
 683 /***********************************************************************
 684  *           UnregisterClass32W    (USER32.564)
 685  */
 686 BOOL WINAPI UnregisterClassW( LPCWSTR className, HINSTANCE hInstance )
 687 {   CLASS *classPtr;
 688     ATOM atom;
 689     BOOL ret;
 690
 691     TRACE(class,"%s %x\n",debugstr_w(className), hInstance);
 692
 693     if (!(atom = GlobalFindAtomW( className )))
 694     {
 695         SetLastError(ERROR_CLASS_DOES_NOT_EXIST);
 696         return FALSE;
 697     }
 698     if (!(classPtr = CLASS_FindClassByAtom( atom, hInstance )) ||
 699         (classPtr->hInstance != hInstance))
 700     {
 701         SetLastError(ERROR_CLASS_DOES_NOT_EXIST);
 702         return FALSE;
 703     }
 704     if (!(ret = CLASS_FreeClass( classPtr )))
 705         SetLastError(ERROR_CLASS_HAS_WINDOWS);
 706     return ret;
 707 }
 708
 709 /***********************************************************************
 710  *           GetClassWord16    (USER.129)
 711  */
 712 WORD WINAPI GetClassWord16( HWND16 hwnd, INT16 offset )
 713 {
 714     return GetClassWord( hwnd, offset );
 715 }
 716
 717
 718 /***********************************************************************
 719  *           GetClassWord32    (USER32.219)
 720  */
 721 WORD WINAPI GetClassWord( HWND hwnd, INT offset )
 722 {
 723     WND * wndPtr;
 724
 725     TRACE(class,"%x %x\n",hwnd, offset);
 726
 727     if (!(wndPtr = WIN_FindWndPtr( hwnd ))) return 0;
 728     if (offset >= 0)
 729     {
 730         if (offset <= wndPtr->class->cbClsExtra - sizeof(WORD))
 731             return GET_WORD(((char *)wndPtr->class->wExtra) + offset);
 732     }
 733     else switch(offset)
 734     {
 735         case GCW_HBRBACKGROUND: return wndPtr->class->hbrBackground;
 736         case GCW_HCURSOR:       return wndPtr->class->hCursor;
 737         case GCW_HICON:         return wndPtr->class->hIcon;
 738         case GCW_HICONSM:       return wndPtr->class->hIconSm;
 739         case GCW_ATOM:          return wndPtr->class->atomName;
 740         case GCW_STYLE:
 741         case GCW_CBWNDEXTRA:
 742         case GCW_CBCLSEXTRA:
 743         case GCW_HMODULE:
 744             return (WORD)GetClassLongA( hwnd, offset );
 745     }
 746
 747     WARN(class, "Invalid offset %d\n", offset);
 748     return 0;
 749 }
 750
 751
 752 /***********************************************************************
 753  *           GetClassLong16    (USER.131)
 754  */
 755 LONG WINAPI GetClassLong16( HWND16 hwnd, INT16 offset )
 756 {
 757     WND *wndPtr;
 758     LONG ret;
 759
 760     TRACE(class,"%x %x\n",hwnd, offset);
 761
 762     switch( offset )
 763     {
 764     case GCL_WNDPROC:
 765         if (!(wndPtr = WIN_FindWndPtr( hwnd ))) return 0;
 766         return (LONG)WINPROC_GetProc( wndPtr->class->winproc, WIN_PROC_16 );
 767     case GCL_MENUNAME:
 768         ret = GetClassLongA( hwnd, offset );
 769         return (LONG)SEGPTR_GET( (void *)ret );
 770     default:
 771         return GetClassLongA( hwnd, offset );
 772     }
 773 }
 774
 775
 776 /***********************************************************************
 777  *           GetClassLong32A    (USER32.215)
 778  */
 779 LONG WINAPI GetClassLongA( HWND hwnd, INT offset )
 780 {
 781     WND * wndPtr;
 782
 783     TRACE(class,"%x %x\n",hwnd, offset);
 784
 785     if (!(wndPtr = WIN_FindWndPtr( hwnd ))) return 0;
 786     if (offset >= 0)
 787     {
 788         if (offset <= wndPtr->class->cbClsExtra - sizeof(LONG))
 789             return GET_DWORD(((char *)wndPtr->class->wExtra) + offset);
 790     }
 791     switch(offset)
 792     {
 793         case GCL_STYLE:      return (LONG)wndPtr->class->style;
 794         case GCL_CBWNDEXTRA: return (LONG)wndPtr->class->cbWndExtra;
 795         case GCL_CBCLSEXTRA: return (LONG)wndPtr->class->cbClsExtra;
 796         case GCL_HMODULE:    return (LONG)wndPtr->class->hInstance;
 797         case GCL_WNDPROC:
 798             return (LONG)WINPROC_GetProc(wndPtr->class->winproc, WIN_PROC_32A);
 799         case GCL_MENUNAME:
 800             return (LONG)CLASS_GetMenuNameA( wndPtr->class );
 801         case GCW_ATOM:
 802         case GCL_HBRBACKGROUND:
 803         case GCL_HCURSOR:
 804         case GCL_HICON:
 805         case GCL_HICONSM:
 806             return GetClassWord( hwnd, offset );
 807     }
 808     WARN(class, "Invalid offset %d\n", offset);
 809     return 0;
 810 }
 811
 812
 813 /***********************************************************************
 814  *           GetClassLong32W    (USER32.216)
 815  */
 816 LONG WINAPI GetClassLongW( HWND hwnd, INT offset )
 817 {
 818     WND * wndPtr;
 819
 820     TRACE(class,"%x %x\n",hwnd, offset);
 821
 822     switch(offset)
 823     {
 824     case GCL_WNDPROC:
 825         if (!(wndPtr = WIN_FindWndPtr( hwnd ))) return 0;
 826         return (LONG)WINPROC_GetProc( wndPtr->class->winproc, WIN_PROC_32W );
 827     case GCL_MENUNAME:
 828         if (!(wndPtr = WIN_FindWndPtr( hwnd ))) return 0;
 829         return (LONG)CLASS_GetMenuNameW( wndPtr->class );
 830     default:
 831         return GetClassLongA( hwnd, offset );
 832     }
 833 }
 834
 835
 836 /***********************************************************************
 837  *           SetClassWord16    (USER.130)
 838  */
 839 WORD WINAPI SetClassWord16( HWND16 hwnd, INT16 offset, WORD newval )
 840 {
 841     return SetClassWord( hwnd, offset, newval );
 842 }
 843
 844
 845 /***********************************************************************
 846  *           SetClassWord32    (USER32.469)
 847  */
 848 WORD WINAPI SetClassWord( HWND hwnd, INT offset, WORD newval )
 849 {
 850     WND * wndPtr;
 851     WORD retval = 0;
 852     void *ptr;
 853
 854     TRACE(class,"%x %x %x\n",hwnd, offset, newval);
 855
 856     if (!(wndPtr = WIN_FindWndPtr( hwnd ))) return 0;
 857     if (offset >= 0)
 858     {
 859         if (offset + sizeof(WORD) <= wndPtr->class->cbClsExtra)
 860             ptr = ((char *)wndPtr->class->wExtra) + offset;
 861         else
 862         {
 863             WARN( class, "Invalid offset %d\n", offset );
 864             return 0;
 865         }
 866     }
 867     else switch(offset)
 868     {
 869         case GCW_STYLE:
 870         case GCW_CBWNDEXTRA:
 871         case GCW_CBCLSEXTRA:
 872         case GCW_HMODULE:
 873             return (WORD)SetClassLongA( hwnd, offset, (LONG)newval );
 874         case GCW_HBRBACKGROUND: ptr = &wndPtr->class->hbrBackground; break;
 875         case GCW_HCURSOR:       ptr = &wndPtr->class->hCursor; break;
 876         case GCW_HICON:         ptr = &wndPtr->class->hIcon; break;
 877         case GCW_HICONSM:       ptr = &wndPtr->class->hIconSm; break;
 878         case GCW_ATOM:          ptr = &wndPtr->class->atomName; break;
 879         default:
 880             WARN( class, "Invalid offset %d\n", offset);
 881             return 0;
 882     }
 883     retval = GET_WORD(ptr);
 884     PUT_WORD( ptr, newval );
 885
 886     /* Note: If the GCW_ATOM was changed, this means that the WNDCLASS className fields
 887     need to be updated as well.  Problem is that we can't tell whether the atom is
 888     using wide or narrow characters.  For now, we'll just NULL out the className
 889     fields, and emit a FIXME. */
 890     if (offset == GCW_ATOM)
 891     {
 892         CLASS_SetClassNameA( wndPtr->class, NULL );
 893         FIXME(class,"GCW_ATOM changed for a class.  Not updating className, so GetClassInfoEx may not return correct className!\n");
 894     }
 895     return retval;
 896 }
 897
 898
 899 /***********************************************************************
 900  *           SetClassLong16    (USER.132)
 901  */
 902 LONG WINAPI SetClassLong16( HWND16 hwnd, INT16 offset, LONG newval )
 903 {
 904     WND *wndPtr;
 905     LONG retval;
 906
 907     TRACE(class,"%x %x %lx\n",hwnd, offset, newval);
 908
 909     switch(offset)
 910     {
 911     case GCL_WNDPROC:
 912         if (!(wndPtr = WIN_FindWndPtr(hwnd))) return 0;
 913         retval = (LONG)WINPROC_GetProc( wndPtr->class->winproc, WIN_PROC_16 );
 914         WINPROC_SetProc( &wndPtr->class->winproc, (WNDPROC16)newval,
 915                          WIN_PROC_16, WIN_PROC_CLASS );
 916         return retval;
 917     case GCL_MENUNAME:
 918         return SetClassLongA( hwnd, offset, (LONG)PTR_SEG_TO_LIN(newval) );
 919     default:
 920         return SetClassLongA( hwnd, offset, newval );
 921     }
 922 }
 923
 924
 925 /***********************************************************************
 926  *           SetClassLong32A    (USER32.467)
 927  */
 928 LONG WINAPI SetClassLongA( HWND hwnd, INT offset, LONG newval )
 929 {
 930     WND * wndPtr;
 931     LONG retval = 0;
 932     void *ptr;
 933
 934     TRACE(class,"%x %x %lx\n",hwnd, offset, newval);
 935
 936     if (!(wndPtr = WIN_FindWndPtr( hwnd ))) return 0;
 937     if (offset >= 0)
 938     {
 939         if (offset + sizeof(LONG) <= wndPtr->class->cbClsExtra)
 940             ptr = ((char *)wndPtr->class->wExtra) + offset;
 941         else
 942         {
 943             WARN( class, "Invalid offset %d\n", offset );
 944             return 0;
 945         }
 946     }
 947     else switch(offset)
 948     {
 949         case GCL_MENUNAME:
 950             CLASS_SetMenuNameA( wndPtr->class, (LPCSTR)newval );
 951             return 0;  /* Old value is now meaningless anyway */
 952         case GCL_WNDPROC:
 953             retval = (LONG)WINPROC_GetProc( wndPtr->class->winproc,
 954                                             WIN_PROC_32A );
 955             WINPROC_SetProc( &wndPtr->class->winproc, (WNDPROC16)newval,
 956                              WIN_PROC_32A, WIN_PROC_CLASS );
 957             return retval;
 958         case GCL_HBRBACKGROUND:
 959         case GCL_HCURSOR:
 960         case GCL_HICON:
 961         case GCL_HICONSM:
 962             return SetClassWord( hwnd, offset, (WORD)newval );
 963         case GCL_STYLE:      ptr = &wndPtr->class->style; break;
 964         case GCL_CBWNDEXTRA: ptr = &wndPtr->class->cbWndExtra; break;
 965         case GCL_CBCLSEXTRA: ptr = &wndPtr->class->cbClsExtra; break;
 966         case GCL_HMODULE:    ptr = &wndPtr->class->hInstance; break;
 967         default:
 968             WARN( class, "Invalid offset %d\n", offset );
 969             return 0;
 970     }
 971     retval = GET_DWORD(ptr);
 972     PUT_DWORD( ptr, newval );
 973     return retval;
 974 }
 975
 976
 977 /***********************************************************************
 978  *           SetClassLong32W    (USER32.468)
 979  */
 980 LONG WINAPI SetClassLongW( HWND hwnd, INT offset, LONG newval )
 981 {
 982     WND *wndPtr;
 983     LONG retval;
 984
 985     TRACE(class,"%x %x %lx\n",hwnd, offset, newval);
 986
 987     switch(offset)
 988     {
 989     case GCL_WNDPROC:
 990         if (!(wndPtr = WIN_FindWndPtr(hwnd))) return 0;
 991         retval = (LONG)WINPROC_GetProc( wndPtr->class->winproc, WIN_PROC_32W );
 992         WINPROC_SetProc( &wndPtr->class->winproc, (WNDPROC16)newval,
 993                          WIN_PROC_32W, WIN_PROC_CLASS );
 994         return retval;
 995     case GCL_MENUNAME:
 996         if (!(wndPtr = WIN_FindWndPtr(hwnd))) return 0;
 997         CLASS_SetMenuNameW( wndPtr->class, (LPCWSTR)newval );
 998         return 0;  /* Old value is now meaningless anyway */
 999     default:
1000         return SetClassLongA( hwnd, offset, newval );
1001     }
1002 }
1003
1004
1005 /***********************************************************************
1006  *           GetClassName16      (USER.58)
1007  */
1008 INT16 WINAPI GetClassName16( HWND16 hwnd, LPSTR buffer, INT16 count )
1009 {
1010     WND *wndPtr;
1011     if (!(wndPtr = WIN_FindWndPtr(hwnd))) return 0;
1012     return GlobalGetAtomName16( wndPtr->class->atomName, buffer, count );
1013 }
1014
1015
1016 /***********************************************************************
1017  *           GetClassName32A      (USER32.217)
1018  */
1019 INT WINAPI GetClassNameA( HWND hwnd, LPSTR buffer, INT count )
1020 {   INT ret;
1021     WND *wndPtr;
1022
1023     if (!(wndPtr = WIN_FindWndPtr(hwnd))) return 0;
1024     ret = GlobalGetAtomNameA( wndPtr->class->atomName, buffer, count );
1025
1026     TRACE(class,"%x %s %x\n",hwnd, buffer, count);
1027     return ret;
1028 }
1029
1030
1031 /***********************************************************************
1032  *           GetClassName32W      (USER32.218)
1033  */
1034 INT WINAPI GetClassNameW( HWND hwnd, LPWSTR buffer, INT count )
1035 {   INT ret;
1036     WND *wndPtr;
1037
1038     if (!(wndPtr = WIN_FindWndPtr(hwnd))) return 0;
1039     ret = GlobalGetAtomNameW( wndPtr->class->atomName, buffer, count );
1040
1041     TRACE(class,"%x %s %x\n",hwnd, debugstr_w(buffer), count);
1042
1043     return ret;
1044 }
1045
1046
1047 /***********************************************************************
1048  *           GetClassInfo16      (USER.404)
1049  */
1050 BOOL16 WINAPI GetClassInfo16( HINSTANCE16 hInstance, SEGPTR name,
1051                               WNDCLASS16 *wc )
1052 {
1053     ATOM atom;
1054     CLASS *classPtr;
1055
1056     TRACE(class,"%x %p %p\n",hInstance, PTR_SEG_TO_LIN (name), wc);
1057
1058     hInstance = GetExePtr( hInstance );
1059     if (!(atom = GlobalFindAtom16( name )) ||
1060         !(classPtr = CLASS_FindClassByAtom( atom, hInstance )))
1061         return FALSE;
1062     if ((hInstance != classPtr->hInstance) &&
1063         !(classPtr->style & CS_GLOBALCLASS)) /*BWCC likes to pass hInstance=0*/
1064         return FALSE;
1065     wc->style         = (UINT16)classPtr->style;
1066     wc->lpfnWndProc   = WINPROC_GetProc( classPtr->winproc, WIN_PROC_16 );
1067     wc->cbClsExtra    = (INT16)classPtr->cbClsExtra;
1068     wc->cbWndExtra    = (INT16)classPtr->cbWndExtra;
1069     wc->hInstance     = (HINSTANCE16)classPtr->hInstance;
1070     wc->hIcon         = classPtr->hIcon;
1071     wc->hCursor       = classPtr->hCursor;
1072     wc->hbrBackground = classPtr->hbrBackground;
1073     wc->lpszClassName = (SEGPTR)CLASS_GetClassNameA( classPtr );;
1074     if (HIWORD(wc->lpszClassName))  /* Make it a SEGPTR */
1075         wc->lpszClassName = SEGPTR_GET( (LPSTR)wc->lpszClassName );
1076     wc->lpszMenuName  = (SEGPTR)CLASS_GetMenuNameA( classPtr );
1077     if (HIWORD(wc->lpszMenuName))  /* Make it a SEGPTR */
1078         wc->lpszMenuName = SEGPTR_GET( (LPSTR)wc->lpszMenuName );
1079     return TRUE;
1080 }
1081
1082
1083 /***********************************************************************
1084  *           GetClassInfo32A      (USER32.211)
1085  */
1086 BOOL WINAPI GetClassInfoA( HINSTANCE hInstance, LPCSTR name,
1087                                WNDCLASSA *wc )
1088 {
1089     ATOM atom;
1090     CLASS *classPtr;
1091
1092     TRACE(class,"%x %p %p\n",hInstance, name, wc);
1093
1094     /* workaround: if hInstance=NULL you expect to get the system classes
1095     but this classes (as example from comctl32.dll SysListView) won't be
1096     registred with hInstance=NULL in WINE because of the late loading
1097     of this dll. fixes file dialogs in WinWord95 (jsch)*/
1098
1099     if (!(atom=GlobalFindAtomA(name)) || !(classPtr=CLASS_FindClassByAtom(atom,hInstance)))
1100         return FALSE;
1101
1102     if  (classPtr->hInstance && (hInstance != classPtr->hInstance))
1103     {
1104         if (hInstance) return FALSE;
1105         else
1106             WARN(class,"systemclass %s (hInst=0) demanded but only class with hInst!=0 found\n",name);
1107     }
1108
1109     wc->style         = classPtr->style;
1110     wc->lpfnWndProc   = (WNDPROC)WINPROC_GetProc( classPtr->winproc,
1111                                                     WIN_PROC_32A );
1112     wc->cbClsExtra    = classPtr->cbClsExtra;
1113     wc->cbWndExtra    = classPtr->cbWndExtra;
1114     wc->hInstance     = classPtr->hInstance;
1115     wc->hIcon         = (HICON)classPtr->hIcon;
1116     wc->hCursor       = (HCURSOR)classPtr->hCursor;
1117     wc->hbrBackground = (HBRUSH)classPtr->hbrBackground;
1118     wc->lpszMenuName  = CLASS_GetMenuNameA( classPtr );
1119     wc->lpszClassName = CLASS_GetClassNameA( classPtr );
1120     return TRUE;
1121 }
1122
1123
1124 /***********************************************************************
1125  *           GetClassInfo32W      (USER32.214)
1126  */
1127 BOOL WINAPI GetClassInfoW( HINSTANCE hInstance, LPCWSTR name,
1128                                WNDCLASSW *wc )
1129 {
1130     ATOM atom;
1131     CLASS *classPtr;
1132
1133     TRACE(class,"%x %p %p\n",hInstance, name, wc);
1134
1135     if (!(atom = GlobalFindAtomW( name )) ||
1136         !(classPtr = CLASS_FindClassByAtom( atom, hInstance )) ||
1137         (classPtr->hInstance && (hInstance != classPtr->hInstance)))
1138         return FALSE;
1139
1140     wc->style         = classPtr->style;
1141     wc->lpfnWndProc   = (WNDPROC)WINPROC_GetProc( classPtr->winproc,
1142                                                     WIN_PROC_32W );
1143     wc->cbClsExtra    = classPtr->cbClsExtra;
1144     wc->cbWndExtra    = classPtr->cbWndExtra;
1145     wc->hInstance     = classPtr->hInstance;
1146     wc->hIcon         = (HICON)classPtr->hIcon;
1147     wc->hCursor       = (HCURSOR)classPtr->hCursor;
1148     wc->hbrBackground = (HBRUSH)classPtr->hbrBackground;
1149     wc->lpszMenuName  = CLASS_GetMenuNameW( classPtr );
1150     wc->lpszClassName = CLASS_GetClassNameW( classPtr );
1151     return TRUE;
1152 }
1153
1154
1155 /***********************************************************************
1156  *           GetClassInfoEx16      (USER.398)
1157  *
1158  * FIXME: this is just a guess, I have no idea if GetClassInfoEx() is the
1159  * same in Win16 as in Win32. --AJ
1160  */
1161 BOOL16 WINAPI GetClassInfoEx16( HINSTANCE16 hInstance, SEGPTR name,
1162                                 WNDCLASSEX16 *wc )
1163 {
1164     ATOM atom;
1165     CLASS *classPtr;
1166
1167     TRACE(class,"%x %p %p\n",hInstance,PTR_SEG_TO_LIN( name ), wc);
1168
1169     hInstance = GetExePtr( hInstance );
1170     if (!(atom = GlobalFindAtom16( name )) ||
1171         !(classPtr = CLASS_FindClassByAtom( atom, hInstance )) ||
1172         (hInstance != classPtr->hInstance)) return FALSE;
1173     wc->style         = classPtr->style;
1174     wc->lpfnWndProc   = WINPROC_GetProc( classPtr->winproc, WIN_PROC_16 );
1175     wc->cbClsExtra    = (INT16)classPtr->cbClsExtra;
1176     wc->cbWndExtra    = (INT16)classPtr->cbWndExtra;
1177     wc->hInstance     = (HINSTANCE16)classPtr->hInstance;
1178     wc->hIcon         = classPtr->hIcon;
1179     wc->hIconSm       = classPtr->hIconSm;
1180     wc->hCursor       = classPtr->hCursor;
1181     wc->hbrBackground = classPtr->hbrBackground;
1182     wc->lpszClassName = (SEGPTR)0;
1183     wc->lpszMenuName  = (SEGPTR)CLASS_GetMenuNameA( classPtr );
1184     if (HIWORD(wc->lpszMenuName))  /* Make it a SEGPTR */
1185         wc->lpszMenuName = SEGPTR_GET( (LPSTR)wc->lpszMenuName );
1186     wc->lpszClassName  = (SEGPTR)CLASS_GetClassNameA( classPtr );
1187     if (HIWORD(wc->lpszClassName))  /* Make it a SEGPTR */
1188         wc->lpszClassName = SEGPTR_GET( (LPSTR)wc->lpszClassName );
1189     return TRUE;
1190 }
1191
1192
1193 /***********************************************************************
1194  *           GetClassInfoEx32A      (USER32.212)
1195  */
1196 BOOL WINAPI GetClassInfoExA( HINSTANCE hInstance, LPCSTR name,
1197                                  WNDCLASSEXA *wc )
1198 {
1199     ATOM atom;
1200     CLASS *classPtr;
1201
1202     TRACE(class,"%x %p %p\n",hInstance, name, wc);
1203
1204     if (!(atom = GlobalFindAtomA( name )) ||
1205         !(classPtr = CLASS_FindClassByAtom( atom, hInstance ))
1206         /*|| (hInstance != classPtr->hInstance) */ ) return FALSE;
1207     wc->style         = classPtr->style;
1208     wc->lpfnWndProc   = (WNDPROC)WINPROC_GetProc( classPtr->winproc,
1209                                                     WIN_PROC_32A );
1210     wc->cbClsExtra    = classPtr->cbClsExtra;
1211     wc->cbWndExtra    = classPtr->cbWndExtra;
1212     wc->hInstance     = classPtr->hInstance;
1213     wc->hIcon         = (HICON)classPtr->hIcon;
1214     wc->hIconSm       = (HICON)classPtr->hIconSm;
1215     wc->hCursor       = (HCURSOR)classPtr->hCursor;
1216     wc->hbrBackground = (HBRUSH)classPtr->hbrBackground;
1217     wc->lpszMenuName  = CLASS_GetMenuNameA( classPtr );
1218     wc->lpszClassName  = CLASS_GetClassNameA( classPtr );
1219     return TRUE;
1220 }
1221
1222
1223 /***********************************************************************
1224  *           GetClassInfoEx32W      (USER32.213)
1225  */
1226 BOOL WINAPI GetClassInfoExW( HINSTANCE hInstance, LPCWSTR name,
1227                                  WNDCLASSEXW *wc )
1228 {
1229     ATOM atom;
1230     CLASS *classPtr;
1231
1232     TRACE(class,"%x %p %p\n",hInstance, name, wc);
1233
1234     if (!(atom = GlobalFindAtomW( name )) ||
1235         !(classPtr = CLASS_FindClassByAtom( atom, hInstance )) ||
1236         (hInstance != classPtr->hInstance)) return FALSE;
1237     wc->style         = classPtr->style;
1238     wc->lpfnWndProc   = (WNDPROC)WINPROC_GetProc( classPtr->winproc,
1239                                                     WIN_PROC_32W );
1240     wc->cbClsExtra    = classPtr->cbClsExtra;
1241     wc->cbWndExtra    = classPtr->cbWndExtra;
1242     wc->hInstance     = classPtr->hInstance;
1243     wc->hIcon         = (HICON)classPtr->hIcon;
1244     wc->hIconSm       = (HICON)classPtr->hIconSm;
1245     wc->hCursor       = (HCURSOR)classPtr->hCursor;
1246     wc->hbrBackground = (HBRUSH)classPtr->hbrBackground;
1247     wc->lpszMenuName  = CLASS_GetMenuNameW( classPtr );
1248     wc->lpszClassName = CLASS_GetClassNameW( classPtr );;
1249     return TRUE;
1250 }
1251
1252
1253 /***********************************************************************
1254  *           ClassFirst      (TOOLHELP.69)
1255  */
1256 BOOL16 WINAPI ClassFirst16( CLASSENTRY *pClassEntry )
1257 {
1258     TRACE(class,"%p\n",pClassEntry);
1259     pClassEntry->wNext = 1;
1260     return ClassNext16( pClassEntry );
1261 }
1262
1263
1264 /***********************************************************************
1265  *           ClassNext      (TOOLHELP.70)
1266  */
1267 BOOL16 WINAPI ClassNext16( CLASSENTRY *pClassEntry )
1268 {
1269     int i;
1270     CLASS *class = firstClass;
1271
1272     TRACE(class,"%p\n",pClassEntry);
1273
1274     if (!pClassEntry->wNext) return FALSE;
1275     for (i = 1; (i < pClassEntry->wNext) && class; i++) class = class->next;
1276     if (!class)
1277     {
1278         pClassEntry->wNext = 0;
1279         return FALSE;
1280     }
1281     pClassEntry->hInst = class->hInstance;
1282     pClassEntry->wNext++;
1283     GlobalGetAtomNameA( class->atomName, pClassEntry->szClassName,
1284                           sizeof(pClassEntry->szClassName) );
1285     return TRUE;
1286 }