windows/class.c

   1 /*
   2  * Window classes functions
   3  *
   4  * Copyright 1993, 1996, 2003 Alexandre Julliard
   5  * Copyright 1998 Juergen Schmied (jsch)
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20  */
  21
  22 #include "config.h"
  23 #include "wine/port.h"
  24
  25 #include <assert.h>
  26 #include <stdarg.h>
  27 #include <stdlib.h>
  28 #include <string.h>
  29
  30 #include "winerror.h"
  31 #include "windef.h"
  32 #include "winbase.h"
  33 #include "wingdi.h"
  34 #include "wine/winuser16.h"
  35 #include "wine/unicode.h"
  36 #include "win.h"
  37 #include "user_private.h"
  38 #include "controls.h"
  39 #include "dce.h"
  40 #include "winproc.h"
  41 #include "wine/server.h"
  42 #include "wine/list.h"
  43 #include "wine/debug.h"
  44
  45 WINE_DEFAULT_DEBUG_CHANNEL(class);
  46
  47 typedef struct tagCLASS
  48 {
  49     struct list      entry;         /* Entry in class list */
  50     UINT             style;         /* Class style */
  51     BOOL             local;         /* Local class? */
  52     WNDPROC          winprocA;      /* Window procedure (ASCII) */
  53     WNDPROC          winprocW;      /* Window procedure (Unicode) */
  54     INT              cbClsExtra;    /* Class extra bytes */
  55     INT              cbWndExtra;    /* Window extra bytes */
  56     LPWSTR           menuName;      /* Default menu name (Unicode followed by ASCII) */
  57     SEGPTR           segMenuName;   /* Default menu name as SEGPTR */
  58     struct tagDCE   *dce;           /* Class DCE (if CS_CLASSDC) */
  59     HINSTANCE        hInstance;     /* Module that created the task */
  60     HICON            hIcon;         /* Default icon */
  61     HICON            hIconSm;       /* Default small icon */
  62     HCURSOR          hCursor;       /* Default cursor */
  63     HBRUSH           hbrBackground; /* Default background */
  64     ATOM             atomName;      /* Name of the class */
  65 } CLASS;
  66
  67 static struct list class_list = LIST_INIT( class_list );
  68 static CLASS *desktop_class;
  69
  70 #define CLASS_OTHER_PROCESS ((CLASS *)1)
  71
  72 /***********************************************************************
  73  *           get_class_ptr
  74  */
  75 static CLASS *get_class_ptr( HWND hwnd, BOOL write_access )
  76 {
  77     WND *ptr = WIN_GetPtr( hwnd );
  78
  79     if (ptr)
  80     {
  81         if (ptr != WND_OTHER_PROCESS) return ptr->class;
  82         if (write_access && IsWindow( hwnd )) /* check other processes */
  83         {
  84             /* modifying classes in other processes is not allowed */
  85             SetLastError( ERROR_ACCESS_DENIED );
  86             return NULL;
  87         }
  88         return CLASS_OTHER_PROCESS;
  89     }
  90     SetLastError( ERROR_INVALID_WINDOW_HANDLE );
  91     return NULL;
  92 }
  93
  94
  95 /***********************************************************************
  96  *           release_class_ptr
  97  */
  98 inline static void release_class_ptr( CLASS *ptr )
  99 {
 100     USER_Unlock();
 101 }
 102
 103
 104 /***********************************************************************
 105  *           set_server_info
 106  *
 107  * Set class info with the wine server.
 108  */
 109 static BOOL set_server_info( HWND hwnd, INT offset, LONG newval )
 110 {
 111     BOOL ret;
 112
 113     SERVER_START_REQ( set_class_info )
 114     {
 115         req->window = hwnd;
 116         req->extra_offset = -1;
 117         switch(offset)
 118         {
 119         case GCW_ATOM:
 120             req->flags = SET_CLASS_ATOM;
 121             req->atom = newval;
 122         case GCL_STYLE:
 123             req->flags = SET_CLASS_STYLE;
 124             req->style = newval;
 125             break;
 126         case GCL_CBWNDEXTRA:
 127             req->flags = SET_CLASS_WINEXTRA;
 128             req->win_extra = newval;
 129             break;
 130         case GCL_HMODULE:
 131             req->flags = SET_CLASS_INSTANCE;
 132             req->instance = (void *)newval;
 133             break;
 134         default:
 135             assert( offset >= 0 );
 136             req->flags = SET_CLASS_EXTRA;
 137             req->extra_offset = offset;
 138             req->extra_size = sizeof(newval);
 139             memcpy( &req->extra_value, &newval, sizeof(newval) );
 140             break;
 141         }
 142         ret = !wine_server_call_err( req );
 143     }
 144     SERVER_END_REQ;
 145     return ret;
 146 }
 147
 148
 149 /***********************************************************************
 150  *           CLASS_GetProc
 151  *
 152  * Get the class winproc for a given proc type
 153  */
 154 static WNDPROC16 CLASS_GetProc( CLASS *classPtr, WINDOWPROCTYPE type )
 155 {
 156     WNDPROC proc = classPtr->winprocA;
 157
 158     if (classPtr->winprocW)
 159     {
 160         /* if we have a Unicode proc, use it if we have no ASCII proc
 161          * or if we have both and Unicode was requested
 162          */
 163         if (!proc || type == WIN_PROC_32W) proc = classPtr->winprocW;
 164     }
 165     return WINPROC_GetProc( proc, type );
 166 }
 167
 168
 169 /***********************************************************************
 170  *           CLASS_SetProc
 171  *
 172  * Set the class winproc for a given proc type.
 173  * Returns the previous window proc.
 174  */
 175 static WNDPROC16 CLASS_SetProc( CLASS *classPtr, WNDPROC newproc, WINDOWPROCTYPE type )
 176 {
 177     WNDPROC *proc = &classPtr->winprocA;
 178     WNDPROC16 ret;
 179
 180     if (classPtr->winprocW)
 181     {
 182         /* if we have a Unicode proc, use it if we have no ASCII proc
 183          * or if we have both and Unicode was requested
 184          */
 185         if (!*proc || type == WIN_PROC_32W) proc = &classPtr->winprocW;
 186     }
 187     ret = WINPROC_GetProc( *proc, type );
 188     *proc = WINPROC_AllocProc( newproc, type );
 189     /* now clear the one that we didn't set */
 190     if (classPtr->winprocA && classPtr->winprocW)
 191     {
 192         if (proc == &classPtr->winprocA)
 193             classPtr->winprocW = 0;
 194         else
 195             classPtr->winprocA = 0;
 196     }
 197     return ret;
 198 }
 199
 200
 201 /***********************************************************************
 202  *           CLASS_GetMenuNameA
 203  *
 204  * Get the menu name as a ASCII string.
 205  */
 206 inline static LPSTR CLASS_GetMenuNameA( CLASS *classPtr )
 207 {
 208     if (!HIWORD(classPtr->menuName)) return (LPSTR)classPtr->menuName;
 209     return (LPSTR)(classPtr->menuName + strlenW(classPtr->menuName) + 1);
 210 }
 211
 212
 213 /***********************************************************************
 214  *           CLASS_GetMenuName16
 215  *
 216  * Get the menu name as a SEGPTR.
 217  */
 218 inline static SEGPTR CLASS_GetMenuName16( CLASS *classPtr )
 219 {
 220     if (!HIWORD(classPtr->menuName)) return (SEGPTR)classPtr->menuName;
 221     if (!classPtr->segMenuName)
 222         classPtr->segMenuName = MapLS( CLASS_GetMenuNameA(classPtr) );
 223     return classPtr->segMenuName;
 224 }
 225
 226
 227 /***********************************************************************
 228  *           CLASS_GetMenuNameW
 229  *
 230  * Get the menu name as a Unicode string.
 231  */
 232 inline static LPWSTR CLASS_GetMenuNameW( CLASS *classPtr )
 233 {
 234     return classPtr->menuName;
 235 }
 236
 237
 238 /***********************************************************************
 239  *           CLASS_SetMenuNameA
 240  *
 241  * Set the menu name in a class structure by copying the string.
 242  */
 243 static void CLASS_SetMenuNameA( CLASS *classPtr, LPCSTR name )
 244 {
 245     UnMapLS( classPtr->segMenuName );
 246     classPtr->segMenuName = 0;
 247     if (HIWORD(classPtr->menuName)) HeapFree( GetProcessHeap(), 0, classPtr->menuName );
 248     if (HIWORD(name))
 249     {
 250         DWORD lenA = strlen(name) + 1;
 251         DWORD lenW = MultiByteToWideChar( CP_ACP, 0, name, lenA, NULL, 0 );
 252         classPtr->menuName = HeapAlloc( GetProcessHeap(), 0, lenA + lenW*sizeof(WCHAR) );
 253         MultiByteToWideChar( CP_ACP, 0, name, lenA, classPtr->menuName, lenW );
 254         memcpy( classPtr->menuName + lenW, name, lenA );
 255     }
 256     else classPtr->menuName = (LPWSTR)name;
 257 }
 258
 259
 260 /***********************************************************************
 261  *           CLASS_SetMenuNameW
 262  *
 263  * Set the menu name in a class structure by copying the string.
 264  */
 265 static void CLASS_SetMenuNameW( CLASS *classPtr, LPCWSTR name )
 266 {
 267     UnMapLS( classPtr->segMenuName );
 268     classPtr->segMenuName = 0;
 269     if (HIWORD(classPtr->menuName)) HeapFree( GetProcessHeap(), 0, classPtr->menuName );
 270     if (HIWORD(name))
 271     {
 272         DWORD lenW = strlenW(name) + 1;
 273         DWORD lenA = WideCharToMultiByte( CP_ACP, 0, name, lenW, NULL, 0, NULL, NULL );
 274         classPtr->menuName = HeapAlloc( GetProcessHeap(), 0, lenA + lenW*sizeof(WCHAR) );
 275         memcpy( classPtr->menuName, name, lenW*sizeof(WCHAR) );
 276         WideCharToMultiByte( CP_ACP, 0, name, lenW,
 277                              (char *)(classPtr->menuName + lenW), lenA, NULL, NULL );
 278     }
 279     else classPtr->menuName = (LPWSTR)name;
 280 }
 281
 282
 283 /***********************************************************************
 284  *           CLASS_FreeClass
 285  *
 286  * Free a class structure.
 287  */
 288 static void CLASS_FreeClass( CLASS *classPtr )
 289 {
 290     TRACE("%p\n", classPtr);
 291
 292     USER_Lock();
 293
 294     list_remove( &classPtr->entry );
 295     if (classPtr->dce) DCE_FreeDCE( classPtr->dce );
 296     if (classPtr->hbrBackground > (HBRUSH)(COLOR_GRADIENTINACTIVECAPTION + 1))
 297         DeleteObject( classPtr->hbrBackground );
 298     UnMapLS( classPtr->segMenuName );
 299     HeapFree( GetProcessHeap(), 0, classPtr->menuName );
 300     HeapFree( GetProcessHeap(), 0, classPtr );
 301     USER_Unlock();
 302 }
 303
 304
 305 /***********************************************************************
 306  *           CLASS_FreeModuleClasses
 307  */
 308 void CLASS_FreeModuleClasses( HMODULE16 hModule )
 309 {
 310     struct list *ptr, *next;
 311
 312     TRACE("0x%08x\n", hModule);
 313
 314     USER_Lock();
 315     for (ptr = list_head( &class_list ); ptr; ptr = next)
 316     {
 317         CLASS *class = LIST_ENTRY( ptr, CLASS, entry );
 318         next = list_next( &class_list, ptr );
 319         if (class->hInstance == HINSTANCE_32(hModule))
 320         {
 321             BOOL ret;
 322
 323             SERVER_START_REQ( destroy_class )
 324             {
 325                 req->atom = class->atomName;
 326                 req->instance = class->hInstance;
 327                 ret = !wine_server_call_err( req );
 328             }
 329             SERVER_END_REQ;
 330             if (ret) CLASS_FreeClass( class );
 331         }
 332     }
 333     USER_Unlock();
 334 }
 335
 336
 337 /***********************************************************************
 338  *           CLASS_FindClassByAtom
 339  *
 340  * Return a pointer to the class.
 341  * hinstance has been normalized by the caller.
 342  */
 343 static CLASS *CLASS_FindClassByAtom( ATOM atom, HINSTANCE hinstance )
 344 {
 345     struct list *ptr;
 346
 347     USER_Lock();
 348
 349     LIST_FOR_EACH( ptr, &class_list )
 350     {
 351         CLASS *class = LIST_ENTRY( ptr, CLASS, entry );
 352         if (class->atomName != atom) continue;
 353         if (!hinstance || !class->local || class->hInstance == hinstance)
 354         {
 355             TRACE("0x%04x %p -> %p\n", atom, hinstance, class);
 356             return class;
 357         }
 358     }
 359     USER_Unlock();
 360     TRACE("0x%04x %p -> not found\n", atom, hinstance);
 361     return NULL;
 362 }
 363
 364
 365 /***********************************************************************
 366  *           CLASS_RegisterClass
 367  *
 368  * The real RegisterClass() functionality.
 369  * The atom is deleted no matter what.
 370  */
 371 static CLASS *CLASS_RegisterClass( ATOM atom, HINSTANCE hInstance, BOOL local,
 372                                    DWORD style, INT classExtra, INT winExtra )
 373 {
 374     CLASS *classPtr;
 375     BOOL ret;
 376
 377     TRACE("atom=0x%x hinst=%p style=0x%lx clExtr=0x%x winExtr=0x%x\n",
 378           atom, hInstance, style, classExtra, winExtra );
 379
 380     /* Fix the extra bytes value */
 381
 382     if (classExtra < 0) classExtra = 0;
 383     else if (classExtra > 40)  /* Extra bytes are limited to 40 in Win32 */
 384         WARN("Class extra bytes %d is > 40\n", classExtra);
 385     if (winExtra < 0) winExtra = 0;
 386     else if (winExtra > 40)    /* Extra bytes are limited to 40 in Win32 */
 387         WARN("Win extra bytes %d is > 40\n", winExtra );
 388
 389     classPtr = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(CLASS) + classExtra );
 390     if (!classPtr)
 391     {
 392         GlobalDeleteAtom( atom );
 393         return NULL;
 394     }
 395
 396     SERVER_START_REQ( create_class )
 397     {
 398         req->local      = local;
 399         req->atom       = atom;
 400         req->style      = style;
 401         req->instance   = hInstance;
 402         req->extra      = classExtra;
 403         req->win_extra  = winExtra;
 404         req->client_ptr = classPtr;
 405         ret = !wine_server_call_err( req );
 406     }
 407     SERVER_END_REQ;
 408     GlobalDeleteAtom( atom );  /* the server increased the atom ref count */
 409     if (!ret)
 410     {
 411         HeapFree( GetProcessHeap(), 0, classPtr );
 412         return NULL;
 413     }
 414
 415     classPtr->style       = style;
 416     classPtr->local       = local;
 417     classPtr->cbWndExtra  = winExtra;
 418     classPtr->cbClsExtra  = classExtra;
 419     classPtr->hInstance   = hInstance;
 420     classPtr->atomName    = atom;
 421     classPtr->dce         = (style & CS_CLASSDC) ? DCE_AllocDCE( 0, DCE_CLASS_DC ) : NULL;
 422
 423     /* Other non-null values must be set by caller */
 424
 425     USER_Lock();
 426     if (local) list_add_head( &class_list, &classPtr->entry );
 427     else list_add_tail( &class_list, &classPtr->entry );
 428     return classPtr;
 429 }
 430
 431
 432 /***********************************************************************
 433  *           register_builtin
 434  *
 435  * Register a builtin control class.
 436  * This allows having both ASCII and Unicode winprocs for the same class.
 437  */
 438 static CLASS *register_builtin( const struct builtin_class_descr *descr )
 439 {
 440     ATOM atom;
 441     CLASS *classPtr;
 442
 443     if (!(atom = GlobalAddAtomA( descr->name ))) return 0;
 444
 445     if (!(classPtr = CLASS_RegisterClass( atom, user32_module, FALSE,
 446                                           descr->style, 0, descr->extra ))) return 0;
 447
 448     classPtr->hCursor       = LoadCursorA( 0, (LPSTR)descr->cursor );
 449     classPtr->hbrBackground = descr->brush;
 450
 451     if (descr->procA) classPtr->winprocA = WINPROC_AllocProc( descr->procA, WIN_PROC_32A );
 452     if (descr->procW) classPtr->winprocW = WINPROC_AllocProc( descr->procW, WIN_PROC_32W );
 453     release_class_ptr( classPtr );
 454     return classPtr;
 455 }
 456
 457
 458 /***********************************************************************
 459  *           CLASS_RegisterBuiltinClasses
 460  */
 461 void CLASS_RegisterBuiltinClasses(void)
 462 {
 463     extern const struct builtin_class_descr BUTTON_builtin_class;
 464     extern const struct builtin_class_descr COMBO_builtin_class;
 465     extern const struct builtin_class_descr COMBOLBOX_builtin_class;
 466     extern const struct builtin_class_descr DIALOG_builtin_class;
 467     extern const struct builtin_class_descr DESKTOP_builtin_class;
 468     extern const struct builtin_class_descr EDIT_builtin_class;
 469     extern const struct builtin_class_descr ICONTITLE_builtin_class;
 470     extern const struct builtin_class_descr LISTBOX_builtin_class;
 471     extern const struct builtin_class_descr MDICLIENT_builtin_class;
 472     extern const struct builtin_class_descr MENU_builtin_class;
 473     extern const struct builtin_class_descr SCROLL_builtin_class;
 474     extern const struct builtin_class_descr STATIC_builtin_class;
 475
 476     desktop_class = register_builtin( &DESKTOP_builtin_class );
 477     register_builtin( &BUTTON_builtin_class );
 478     register_builtin( &COMBO_builtin_class );
 479     register_builtin( &COMBOLBOX_builtin_class );
 480     register_builtin( &DIALOG_builtin_class );
 481     register_builtin( &EDIT_builtin_class );
 482     register_builtin( &ICONTITLE_builtin_class );
 483     register_builtin( &LISTBOX_builtin_class );
 484     register_builtin( &MDICLIENT_builtin_class );
 485     register_builtin( &MENU_builtin_class );
 486     register_builtin( &SCROLL_builtin_class );
 487     register_builtin( &STATIC_builtin_class );
 488 }
 489
 490
 491 /***********************************************************************
 492  *           CLASS_AddWindow
 493  *
 494  * Add a new window using this class, and set the necessary
 495  * information inside the window structure.
 496  */
 497 void CLASS_AddWindow( CLASS *class, WND *win, WINDOWPROCTYPE type )
 498 {
 499     if (!class) class = desktop_class;
 500
 501     if (type == WIN_PROC_32W)
 502     {
 503         if (!(win->winproc = class->winprocW)) win->winproc = class->winprocA;
 504     }
 505     else
 506     {
 507         if (!(win->winproc = class->winprocA)) win->winproc = class->winprocW;
 508     }
 509     win->class    = class;
 510     win->clsStyle = class->style;
 511     win->dce      = class->dce;
 512 }
 513
 514
 515 /***********************************************************************
 516  *              RegisterClassA (USER32.@)
 517  * RETURNS
 518  *      >0: Unique identifier
 519  *      0: Failure
 520  */
 521 ATOM WINAPI RegisterClassA( const WNDCLASSA* wc ) /* [in] Address of structure with class data */
 522 {
 523     WNDCLASSEXA wcex;
 524
 525     wcex.cbSize        = sizeof(wcex);
 526     wcex.style         = wc->style;
 527     wcex.lpfnWndProc   = wc->lpfnWndProc;
 528     wcex.cbClsExtra    = wc->cbClsExtra;
 529     wcex.cbWndExtra    = wc->cbWndExtra;
 530     wcex.hInstance     = wc->hInstance;
 531     wcex.hIcon         = wc->hIcon;
 532     wcex.hCursor       = wc->hCursor;
 533     wcex.hbrBackground = wc->hbrBackground;
 534     wcex.lpszMenuName  = wc->lpszMenuName;
 535     wcex.lpszClassName = wc->lpszClassName;
 536     wcex.hIconSm       = 0;
 537     return RegisterClassExA( &wcex );
 538 }
 539
 540
 541 /***********************************************************************
 542  *              RegisterClassW (USER32.@)
 543  */
 544 ATOM WINAPI RegisterClassW( const WNDCLASSW* wc )
 545 {
 546     WNDCLASSEXW wcex;
 547
 548     wcex.cbSize        = sizeof(wcex);
 549     wcex.style         = wc->style;
 550     wcex.lpfnWndProc   = wc->lpfnWndProc;
 551     wcex.cbClsExtra    = wc->cbClsExtra;
 552     wcex.cbWndExtra    = wc->cbWndExtra;
 553     wcex.hInstance     = wc->hInstance;
 554     wcex.hIcon         = wc->hIcon;
 555     wcex.hCursor       = wc->hCursor;
 556     wcex.hbrBackground = wc->hbrBackground;
 557     wcex.lpszMenuName  = wc->lpszMenuName;
 558     wcex.lpszClassName = wc->lpszClassName;
 559     wcex.hIconSm       = 0;
 560     return RegisterClassExW( &wcex );
 561 }
 562
 563
 564 /***********************************************************************
 565  *              RegisterClassExA (USER32.@)
 566  */
 567 ATOM WINAPI RegisterClassExA( const WNDCLASSEXA* wc )
 568 {
 569     ATOM atom;
 570     CLASS *classPtr;
 571     HINSTANCE instance;
 572
 573     if (wc->hInstance == user32_module)
 574     {
 575         /* we can't register a class for user32 */
 576         SetLastError( ERROR_INVALID_PARAMETER );
 577         return 0;
 578     }
 579     if (!(instance = wc->hInstance)) instance = GetModuleHandleW( NULL );
 580
 581     if (!(atom = GlobalAddAtomA( wc->lpszClassName ))) return 0;
 582
 583     if (!(classPtr = CLASS_RegisterClass( atom, instance, !(wc->style & CS_GLOBALCLASS),
 584                                           wc->style, wc->cbClsExtra, wc->cbWndExtra )))
 585         return 0;
 586
 587     TRACE("atom=%04x wndproc=%p hinst=%p bg=%p style=%08x clsExt=%d winExt=%d class=%p\n",
 588           atom, wc->lpfnWndProc, instance, wc->hbrBackground,
 589           wc->style, wc->cbClsExtra, wc->cbWndExtra, classPtr );
 590
 591     classPtr->hIcon         = wc->hIcon;
 592     classPtr->hIconSm       = wc->hIconSm;
 593     classPtr->hCursor       = wc->hCursor;
 594     classPtr->hbrBackground = wc->hbrBackground;
 595     classPtr->winprocA      = WINPROC_AllocProc( wc->lpfnWndProc, WIN_PROC_32A );
 596     CLASS_SetMenuNameA( classPtr, wc->lpszMenuName );
 597     release_class_ptr( classPtr );
 598     return atom;
 599 }
 600
 601
 602 /***********************************************************************
 603  *              RegisterClassExW (USER32.@)
 604  */
 605 ATOM WINAPI RegisterClassExW( const WNDCLASSEXW* wc )
 606 {
 607     ATOM atom;
 608     CLASS *classPtr;
 609     HINSTANCE instance;
 610
 611     if (wc->hInstance == user32_module)
 612     {
 613         /* we can't register a class for user32 */
 614         SetLastError( ERROR_INVALID_PARAMETER );
 615         return 0;
 616     }
 617     if (!(instance = wc->hInstance)) instance = GetModuleHandleW( NULL );
 618
 619     if (!(atom = GlobalAddAtomW( wc->lpszClassName ))) return 0;
 620
 621     if (!(classPtr = CLASS_RegisterClass( atom, instance, !(wc->style & CS_GLOBALCLASS),
 622                                           wc->style, wc->cbClsExtra, wc->cbWndExtra )))
 623         return 0;
 624
 625     TRACE("atom=%04x wndproc=%p hinst=%p bg=%p style=%08x clsExt=%d winExt=%d class=%p\n",
 626           atom, wc->lpfnWndProc, instance, wc->hbrBackground,
 627           wc->style, wc->cbClsExtra, wc->cbWndExtra, classPtr );
 628
 629     classPtr->hIcon         = wc->hIcon;
 630     classPtr->hIconSm       = wc->hIconSm;
 631     classPtr->hCursor       = wc->hCursor;
 632     classPtr->hbrBackground = wc->hbrBackground;
 633     classPtr->winprocW      = WINPROC_AllocProc( wc->lpfnWndProc, WIN_PROC_32W );
 634     CLASS_SetMenuNameW( classPtr, wc->lpszMenuName );
 635     release_class_ptr( classPtr );
 636     return atom;
 637 }
 638
 639
 640 /***********************************************************************
 641  *              UnregisterClassA (USER32.@)
 642  */
 643 BOOL WINAPI UnregisterClassA( LPCSTR className, HINSTANCE hInstance )
 644 {
 645     ATOM atom = HIWORD(className) ? GlobalFindAtomA( className ) : LOWORD(className);
 646     return UnregisterClassW( MAKEINTATOMW(atom), hInstance );
 647 }
 648
 649 /***********************************************************************
 650  *              UnregisterClassW (USER32.@)
 651  */
 652 BOOL WINAPI UnregisterClassW( LPCWSTR className, HINSTANCE hInstance )
 653 {
 654     CLASS *classPtr = NULL;
 655     ATOM atom = HIWORD(className) ? GlobalFindAtomW( className ) : LOWORD(className);
 656
 657     TRACE("%s %p %x\n",debugstr_w(className), hInstance, atom);
 658
 659     if (!atom)
 660     {
 661         SetLastError( ERROR_CLASS_DOES_NOT_EXIST );
 662         return FALSE;
 663     }
 664
 665     SERVER_START_REQ( destroy_class )
 666     {
 667         req->atom = atom;
 668         req->instance = hInstance;
 669         if (!wine_server_call_err( req )) classPtr = reply->client_ptr;
 670     }
 671     SERVER_END_REQ;
 672
 673     if (classPtr) CLASS_FreeClass( classPtr );
 674     return (classPtr != NULL);
 675 }
 676
 677
 678 /***********************************************************************
 679  *              GetClassWord (USER32.@)
 680  */
 681 WORD WINAPI GetClassWord( HWND hwnd, INT offset )
 682 {
 683     CLASS *class;
 684     WORD retvalue = 0;
 685
 686     if (offset < 0) return GetClassLongA( hwnd, offset );
 687
 688     TRACE("%p %x\n",hwnd, offset);
 689
 690     if (!(class = get_class_ptr( hwnd, FALSE ))) return 0;
 691
 692     if (class == CLASS_OTHER_PROCESS)
 693     {
 694         SERVER_START_REQ( set_class_info )
 695         {
 696             req->window = hwnd;
 697             req->flags = 0;
 698             req->extra_offset = offset;
 699             req->extra_size = sizeof(retvalue);
 700             if (!wine_server_call_err( req ))
 701                 memcpy( &retvalue, &reply->old_extra_value, sizeof(retvalue) );
 702         }
 703         SERVER_END_REQ;
 704         return retvalue;
 705     }
 706
 707     if (offset <= class->cbClsExtra - sizeof(WORD))
 708         memcpy( &retvalue, (char *)(class + 1) + offset, sizeof(retvalue) );
 709     else
 710         SetLastError( ERROR_INVALID_INDEX );
 711     release_class_ptr( class );
 712     return retvalue;
 713 }
 714
 715
 716 /***********************************************************************
 717  *              GetClassLong (USER.131)
 718  */
 719 LONG WINAPI GetClassLong16( HWND16 hwnd16, INT16 offset )
 720 {
 721     CLASS *class;
 722     LONG ret;
 723     HWND hwnd = (HWND)(ULONG_PTR)hwnd16;  /* no need for full handle */
 724
 725     TRACE("%p %d\n",hwnd, offset);
 726
 727     switch( offset )
 728     {
 729     case GCL_WNDPROC:
 730         if (!(class = get_class_ptr( hwnd, FALSE ))) return 0;
 731         if (class == CLASS_OTHER_PROCESS) break;
 732         ret = (LONG)CLASS_GetProc( class, WIN_PROC_16 );
 733         release_class_ptr( class );
 734         return ret;
 735     case GCL_MENUNAME:
 736         if (!(class = get_class_ptr( hwnd, FALSE ))) return 0;
 737         if (class == CLASS_OTHER_PROCESS) break;
 738         ret = (LONG)CLASS_GetMenuName16( class );
 739         release_class_ptr( class );
 740         return ret;
 741     default:
 742         return GetClassLongA( hwnd, offset );
 743     }
 744     FIXME( "offset %d not supported on other process window %p\n", offset, hwnd );
 745     SetLastError( ERROR_INVALID_HANDLE );
 746     return 0;
 747 }
 748
 749
 750 /***********************************************************************
 751  *              GetClassLongW (USER32.@)
 752  */
 753 LONG WINAPI GetClassLongW( HWND hwnd, INT offset )
 754 {
 755     CLASS *class;
 756     LONG retvalue = 0;
 757
 758     TRACE("%p %d\n", hwnd, offset);
 759
 760     if (!(class = get_class_ptr( hwnd, FALSE ))) return 0;
 761
 762     if (class == CLASS_OTHER_PROCESS)
 763     {
 764         SERVER_START_REQ( set_class_info )
 765         {
 766             req->window = hwnd;
 767             req->flags = 0;
 768             req->extra_offset = (offset >= 0) ? offset : -1;
 769             req->extra_size = (offset >= 0) ? sizeof(retvalue) : 0;
 770             if (!wine_server_call_err( req ))
 771             {
 772                 switch(offset)
 773                 {
 774                 case GCL_HBRBACKGROUND:
 775                 case GCL_HCURSOR:
 776                 case GCL_HICON:
 777                 case GCL_HICONSM:
 778                 case GCL_WNDPROC:
 779                 case GCL_MENUNAME:
 780                     FIXME( "offset %d not supported on other process window %p\n", offset, hwnd );
 781                     SetLastError( ERROR_INVALID_HANDLE );
 782                     break;
 783                 case GCL_STYLE:
 784                     retvalue = reply->old_style;
 785                     break;
 786                 case GCL_CBWNDEXTRA:
 787                     retvalue = reply->old_win_extra;
 788                     break;
 789                 case GCL_CBCLSEXTRA:
 790                     retvalue = reply->old_extra;
 791                     break;
 792                 case GCL_HMODULE:
 793                     retvalue = (LONG)reply->old_instance;
 794                     break;
 795                 case GCW_ATOM:
 796                     retvalue = reply->old_atom;
 797                     break;
 798                 default:
 799                     if (offset >= 0) memcpy( &retvalue, &reply->old_extra_value, sizeof(retvalue) );
 800                     else SetLastError( ERROR_INVALID_INDEX );
 801                     break;
 802                 }
 803             }
 804         }
 805         SERVER_END_REQ;
 806         return retvalue;
 807     }
 808
 809     if (offset >= 0)
 810     {
 811         if (offset <= class->cbClsExtra - sizeof(LONG))
 812             memcpy( &retvalue, (char *)(class + 1) + offset, sizeof(retvalue) );
 813         else
 814             SetLastError( ERROR_INVALID_INDEX );
 815         release_class_ptr( class );
 816         return retvalue;
 817     }
 818
 819     switch(offset)
 820     {
 821     case GCL_HBRBACKGROUND:
 822         retvalue = (LONG)class->hbrBackground;
 823         break;
 824     case GCL_HCURSOR:
 825         retvalue = (LONG)class->hCursor;
 826         break;
 827     case GCL_HICON:
 828         retvalue = (LONG)class->hIcon;
 829         break;
 830     case GCL_HICONSM:
 831         retvalue = (LONG)class->hIconSm;
 832         break;
 833     case GCL_STYLE:
 834         retvalue = (LONG)class->style;
 835         break;
 836     case GCL_CBWNDEXTRA:
 837         retvalue = (LONG)class->cbWndExtra;
 838         break;
 839     case GCL_CBCLSEXTRA:
 840         retvalue = (LONG)class->cbClsExtra;
 841         break;
 842     case GCL_HMODULE:
 843         retvalue = (LONG)class->hInstance;
 844         break;
 845     case GCL_WNDPROC:
 846         retvalue = (LONG)CLASS_GetProc( class, WIN_PROC_32W );
 847         break;
 848     case GCL_MENUNAME:
 849         retvalue = (LONG)CLASS_GetMenuNameW( class );
 850         break;
 851     case GCW_ATOM:
 852         retvalue = (DWORD)class->atomName;
 853         break;
 854     default:
 855         SetLastError( ERROR_INVALID_INDEX );
 856         break;
 857     }
 858     release_class_ptr( class );
 859     return retvalue;
 860 }
 861
 862
 863 /***********************************************************************
 864  *              GetClassLongA (USER32.@)
 865  */
 866 LONG WINAPI GetClassLongA( HWND hwnd, INT offset )
 867 {
 868     CLASS *class;
 869     LONG retvalue;
 870
 871     if (offset != GCL_WNDPROC && offset != GCL_MENUNAME)
 872         return GetClassLongW( hwnd, offset );
 873
 874     TRACE("%p %d\n", hwnd, offset);
 875
 876     if (!(class = get_class_ptr( hwnd, FALSE ))) return 0;
 877
 878     if (class == CLASS_OTHER_PROCESS)
 879     {
 880         FIXME( "offset %d not supported on other process window %p\n", offset, hwnd );
 881         SetLastError( ERROR_INVALID_HANDLE );
 882         return 0;
 883     }
 884
 885     if (offset == GCL_WNDPROC)
 886         retvalue = (LONG)CLASS_GetProc( class, WIN_PROC_32A );
 887     else  /* GCL_MENUNAME */
 888         retvalue = (LONG)CLASS_GetMenuNameA( class );
 889
 890     release_class_ptr( class );
 891     return retvalue;
 892 }
 893
 894
 895 /***********************************************************************
 896  *              SetClassWord (USER32.@)
 897  */
 898 WORD WINAPI SetClassWord( HWND hwnd, INT offset, WORD newval )
 899 {
 900     CLASS *class;
 901     WORD retval = 0;
 902
 903     if (offset < 0) return SetClassLongA( hwnd, offset, (DWORD)newval );
 904
 905     TRACE("%p %d %x\n", hwnd, offset, newval);
 906
 907     if (!(class = get_class_ptr( hwnd, TRUE ))) return 0;
 908
 909     SERVER_START_REQ( set_class_info )
 910     {
 911         req->window = hwnd;
 912         req->flags = SET_CLASS_EXTRA;
 913         req->extra_offset = offset;
 914         req->extra_size = sizeof(newval);
 915         memcpy( &req->extra_value, &newval, sizeof(newval) );
 916         if (!wine_server_call_err( req ))
 917         {
 918             void *ptr = (char *)(class + 1) + offset;
 919             memcpy( &retval, ptr, sizeof(retval) );
 920             memcpy( ptr, &newval, sizeof(newval) );
 921         }
 922     }
 923     SERVER_END_REQ;
 924     release_class_ptr( class );
 925     return retval;
 926 }
 927
 928
 929 /***********************************************************************
 930  *              SetClassLong (USER.132)
 931  */
 932 LONG WINAPI SetClassLong16( HWND16 hwnd16, INT16 offset, LONG newval )
 933 {
 934     CLASS *class;
 935     LONG retval;
 936     HWND hwnd = (HWND)(ULONG_PTR)hwnd16;  /* no need for full handle */
 937
 938     TRACE("%p %d %lx\n", hwnd, offset, newval);
 939
 940     switch(offset)
 941     {
 942     case GCL_WNDPROC:
 943         if (!(class = get_class_ptr( hwnd, TRUE ))) return 0;
 944         retval = (LONG)CLASS_SetProc( class, (WNDPROC)newval, WIN_PROC_16 );
 945         release_class_ptr( class );
 946         return retval;
 947     case GCL_MENUNAME:
 948         newval = (LONG)MapSL( newval );
 949         /* fall through */
 950     default:
 951         return SetClassLongA( hwnd, offset, newval );
 952     }
 953 }
 954
 955
 956 /***********************************************************************
 957  *              SetClassLongW (USER32.@)
 958  */
 959 LONG WINAPI SetClassLongW( HWND hwnd, INT offset, LONG newval )
 960 {
 961     CLASS *class;
 962     LONG retval = 0;
 963
 964     TRACE("%p %d %lx\n", hwnd, offset, newval);
 965
 966     if (!(class = get_class_ptr( hwnd, TRUE ))) return 0;
 967
 968     if (offset >= 0)
 969     {
 970         if (set_server_info( hwnd, offset, newval ))
 971         {
 972             void *ptr = (char *)(class + 1) + offset;
 973             memcpy( &retval, ptr, sizeof(retval) );
 974             memcpy( ptr, &newval, sizeof(newval) );
 975         }
 976     }
 977     else switch(offset)
 978     {
 979     case GCL_MENUNAME:
 980         CLASS_SetMenuNameW( class, (LPCWSTR)newval );
 981         retval = 0;  /* Old value is now meaningless anyway */
 982         break;
 983     case GCL_WNDPROC:
 984         retval = (LONG)CLASS_SetProc( class, (WNDPROC)newval, WIN_PROC_32W );
 985         break;
 986     case GCL_HBRBACKGROUND:
 987         retval = (LONG)class->hbrBackground;
 988         class->hbrBackground = (HBRUSH)newval;
 989         break;
 990     case GCL_HCURSOR:
 991         retval = (LONG)class->hCursor;
 992         class->hCursor = (HCURSOR)newval;
 993         break;
 994     case GCL_HICON:
 995         retval = (LONG)class->hIcon;
 996         class->hIcon = (HICON)newval;
 997         break;
 998     case GCL_HICONSM:
 999         retval = (LONG)class->hIconSm;
1000         class->hIconSm = (HICON)newval;
1001         break;
1002     case GCL_STYLE:
1003         if (!set_server_info( hwnd, offset, newval )) break;
1004         retval = (LONG)class->style;
1005         class->style = newval;
1006         break;
1007     case GCL_CBWNDEXTRA:
1008         if (!set_server_info( hwnd, offset, newval )) break;
1009         retval = (LONG)class->cbWndExtra;
1010         class->cbWndExtra = newval;
1011         break;
1012     case GCL_HMODULE:
1013         if (!set_server_info( hwnd, offset, newval )) break;
1014         retval = (LONG)class->hInstance;
1015         class->hInstance = (HINSTANCE)newval;
1016         break;
1017     case GCW_ATOM:
1018         if (!set_server_info( hwnd, offset, newval )) break;
1019         retval = (DWORD)class->atomName;
1020         class->atomName = newval;
1021         break;
1022     case GCL_CBCLSEXTRA:  /* cannot change this one */
1023         SetLastError( ERROR_INVALID_PARAMETER );
1024         break;
1025     default:
1026         SetLastError( ERROR_INVALID_INDEX );
1027         break;
1028     }
1029     release_class_ptr( class );
1030     return retval;
1031 }
1032
1033
1034 /***********************************************************************
1035  *              SetClassLongA (USER32.@)
1036  */
1037 LONG WINAPI SetClassLongA( HWND hwnd, INT offset, LONG newval )
1038 {
1039     CLASS *class;
1040     LONG retval;
1041
1042     if (offset != GCL_WNDPROC && offset != GCL_MENUNAME)
1043         return SetClassLongW( hwnd, offset, newval );
1044
1045     TRACE("%p %d %lx\n", hwnd, offset, newval);
1046
1047     if (!(class = get_class_ptr( hwnd, TRUE ))) return 0;
1048
1049     if (offset == GCL_WNDPROC)
1050         retval = (LONG)CLASS_SetProc( class, (WNDPROC)newval, WIN_PROC_32A );
1051     else  /* GCL_MENUNAME */
1052     {
1053         CLASS_SetMenuNameA( class, (LPCSTR)newval );
1054         retval = 0;  /* Old value is now meaningless anyway */
1055     }
1056     release_class_ptr( class );
1057     return retval;
1058 }
1059
1060
1061 /***********************************************************************
1062  *              GetClassNameA (USER32.@)
1063  */
1064 INT WINAPI GetClassNameA( HWND hwnd, LPSTR buffer, INT count )
1065 {
1066     INT ret = GlobalGetAtomNameA( GetClassLongA( hwnd, GCW_ATOM ), buffer, count );
1067
1068     TRACE("%p %s %x\n",hwnd, debugstr_a(buffer), count);
1069     return ret;
1070 }
1071
1072
1073 /***********************************************************************
1074  *              GetClassNameW (USER32.@)
1075  */
1076 INT WINAPI GetClassNameW( HWND hwnd, LPWSTR buffer, INT count )
1077 {
1078     INT ret = GlobalGetAtomNameW( GetClassLongW( hwnd, GCW_ATOM ), buffer, count );
1079
1080     TRACE("%p %s %x\n",hwnd, debugstr_w(buffer), count);
1081     return ret;
1082 }
1083
1084
1085 /***********************************************************************
1086  *              RealGetWindowClassA (USER32.@)
1087  */
1088 UINT WINAPI RealGetWindowClassA( HWND hwnd, LPSTR buffer, UINT count )
1089 {
1090     return GetClassNameA( hwnd, buffer, count );
1091 }
1092
1093
1094 /***********************************************************************
1095  *              RealGetWindowClassW (USER32.@)
1096  */
1097 UINT WINAPI RealGetWindowClassW( HWND hwnd, LPWSTR buffer, UINT count )
1098 {
1099     return GetClassNameW( hwnd, buffer, count );
1100 }
1101
1102
1103 /***********************************************************************
1104  *              GetClassInfoA (USER32.@)
1105  */
1106 BOOL WINAPI GetClassInfoA( HINSTANCE hInstance, LPCSTR name, WNDCLASSA *wc )
1107 {
1108     WNDCLASSEXA wcex;
1109     UINT ret = GetClassInfoExA( hInstance, name, &wcex );
1110
1111     if (ret)
1112     {
1113         wc->style         = wcex.style;
1114         wc->lpfnWndProc   = wcex.lpfnWndProc;
1115         wc->cbClsExtra    = wcex.cbClsExtra;
1116         wc->cbWndExtra    = wcex.cbWndExtra;
1117         wc->hInstance     = wcex.hInstance;
1118         wc->hIcon         = wcex.hIcon;
1119         wc->hCursor       = wcex.hCursor;
1120         wc->hbrBackground = wcex.hbrBackground;
1121         wc->lpszMenuName  = wcex.lpszMenuName;
1122         wc->lpszClassName = wcex.lpszClassName;
1123     }
1124     return ret;
1125 }
1126
1127
1128 /***********************************************************************
1129  *              GetClassInfoW (USER32.@)
1130  */
1131 BOOL WINAPI GetClassInfoW( HINSTANCE hInstance, LPCWSTR name, WNDCLASSW *wc )
1132 {
1133     WNDCLASSEXW wcex;
1134     UINT ret = GetClassInfoExW( hInstance, name, &wcex );
1135
1136     if (ret)
1137     {
1138         wc->style         = wcex.style;
1139         wc->lpfnWndProc   = wcex.lpfnWndProc;
1140         wc->cbClsExtra    = wcex.cbClsExtra;
1141         wc->cbWndExtra    = wcex.cbWndExtra;
1142         wc->hInstance     = wcex.hInstance;
1143         wc->hIcon         = wcex.hIcon;
1144         wc->hCursor       = wcex.hCursor;
1145         wc->hbrBackground = wcex.hbrBackground;
1146         wc->lpszMenuName  = wcex.lpszMenuName;
1147         wc->lpszClassName = wcex.lpszClassName;
1148     }
1149     return ret;
1150 }
1151
1152
1153 /***********************************************************************
1154  *              GetClassInfoExA (USER32.@)
1155  */
1156 BOOL WINAPI GetClassInfoExA( HINSTANCE hInstance, LPCSTR name, WNDCLASSEXA *wc )
1157 {
1158     ATOM atom = HIWORD(name) ? GlobalFindAtomA( name ) : LOWORD(name);
1159     CLASS *classPtr;
1160
1161     TRACE("%p %s %x %p\n", hInstance, debugstr_a(name), atom, wc);
1162
1163     if (!hInstance) hInstance = user32_module;
1164
1165     if (!atom || !(classPtr = CLASS_FindClassByAtom( atom, hInstance )))
1166     {
1167         SetLastError( ERROR_CLASS_DOES_NOT_EXIST );
1168         return FALSE;
1169     }
1170     wc->style         = classPtr->style;
1171     wc->lpfnWndProc   = (WNDPROC)CLASS_GetProc( classPtr, WIN_PROC_32A );
1172     wc->cbClsExtra    = classPtr->cbClsExtra;
1173     wc->cbWndExtra    = classPtr->cbWndExtra;
1174     wc->hInstance     = (hInstance == user32_module) ? 0 : hInstance;
1175     wc->hIcon         = (HICON)classPtr->hIcon;
1176     wc->hIconSm       = (HICON)classPtr->hIconSm;
1177     wc->hCursor       = (HCURSOR)classPtr->hCursor;
1178     wc->hbrBackground = (HBRUSH)classPtr->hbrBackground;
1179     wc->lpszMenuName  = CLASS_GetMenuNameA( classPtr );
1180     wc->lpszClassName = name;
1181     release_class_ptr( classPtr );
1182
1183     /* We must return the atom of the class here instead of just TRUE. */
1184     return atom;
1185 }
1186
1187
1188 /***********************************************************************
1189  *              GetClassInfoExW (USER32.@)
1190  */
1191 BOOL WINAPI GetClassInfoExW( HINSTANCE hInstance, LPCWSTR name, WNDCLASSEXW *wc )
1192 {
1193     ATOM atom = HIWORD(name) ? GlobalFindAtomW( name ) : LOWORD(name);
1194     CLASS *classPtr;
1195
1196     TRACE("%p %s %x %p\n", hInstance, debugstr_w(name), atom, wc);
1197
1198     if (!hInstance) hInstance = user32_module;
1199
1200     if (!atom || !(classPtr = CLASS_FindClassByAtom( atom, hInstance )))
1201     {
1202         SetLastError( ERROR_CLASS_DOES_NOT_EXIST );
1203         return FALSE;
1204     }
1205     wc->style         = classPtr->style;
1206     wc->lpfnWndProc   = (WNDPROC)CLASS_GetProc( classPtr, WIN_PROC_32W );
1207     wc->cbClsExtra    = classPtr->cbClsExtra;
1208     wc->cbWndExtra    = classPtr->cbWndExtra;
1209     wc->hInstance     = (hInstance == user32_module) ? 0 : hInstance;
1210     wc->hIcon         = (HICON)classPtr->hIcon;
1211     wc->hIconSm       = (HICON)classPtr->hIconSm;
1212     wc->hCursor       = (HCURSOR)classPtr->hCursor;
1213     wc->hbrBackground = (HBRUSH)classPtr->hbrBackground;
1214     wc->lpszMenuName  = CLASS_GetMenuNameW( classPtr );
1215     wc->lpszClassName = name;
1216     release_class_ptr( classPtr );
1217
1218     /* We must return the atom of the class here instead of just TRUE. */
1219     return atom;
1220 }
1221
1222
1223 #if 0  /* toolhelp is in kernel, so this cannot work */
1224
1225 /***********************************************************************
1226  *              ClassFirst (TOOLHELP.69)
1227  */
1228 BOOL16 WINAPI ClassFirst16( CLASSENTRY *pClassEntry )
1229 {
1230     TRACE("%p\n",pClassEntry);
1231     pClassEntry->wNext = 1;
1232     return ClassNext16( pClassEntry );
1233 }
1234
1235
1236 /***********************************************************************
1237  *              ClassNext (TOOLHELP.70)
1238  */
1239 BOOL16 WINAPI ClassNext16( CLASSENTRY *pClassEntry )
1240 {
1241     int i;
1242     CLASS *class = firstClass;
1243
1244     TRACE("%p\n",pClassEntry);
1245
1246     if (!pClassEntry->wNext) return FALSE;
1247     for (i = 1; (i < pClassEntry->wNext) && class; i++) class = class->next;
1248     if (!class)
1249     {
1250         pClassEntry->wNext = 0;
1251         return FALSE;
1252     }
1253     pClassEntry->hInst = class->hInstance;
1254     pClassEntry->wNext++;
1255     GlobalGetAtomNameA( class->atomName, pClassEntry->szClassName,
1256                           sizeof(pClassEntry->szClassName) );
1257     return TRUE;
1258 }
1259 #endif