dlls/user32/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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, 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/unicode.h"
  35 #include "win.h"
  36 #include "user_private.h"
  37 #include "controls.h"
  38 #include "wine/server.h"
  39 #include "wine/list.h"
  40 #include "wine/debug.h"
  41
  42 WINE_DEFAULT_DEBUG_CHANNEL(class);
  43
  44 #define MAX_ATOM_LEN 255 /* from dlls/kernel32/atom.c */
  45
  46 typedef struct tagCLASS
  47 {
  48     struct list      entry;         /* Entry in class list */
  49     UINT             style;         /* Class style */
  50     BOOL             local;         /* Local class? */
  51     WNDPROC          winproc;       /* Window procedure */
  52     INT              cbClsExtra;    /* Class extra bytes */
  53     INT              cbWndExtra;    /* Window extra bytes */
  54     LPWSTR           menuName;      /* Default menu name (Unicode followed by ASCII) */
  55     struct dce      *dce;           /* Opaque pointer to class DCE */
  56     HINSTANCE        hInstance;     /* Module that created the task */
  57     HICON            hIcon;         /* Default icon */
  58     HICON            hIconSm;       /* Default small icon */
  59     HCURSOR          hCursor;       /* Default cursor */
  60     HBRUSH           hbrBackground; /* Default background */
  61     ATOM             atomName;      /* Name of the class */
  62     WCHAR            name[MAX_ATOM_LEN + 1];
  63 } CLASS;
  64
  65 static struct list class_list = LIST_INIT( class_list );
  66
  67 #define CLASS_OTHER_PROCESS ((CLASS *)1)
  68
  69 /***********************************************************************
  70  *           get_class_ptr
  71  */
  72 static CLASS *get_class_ptr( HWND hwnd, BOOL write_access )
  73 {
  74     WND *ptr = WIN_GetPtr( hwnd );
  75
  76     if (ptr)
  77     {
  78         if (ptr != WND_OTHER_PROCESS && ptr != WND_DESKTOP) return ptr->class;
  79         if (!write_access) return CLASS_OTHER_PROCESS;
  80
  81         /* modifying classes in other processes is not allowed */
  82         if (ptr == WND_DESKTOP || IsWindow( hwnd ))
  83         {
  84             SetLastError( ERROR_ACCESS_DENIED );
  85             return NULL;
  86         }
  87     }
  88     SetLastError( ERROR_INVALID_WINDOW_HANDLE );
  89     return NULL;
  90 }
  91
  92
  93 /***********************************************************************
  94  *           release_class_ptr
  95  */
  96 static inline void release_class_ptr( CLASS *ptr )
  97 {
  98     USER_Unlock();
  99 }
 100
 101
 102 /***********************************************************************
 103  *           get_int_atom_value
 104  */
 105 ATOM get_int_atom_value( LPCWSTR name )
 106 {
 107     UINT ret = 0;
 108
 109     if (IS_INTRESOURCE(name)) return LOWORD(name);
 110     if (*name++ != '#') return 0;
 111     while (*name)
 112     {
 113         if (*name < '0' || *name > '9') return 0;
 114         ret = ret * 10 + *name++ - '0';
 115         if (ret > 0xffff) return 0;
 116     }
 117     return ret;
 118 }
 119
 120
 121 /***********************************************************************
 122  *           set_server_info
 123  *
 124  * Set class info with the wine server.
 125  */
 126 static BOOL set_server_info( HWND hwnd, INT offset, LONG_PTR newval, UINT size )
 127 {
 128     BOOL ret;
 129
 130     SERVER_START_REQ( set_class_info )
 131     {
 132         req->window = wine_server_user_handle( hwnd );
 133         req->extra_offset = -1;
 134         switch(offset)
 135         {
 136         case GCW_ATOM:
 137             req->flags = SET_CLASS_ATOM;
 138             req->atom = LOWORD(newval);
 139         case GCL_STYLE:
 140             req->flags = SET_CLASS_STYLE;
 141             req->style = newval;
 142             break;
 143         case GCL_CBWNDEXTRA:
 144             req->flags = SET_CLASS_WINEXTRA;
 145             req->win_extra = newval;
 146             break;
 147         case GCLP_HMODULE:
 148             req->flags = SET_CLASS_INSTANCE;
 149             req->instance = wine_server_client_ptr( (void *)newval );
 150             break;
 151         default:
 152             assert( offset >= 0 );
 153             req->flags = SET_CLASS_EXTRA;
 154             req->extra_offset = offset;
 155             req->extra_size = size;
 156             if ( size == sizeof(LONG) )
 157             {
 158                 LONG newlong = newval;
 159                 memcpy( &req->extra_value, &newlong, sizeof(LONG) );
 160             }
 161             else
 162                 memcpy( &req->extra_value, &newval, sizeof(LONG_PTR) );
 163             break;
 164         }
 165         ret = !wine_server_call_err( req );
 166     }
 167     SERVER_END_REQ;
 168     return ret;
 169 }
 170
 171
 172 /***********************************************************************
 173  *           CLASS_GetMenuNameA
 174  *
 175  * Get the menu name as a ASCII string.
 176  */
 177 static inline LPSTR CLASS_GetMenuNameA( CLASS *classPtr )
 178 {
 179     if (IS_INTRESOURCE(classPtr->menuName)) return (LPSTR)classPtr->menuName;
 180     return (LPSTR)(classPtr->menuName + strlenW(classPtr->menuName) + 1);
 181 }
 182
 183
 184 /***********************************************************************
 185  *           CLASS_GetMenuNameW
 186  *
 187  * Get the menu name as a Unicode string.
 188  */
 189 static inline LPWSTR CLASS_GetMenuNameW( CLASS *classPtr )
 190 {
 191     return classPtr->menuName;
 192 }
 193
 194
 195 /***********************************************************************
 196  *           CLASS_SetMenuNameA
 197  *
 198  * Set the menu name in a class structure by copying the string.
 199  */
 200 static void CLASS_SetMenuNameA( CLASS *classPtr, LPCSTR name )
 201 {
 202     if (!IS_INTRESOURCE(classPtr->menuName)) HeapFree( GetProcessHeap(), 0, classPtr->menuName );
 203     if (!IS_INTRESOURCE(name))
 204     {
 205         DWORD lenA = strlen(name) + 1;
 206         DWORD lenW = MultiByteToWideChar( CP_ACP, 0, name, lenA, NULL, 0 );
 207         classPtr->menuName = HeapAlloc( GetProcessHeap(), 0, lenA + lenW*sizeof(WCHAR) );
 208         MultiByteToWideChar( CP_ACP, 0, name, lenA, classPtr->menuName, lenW );
 209         memcpy( classPtr->menuName + lenW, name, lenA );
 210     }
 211     else classPtr->menuName = (LPWSTR)name;
 212 }
 213
 214
 215 /***********************************************************************
 216  *           CLASS_SetMenuNameW
 217  *
 218  * Set the menu name in a class structure by copying the string.
 219  */
 220 static void CLASS_SetMenuNameW( CLASS *classPtr, LPCWSTR name )
 221 {
 222     if (!IS_INTRESOURCE(classPtr->menuName)) HeapFree( GetProcessHeap(), 0, classPtr->menuName );
 223     if (!IS_INTRESOURCE(name))
 224     {
 225         DWORD lenW = strlenW(name) + 1;
 226         DWORD lenA = WideCharToMultiByte( CP_ACP, 0, name, lenW, NULL, 0, NULL, NULL );
 227         classPtr->menuName = HeapAlloc( GetProcessHeap(), 0, lenA + lenW*sizeof(WCHAR) );
 228         memcpy( classPtr->menuName, name, lenW*sizeof(WCHAR) );
 229         WideCharToMultiByte( CP_ACP, 0, name, lenW,
 230                              (char *)(classPtr->menuName + lenW), lenA, NULL, NULL );
 231     }
 232     else classPtr->menuName = (LPWSTR)name;
 233 }
 234
 235
 236 /***********************************************************************
 237  *           CLASS_FreeClass
 238  *
 239  * Free a class structure.
 240  */
 241 static void CLASS_FreeClass( CLASS *classPtr )
 242 {
 243     TRACE("%p\n", classPtr);
 244
 245     USER_Lock();
 246
 247     if (classPtr->dce) free_dce( classPtr->dce, 0 );
 248     list_remove( &classPtr->entry );
 249     if (classPtr->hbrBackground > (HBRUSH)(COLOR_GRADIENTINACTIVECAPTION + 1))
 250         DeleteObject( classPtr->hbrBackground );
 251     HeapFree( GetProcessHeap(), 0, classPtr->menuName );
 252     HeapFree( GetProcessHeap(), 0, classPtr );
 253     USER_Unlock();
 254 }
 255
 256
 257 /***********************************************************************
 258  *           CLASS_FindClass
 259  *
 260  * Return a pointer to the class.
 261  * hinstance has been normalized by the caller.
 262  */
 263 static CLASS *CLASS_FindClass( LPCWSTR name, HINSTANCE hinstance )
 264 {
 265     struct list *ptr;
 266     ATOM atom = get_int_atom_value( name );
 267
 268     USER_Lock();
 269
 270     LIST_FOR_EACH( ptr, &class_list )
 271     {
 272         CLASS *class = LIST_ENTRY( ptr, CLASS, entry );
 273         if (atom)
 274         {
 275             if (class->atomName != atom) continue;
 276         }
 277         else
 278         {
 279             if (!name || strcmpiW( class->name, name )) continue;
 280         }
 281         if (!hinstance || !class->local || class->hInstance == hinstance)
 282         {
 283             TRACE("%s %p -> %p\n", debugstr_w(name), hinstance, class);
 284             return class;
 285         }
 286     }
 287     USER_Unlock();
 288     TRACE("%s %p -> not found\n", debugstr_w(name), hinstance);
 289     return NULL;
 290 }
 291
 292
 293 /***********************************************************************
 294  *           CLASS_RegisterClass
 295  *
 296  * The real RegisterClass() functionality.
 297  */
 298 static CLASS *CLASS_RegisterClass( LPCWSTR name, HINSTANCE hInstance, BOOL local,
 299                                    DWORD style, INT classExtra, INT winExtra )
 300 {
 301     CLASS *classPtr;
 302     BOOL ret;
 303
 304     TRACE("name=%s hinst=%p style=0x%x clExtr=0x%x winExtr=0x%x\n",
 305           debugstr_w(name), hInstance, style, classExtra, winExtra );
 306
 307     /* Fix the extra bytes value */
 308
 309     if (classExtra > 40)  /* Extra bytes are limited to 40 in Win32 */
 310         WARN("Class extra bytes %d is > 40\n", classExtra);
 311     if (winExtra > 40)    /* Extra bytes are limited to 40 in Win32 */
 312         WARN("Win extra bytes %d is > 40\n", winExtra );
 313
 314     classPtr = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(CLASS) + classExtra );
 315     if (!classPtr) return NULL;
 316
 317     classPtr->atomName = get_int_atom_value( name );
 318     if (!classPtr->atomName && name) strcpyW( classPtr->name, name );
 319     else GlobalGetAtomNameW( classPtr->atomName, classPtr->name, sizeof(classPtr->name)/sizeof(WCHAR) );
 320
 321     SERVER_START_REQ( create_class )
 322     {
 323         req->local      = local;
 324         req->style      = style;
 325         req->instance   = wine_server_client_ptr( hInstance );
 326         req->extra      = classExtra;
 327         req->win_extra  = winExtra;
 328         req->client_ptr = wine_server_client_ptr( classPtr );
 329         req->atom       = classPtr->atomName;
 330         if (!req->atom && name) wine_server_add_data( req, name, strlenW(name) * sizeof(WCHAR) );
 331         ret = !wine_server_call_err( req );
 332         classPtr->atomName = reply->atom;
 333     }
 334     SERVER_END_REQ;
 335     if (!ret)
 336     {
 337         HeapFree( GetProcessHeap(), 0, classPtr );
 338         return NULL;
 339     }
 340
 341     classPtr->style       = style;
 342     classPtr->local       = local;
 343     classPtr->cbWndExtra  = winExtra;
 344     classPtr->cbClsExtra  = classExtra;
 345     classPtr->hInstance   = hInstance;
 346
 347     /* Other non-null values must be set by caller */
 348
 349     USER_Lock();
 350     if (local) list_add_head( &class_list, &classPtr->entry );
 351     else list_add_tail( &class_list, &classPtr->entry );
 352     return classPtr;
 353 }
 354
 355
 356 /***********************************************************************
 357  *           register_builtin
 358  *
 359  * Register a builtin control class.
 360  * This allows having both ASCII and Unicode winprocs for the same class.
 361  */
 362 static void register_builtin( const struct builtin_class_descr *descr )
 363 {
 364     CLASS *classPtr;
 365
 366     if (!(classPtr = CLASS_RegisterClass( descr->name, user32_module, FALSE,
 367                                           descr->style, 0, descr->extra ))) return;
 368
 369     classPtr->hCursor       = LoadCursorA( 0, (LPSTR)descr->cursor );
 370     classPtr->hbrBackground = descr->brush;
 371     classPtr->winproc       = BUILTIN_WINPROC( descr->proc );
 372     release_class_ptr( classPtr );
 373 }
 374
 375
 376 /***********************************************************************
 377  *           CLASS_RegisterBuiltinClasses
 378  */
 379 void CLASS_RegisterBuiltinClasses(void)
 380 {
 381     register_builtin( &DESKTOP_builtin_class );
 382     register_builtin( &BUTTON_builtin_class );
 383     register_builtin( &COMBO_builtin_class );
 384     register_builtin( &COMBOLBOX_builtin_class );
 385     register_builtin( &DIALOG_builtin_class );
 386     register_builtin( &EDIT_builtin_class );
 387     register_builtin( &ICONTITLE_builtin_class );
 388     register_builtin( &LISTBOX_builtin_class );
 389     register_builtin( &MDICLIENT_builtin_class );
 390     register_builtin( &MENU_builtin_class );
 391     register_builtin( &MESSAGE_builtin_class );
 392     register_builtin( &SCROLL_builtin_class );
 393     register_builtin( &STATIC_builtin_class );
 394 }
 395
 396
 397 /***********************************************************************
 398  *           get_class_winproc
 399  */
 400 WNDPROC get_class_winproc( CLASS *class )
 401 {
 402     return class->winproc;
 403 }
 404
 405
 406 /***********************************************************************
 407  *           get_class_dce
 408  */
 409 struct dce *get_class_dce( CLASS *class )
 410 {
 411     return class->dce;
 412 }
 413
 414
 415 /***********************************************************************
 416  *           set_class_dce
 417  */
 418 struct dce *set_class_dce( CLASS *class, struct dce *dce )
 419 {
 420     if (class->dce) return class->dce;  /* already set, don't change it */
 421     class->dce = dce;
 422     return dce;
 423 }
 424
 425
 426 /***********************************************************************
 427  *              RegisterClassA (USER32.@)
 428  *
 429  * Register a window class.
 430  *
 431  * RETURNS
 432  *      >0: Unique identifier
 433  *      0: Failure
 434  */
 435 ATOM WINAPI RegisterClassA( const WNDCLASSA* wc ) /* [in] Address of structure with class data */
 436 {
 437     WNDCLASSEXA wcex;
 438
 439     wcex.cbSize        = sizeof(wcex);
 440     wcex.style         = wc->style;
 441     wcex.lpfnWndProc   = wc->lpfnWndProc;
 442     wcex.cbClsExtra    = wc->cbClsExtra;
 443     wcex.cbWndExtra    = wc->cbWndExtra;
 444     wcex.hInstance     = wc->hInstance;
 445     wcex.hIcon         = wc->hIcon;
 446     wcex.hCursor       = wc->hCursor;
 447     wcex.hbrBackground = wc->hbrBackground;
 448     wcex.lpszMenuName  = wc->lpszMenuName;
 449     wcex.lpszClassName = wc->lpszClassName;
 450     wcex.hIconSm       = 0;
 451     return RegisterClassExA( &wcex );
 452 }
 453
 454
 455 /***********************************************************************
 456  *              RegisterClassW (USER32.@)
 457  *
 458  * See RegisterClassA.
 459  */
 460 ATOM WINAPI RegisterClassW( const WNDCLASSW* wc )
 461 {
 462     WNDCLASSEXW wcex;
 463
 464     wcex.cbSize        = sizeof(wcex);
 465     wcex.style         = wc->style;
 466     wcex.lpfnWndProc   = wc->lpfnWndProc;
 467     wcex.cbClsExtra    = wc->cbClsExtra;
 468     wcex.cbWndExtra    = wc->cbWndExtra;
 469     wcex.hInstance     = wc->hInstance;
 470     wcex.hIcon         = wc->hIcon;
 471     wcex.hCursor       = wc->hCursor;
 472     wcex.hbrBackground = wc->hbrBackground;
 473     wcex.lpszMenuName  = wc->lpszMenuName;
 474     wcex.lpszClassName = wc->lpszClassName;
 475     wcex.hIconSm       = 0;
 476     return RegisterClassExW( &wcex );
 477 }
 478
 479
 480 /***********************************************************************
 481  *              RegisterClassExA (USER32.@)
 482  */
 483 ATOM WINAPI RegisterClassExA( const WNDCLASSEXA* wc )
 484 {
 485     ATOM atom;
 486     CLASS *classPtr;
 487     HINSTANCE instance;
 488
 489     if (wc->cbClsExtra < 0 || wc->cbWndExtra < 0 ||
 490         wc->hInstance == user32_module)  /* we can't register a class for user32 */
 491     {
 492          SetLastError( ERROR_INVALID_PARAMETER );
 493          return 0;
 494     }
 495     if (!(instance = wc->hInstance)) instance = GetModuleHandleW( NULL );
 496
 497     if (!IS_INTRESOURCE(wc->lpszClassName))
 498     {
 499         WCHAR name[MAX_ATOM_LEN + 1];
 500
 501         if (!MultiByteToWideChar( CP_ACP, 0, wc->lpszClassName, -1, name, MAX_ATOM_LEN + 1 )) return 0;
 502         classPtr = CLASS_RegisterClass( name, instance, !(wc->style & CS_GLOBALCLASS),
 503                                         wc->style, wc->cbClsExtra, wc->cbWndExtra );
 504     }
 505     else
 506     {
 507         classPtr = CLASS_RegisterClass( (LPCWSTR)wc->lpszClassName, instance,
 508                                         !(wc->style & CS_GLOBALCLASS), wc->style,
 509                                         wc->cbClsExtra, wc->cbWndExtra );
 510     }
 511     if (!classPtr) return 0;
 512     atom = classPtr->atomName;
 513
 514     TRACE("name=%s atom=%04x wndproc=%p hinst=%p bg=%p style=%08x clsExt=%d winExt=%d class=%p\n",
 515           debugstr_a(wc->lpszClassName), atom, wc->lpfnWndProc, instance, wc->hbrBackground,
 516           wc->style, wc->cbClsExtra, wc->cbWndExtra, classPtr );
 517
 518     classPtr->hIcon         = wc->hIcon;
 519     classPtr->hIconSm       = wc->hIconSm;
 520     classPtr->hCursor       = wc->hCursor;
 521     classPtr->hbrBackground = wc->hbrBackground;
 522     classPtr->winproc       = WINPROC_AllocProc( wc->lpfnWndProc, FALSE );
 523     CLASS_SetMenuNameA( classPtr, wc->lpszMenuName );
 524     release_class_ptr( classPtr );
 525     return atom;
 526 }
 527
 528
 529 /***********************************************************************
 530  *              RegisterClassExW (USER32.@)
 531  */
 532 ATOM WINAPI RegisterClassExW( const WNDCLASSEXW* wc )
 533 {
 534     ATOM atom;
 535     CLASS *classPtr;
 536     HINSTANCE instance;
 537
 538     if (wc->cbClsExtra < 0 || wc->cbWndExtra < 0 ||
 539         wc->hInstance == user32_module)  /* we can't register a class for user32 */
 540     {
 541          SetLastError( ERROR_INVALID_PARAMETER );
 542          return 0;
 543     }
 544     if (!(instance = wc->hInstance)) instance = GetModuleHandleW( NULL );
 545
 546     if (!(classPtr = CLASS_RegisterClass( wc->lpszClassName, instance, !(wc->style & CS_GLOBALCLASS),
 547                                           wc->style, wc->cbClsExtra, wc->cbWndExtra )))
 548         return 0;
 549
 550     atom = classPtr->atomName;
 551
 552     TRACE("name=%s atom=%04x wndproc=%p hinst=%p bg=%p style=%08x clsExt=%d winExt=%d class=%p\n",
 553           debugstr_w(wc->lpszClassName), atom, wc->lpfnWndProc, instance, wc->hbrBackground,
 554           wc->style, wc->cbClsExtra, wc->cbWndExtra, classPtr );
 555
 556     classPtr->hIcon         = wc->hIcon;
 557     classPtr->hIconSm       = wc->hIconSm;
 558     classPtr->hCursor       = wc->hCursor;
 559     classPtr->hbrBackground = wc->hbrBackground;
 560     classPtr->winproc       = WINPROC_AllocProc( wc->lpfnWndProc, TRUE );
 561     CLASS_SetMenuNameW( classPtr, wc->lpszMenuName );
 562     release_class_ptr( classPtr );
 563     return atom;
 564 }
 565
 566
 567 /***********************************************************************
 568  *              UnregisterClassA (USER32.@)
 569  */
 570 BOOL WINAPI UnregisterClassA( LPCSTR className, HINSTANCE hInstance )
 571 {
 572     if (!IS_INTRESOURCE(className))
 573     {
 574         WCHAR name[MAX_ATOM_LEN + 1];
 575
 576         if (!MultiByteToWideChar( CP_ACP, 0, className, -1, name, MAX_ATOM_LEN + 1 ))
 577             return FALSE;
 578         return UnregisterClassW( name, hInstance );
 579     }
 580     return UnregisterClassW( (LPCWSTR)className, hInstance );
 581 }
 582
 583 /***********************************************************************
 584  *              UnregisterClassW (USER32.@)
 585  */
 586 BOOL WINAPI UnregisterClassW( LPCWSTR className, HINSTANCE hInstance )
 587 {
 588     CLASS *classPtr = NULL;
 589
 590     SERVER_START_REQ( destroy_class )
 591     {
 592         req->instance = wine_server_client_ptr( hInstance );
 593         if (!(req->atom = get_int_atom_value(className)) && className)
 594             wine_server_add_data( req, className, strlenW(className) * sizeof(WCHAR) );
 595         if (!wine_server_call_err( req )) classPtr = wine_server_get_ptr( reply->client_ptr );
 596     }
 597     SERVER_END_REQ;
 598
 599     if (classPtr) CLASS_FreeClass( classPtr );
 600     return (classPtr != NULL);
 601 }
 602
 603
 604 /***********************************************************************
 605  *              GetClassWord (USER32.@)
 606  */
 607 WORD WINAPI GetClassWord( HWND hwnd, INT offset )
 608 {
 609     CLASS *class;
 610     WORD retvalue = 0;
 611
 612     if (offset < 0) return GetClassLongA( hwnd, offset );
 613
 614     if (!(class = get_class_ptr( hwnd, FALSE ))) return 0;
 615
 616     if (class == CLASS_OTHER_PROCESS)
 617     {
 618         SERVER_START_REQ( set_class_info )
 619         {
 620             req->window = wine_server_user_handle( hwnd );
 621             req->flags = 0;
 622             req->extra_offset = offset;
 623             req->extra_size = sizeof(retvalue);
 624             if (!wine_server_call_err( req ))
 625                 memcpy( &retvalue, &reply->old_extra_value, sizeof(retvalue) );
 626         }
 627         SERVER_END_REQ;
 628         return retvalue;
 629     }
 630
 631     if (offset <= class->cbClsExtra - sizeof(WORD))
 632         memcpy( &retvalue, (char *)(class + 1) + offset, sizeof(retvalue) );
 633     else
 634         SetLastError( ERROR_INVALID_INDEX );
 635     release_class_ptr( class );
 636     return retvalue;
 637 }
 638
 639
 640 /***********************************************************************
 641  *             CLASS_GetClassLong
 642  *
 643  * Implementation of GetClassLong(Ptr)A/W
 644  */
 645 static ULONG_PTR CLASS_GetClassLong( HWND hwnd, INT offset, UINT size,
 646                                      BOOL unicode )
 647 {
 648     CLASS *class;
 649     ULONG_PTR retvalue = 0;
 650
 651     if (!(class = get_class_ptr( hwnd, FALSE ))) return 0;
 652
 653     if (class == CLASS_OTHER_PROCESS)
 654     {
 655         SERVER_START_REQ( set_class_info )
 656         {
 657             req->window = wine_server_user_handle( hwnd );
 658             req->flags = 0;
 659             req->extra_offset = (offset >= 0) ? offset : -1;
 660             req->extra_size = (offset >= 0) ? size : 0;
 661             if (!wine_server_call_err( req ))
 662             {
 663                 switch(offset)
 664                 {
 665                 case GCLP_HBRBACKGROUND:
 666                 case GCLP_HCURSOR:
 667                 case GCLP_HICON:
 668                 case GCLP_HICONSM:
 669                 case GCLP_WNDPROC:
 670                 case GCLP_MENUNAME:
 671                     FIXME( "offset %d (%s) not supported on other process window %p\n",
 672                            offset, SPY_GetClassLongOffsetName(offset), hwnd );
 673                     SetLastError( ERROR_INVALID_HANDLE );
 674                     break;
 675                 case GCL_STYLE:
 676                     retvalue = reply->old_style;
 677                     break;
 678                 case GCL_CBWNDEXTRA:
 679                     retvalue = reply->old_win_extra;
 680                     break;
 681                 case GCL_CBCLSEXTRA:
 682                     retvalue = reply->old_extra;
 683                     break;
 684                 case GCLP_HMODULE:
 685                     retvalue = (ULONG_PTR)wine_server_get_ptr( reply->old_instance );
 686                     break;
 687                 case GCW_ATOM:
 688                     retvalue = reply->old_atom;
 689                     break;
 690                 default:
 691                     if (offset >= 0)
 692                     {
 693                         if (size == sizeof(DWORD))
 694                         {
 695                             DWORD retdword;
 696                             memcpy( &retdword, &reply->old_extra_value, sizeof(DWORD) );
 697                             retvalue = retdword;
 698                         }
 699                         else
 700                             memcpy( &retvalue, &reply->old_extra_value,
 701                                     sizeof(ULONG_PTR) );
 702                     }
 703                     else SetLastError( ERROR_INVALID_INDEX );
 704                     break;
 705                 }
 706             }
 707         }
 708         SERVER_END_REQ;
 709         return retvalue;
 710     }
 711
 712     if (offset >= 0)
 713     {
 714         if (offset <= class->cbClsExtra - size)
 715         {
 716             if (size == sizeof(DWORD))
 717             {
 718                 DWORD retdword;
 719                 memcpy( &retdword, (char *)(class + 1) + offset, sizeof(DWORD) );
 720                 retvalue = retdword;
 721             }
 722             else
 723                 memcpy( &retvalue, (char *)(class + 1) + offset, sizeof(ULONG_PTR) );
 724         }
 725         else
 726             SetLastError( ERROR_INVALID_INDEX );
 727         release_class_ptr( class );
 728         return retvalue;
 729     }
 730
 731     switch(offset)
 732     {
 733     case GCLP_HBRBACKGROUND:
 734         retvalue = (ULONG_PTR)class->hbrBackground;
 735         break;
 736     case GCLP_HCURSOR:
 737         retvalue = (ULONG_PTR)class->hCursor;
 738         break;
 739     case GCLP_HICON:
 740         retvalue = (ULONG_PTR)class->hIcon;
 741         break;
 742     case GCLP_HICONSM:
 743         retvalue = (ULONG_PTR)class->hIconSm;
 744         break;
 745     case GCL_STYLE:
 746         retvalue = class->style;
 747         break;
 748     case GCL_CBWNDEXTRA:
 749         retvalue = class->cbWndExtra;
 750         break;
 751     case GCL_CBCLSEXTRA:
 752         retvalue = class->cbClsExtra;
 753         break;
 754     case GCLP_HMODULE:
 755         retvalue = (ULONG_PTR)class->hInstance;
 756         break;
 757     case GCLP_WNDPROC:
 758         retvalue = (ULONG_PTR)WINPROC_GetProc( class->winproc, unicode );
 759         break;
 760     case GCLP_MENUNAME:
 761         retvalue = (ULONG_PTR)CLASS_GetMenuNameW( class );
 762         if (unicode)
 763             retvalue = (ULONG_PTR)CLASS_GetMenuNameW( class );
 764         else
 765             retvalue = (ULONG_PTR)CLASS_GetMenuNameA( class );
 766         break;
 767     case GCW_ATOM:
 768         retvalue = class->atomName;
 769         break;
 770     default:
 771         SetLastError( ERROR_INVALID_INDEX );
 772         break;
 773     }
 774     release_class_ptr( class );
 775     return retvalue;
 776 }
 777
 778
 779 /***********************************************************************
 780  *              GetClassLongW (USER32.@)
 781  */
 782 DWORD WINAPI GetClassLongW( HWND hwnd, INT offset )
 783 {
 784     return CLASS_GetClassLong( hwnd, offset, sizeof(DWORD), TRUE );
 785 }
 786
 787
 788
 789 /***********************************************************************
 790  *              GetClassLongA (USER32.@)
 791  */
 792 DWORD WINAPI GetClassLongA( HWND hwnd, INT offset )
 793 {
 794     return CLASS_GetClassLong( hwnd, offset, sizeof(DWORD), FALSE );
 795 }
 796
 797
 798 /***********************************************************************
 799  *              SetClassWord (USER32.@)
 800  */
 801 WORD WINAPI SetClassWord( HWND hwnd, INT offset, WORD newval )
 802 {
 803     CLASS *class;
 804     WORD retval = 0;
 805
 806     if (offset < 0) return SetClassLongA( hwnd, offset, (DWORD)newval );
 807
 808     if (!(class = get_class_ptr( hwnd, TRUE ))) return 0;
 809
 810     SERVER_START_REQ( set_class_info )
 811     {
 812         req->window = wine_server_user_handle( hwnd );
 813         req->flags = SET_CLASS_EXTRA;
 814         req->extra_offset = offset;
 815         req->extra_size = sizeof(newval);
 816         memcpy( &req->extra_value, &newval, sizeof(newval) );
 817         if (!wine_server_call_err( req ))
 818         {
 819             void *ptr = (char *)(class + 1) + offset;
 820             memcpy( &retval, ptr, sizeof(retval) );
 821             memcpy( ptr, &newval, sizeof(newval) );
 822         }
 823     }
 824     SERVER_END_REQ;
 825     release_class_ptr( class );
 826     return retval;
 827 }
 828
 829
 830 /***********************************************************************
 831  *             CLASS_SetClassLong
 832  *
 833  * Implementation of SetClassLong(Ptr)A/W
 834  */
 835 static ULONG_PTR CLASS_SetClassLong( HWND hwnd, INT offset, LONG_PTR newval,
 836                                      UINT size, BOOL unicode )
 837 {
 838     CLASS *class;
 839     ULONG_PTR retval = 0;
 840
 841     if (!(class = get_class_ptr( hwnd, TRUE ))) return 0;
 842
 843     if (offset >= 0)
 844     {
 845         if (set_server_info( hwnd, offset, newval, size ))
 846         {
 847             void *ptr = (char *)(class + 1) + offset;
 848             if ( size == sizeof(LONG) )
 849             {
 850                 DWORD retdword;
 851                 LONG newlong = newval;
 852                 memcpy( &retdword, ptr, sizeof(DWORD) );
 853                 memcpy( ptr, &newlong, sizeof(LONG) );
 854                 retval = retdword;
 855             }
 856             else
 857             {
 858                 memcpy( &retval, ptr, sizeof(ULONG_PTR) );
 859                 memcpy( ptr, &newval, sizeof(LONG_PTR) );
 860             }
 861         }
 862     }
 863     else switch(offset)
 864     {
 865     case GCLP_MENUNAME:
 866         if ( unicode )
 867             CLASS_SetMenuNameW( class, (LPCWSTR)newval );
 868         else
 869             CLASS_SetMenuNameA( class, (LPCSTR)newval );
 870         retval = 0;  /* Old value is now meaningless anyway */
 871         break;
 872     case GCLP_WNDPROC:
 873         retval = (ULONG_PTR)WINPROC_GetProc( class->winproc, unicode );
 874         class->winproc = WINPROC_AllocProc( (WNDPROC)newval, unicode );
 875         break;
 876     case GCLP_HBRBACKGROUND:
 877         retval = (ULONG_PTR)class->hbrBackground;
 878         class->hbrBackground = (HBRUSH)newval;
 879         break;
 880     case GCLP_HCURSOR:
 881         retval = (ULONG_PTR)class->hCursor;
 882         class->hCursor = (HCURSOR)newval;
 883         break;
 884     case GCLP_HICON:
 885         retval = (ULONG_PTR)class->hIcon;
 886         class->hIcon = (HICON)newval;
 887         break;
 888     case GCLP_HICONSM:
 889         retval = (ULONG_PTR)class->hIconSm;
 890         class->hIconSm = (HICON)newval;
 891         break;
 892     case GCL_STYLE:
 893         if (!set_server_info( hwnd, offset, newval, size )) break;
 894         retval = class->style;
 895         class->style = newval;
 896         break;
 897     case GCL_CBWNDEXTRA:
 898         if (!set_server_info( hwnd, offset, newval, size )) break;
 899         retval = class->cbWndExtra;
 900         class->cbWndExtra = newval;
 901         break;
 902     case GCLP_HMODULE:
 903         if (!set_server_info( hwnd, offset, newval, size )) break;
 904         retval = (ULONG_PTR)class->hInstance;
 905         class->hInstance = (HINSTANCE)newval;
 906         break;
 907     case GCW_ATOM:
 908         if (!set_server_info( hwnd, offset, newval, size )) break;
 909         retval = class->atomName;
 910         class->atomName = newval;
 911         GlobalGetAtomNameW( newval, class->name, sizeof(class->name)/sizeof(WCHAR) );
 912         break;
 913     case GCL_CBCLSEXTRA:  /* cannot change this one */
 914         SetLastError( ERROR_INVALID_PARAMETER );
 915         break;
 916     default:
 917         SetLastError( ERROR_INVALID_INDEX );
 918         break;
 919     }
 920     release_class_ptr( class );
 921     return retval;
 922 }
 923
 924
 925 /***********************************************************************
 926  *              SetClassLongW (USER32.@)
 927  */
 928 DWORD WINAPI SetClassLongW( HWND hwnd, INT offset, LONG newval )
 929 {
 930     return CLASS_SetClassLong( hwnd, offset, newval, sizeof(LONG), TRUE );
 931 }
 932
 933
 934 /***********************************************************************
 935  *              SetClassLongA (USER32.@)
 936  */
 937 DWORD WINAPI SetClassLongA( HWND hwnd, INT offset, LONG newval )
 938 {
 939     return CLASS_SetClassLong( hwnd, offset, newval, sizeof(LONG), FALSE );
 940 }
 941
 942
 943 /***********************************************************************
 944  *              GetClassNameA (USER32.@)
 945  */
 946 INT WINAPI GetClassNameA( HWND hwnd, LPSTR buffer, INT count )
 947 {
 948     WCHAR tmpbuf[MAX_ATOM_LEN + 1];
 949     DWORD len;
 950
 951     if (count <= 0) return 0;
 952     if (!GetClassNameW( hwnd, tmpbuf, sizeof(tmpbuf)/sizeof(WCHAR) )) return 0;
 953     RtlUnicodeToMultiByteN( buffer, count - 1, &len, tmpbuf, strlenW(tmpbuf) * sizeof(WCHAR) );
 954     buffer[len] = 0;
 955     return len;
 956 }
 957
 958
 959 /***********************************************************************
 960  *              GetClassNameW (USER32.@)
 961  */
 962 INT WINAPI GetClassNameW( HWND hwnd, LPWSTR buffer, INT count )
 963 {
 964     CLASS *class;
 965     INT ret;
 966
 967     TRACE("%p %p %d\n", hwnd, buffer, count);
 968
 969     if (count <= 0) return 0;
 970
 971     if (!(class = get_class_ptr( hwnd, FALSE ))) return 0;
 972
 973     if (class == CLASS_OTHER_PROCESS)
 974     {
 975         WCHAR tmpbuf[MAX_ATOM_LEN + 1];
 976
 977         ret = GlobalGetAtomNameW( GetClassLongW( hwnd, GCW_ATOM ), tmpbuf, MAX_ATOM_LEN + 1 );
 978         if (ret)
 979         {
 980             ret = min(count - 1, ret);
 981             memcpy(buffer, tmpbuf, ret * sizeof(WCHAR));
 982             buffer[ret] = 0;
 983         }
 984     }
 985     else
 986     {
 987         lstrcpynW( buffer, class->name, count );
 988         release_class_ptr( class );
 989         ret = strlenW( buffer );
 990     }
 991     return ret;
 992 }
 993
 994
 995 /***********************************************************************
 996  *              RealGetWindowClassA (USER32.@)
 997  */
 998 UINT WINAPI RealGetWindowClassA( HWND hwnd, LPSTR buffer, UINT count )
 999 {
1000     return GetClassNameA( hwnd, buffer, count );
1001 }
1002
1003
1004 /***********************************************************************
1005  *              RealGetWindowClassW (USER32.@)
1006  */
1007 UINT WINAPI RealGetWindowClassW( HWND hwnd, LPWSTR buffer, UINT count )
1008 {
1009     return GetClassNameW( hwnd, buffer, count );
1010 }
1011
1012
1013 /***********************************************************************
1014  *              GetClassInfoA (USER32.@)
1015  */
1016 BOOL WINAPI GetClassInfoA( HINSTANCE hInstance, LPCSTR name, WNDCLASSA *wc )
1017 {
1018     WNDCLASSEXA wcex;
1019     UINT ret = GetClassInfoExA( hInstance, name, &wcex );
1020
1021     if (ret)
1022     {
1023         wc->style         = wcex.style;
1024         wc->lpfnWndProc   = wcex.lpfnWndProc;
1025         wc->cbClsExtra    = wcex.cbClsExtra;
1026         wc->cbWndExtra    = wcex.cbWndExtra;
1027         wc->hInstance     = wcex.hInstance;
1028         wc->hIcon         = wcex.hIcon;
1029         wc->hCursor       = wcex.hCursor;
1030         wc->hbrBackground = wcex.hbrBackground;
1031         wc->lpszMenuName  = wcex.lpszMenuName;
1032         wc->lpszClassName = wcex.lpszClassName;
1033     }
1034     return ret;
1035 }
1036
1037
1038 /***********************************************************************
1039  *              GetClassInfoW (USER32.@)
1040  */
1041 BOOL WINAPI GetClassInfoW( HINSTANCE hInstance, LPCWSTR name, WNDCLASSW *wc )
1042 {
1043     WNDCLASSEXW wcex;
1044     UINT ret = GetClassInfoExW( hInstance, name, &wcex );
1045
1046     if (ret)
1047     {
1048         wc->style         = wcex.style;
1049         wc->lpfnWndProc   = wcex.lpfnWndProc;
1050         wc->cbClsExtra    = wcex.cbClsExtra;
1051         wc->cbWndExtra    = wcex.cbWndExtra;
1052         wc->hInstance     = wcex.hInstance;
1053         wc->hIcon         = wcex.hIcon;
1054         wc->hCursor       = wcex.hCursor;
1055         wc->hbrBackground = wcex.hbrBackground;
1056         wc->lpszMenuName  = wcex.lpszMenuName;
1057         wc->lpszClassName = wcex.lpszClassName;
1058     }
1059     return ret;
1060 }
1061
1062
1063 /***********************************************************************
1064  *              GetClassInfoExA (USER32.@)
1065  */
1066 BOOL WINAPI GetClassInfoExA( HINSTANCE hInstance, LPCSTR name, WNDCLASSEXA *wc )
1067 {
1068     ATOM atom;
1069     CLASS *classPtr;
1070
1071     TRACE("%p %s %p\n", hInstance, debugstr_a(name), wc);
1072
1073     if (!hInstance) hInstance = user32_module;
1074
1075     if (!IS_INTRESOURCE(name))
1076     {
1077         WCHAR nameW[MAX_ATOM_LEN + 1];
1078         if (!MultiByteToWideChar( CP_ACP, 0, name, -1, nameW, sizeof(nameW)/sizeof(WCHAR) ))
1079             return FALSE;
1080         classPtr = CLASS_FindClass( nameW, hInstance );
1081     }
1082     else classPtr = CLASS_FindClass( (LPCWSTR)name, hInstance );
1083
1084     if (!classPtr)
1085     {
1086         SetLastError( ERROR_CLASS_DOES_NOT_EXIST );
1087         return FALSE;
1088     }
1089     wc->style         = classPtr->style;
1090     wc->lpfnWndProc   = WINPROC_GetProc( classPtr->winproc, FALSE );
1091     wc->cbClsExtra    = classPtr->cbClsExtra;
1092     wc->cbWndExtra    = classPtr->cbWndExtra;
1093     wc->hInstance     = (hInstance == user32_module) ? 0 : hInstance;
1094     wc->hIcon         = classPtr->hIcon;
1095     wc->hIconSm       = classPtr->hIconSm;
1096     wc->hCursor       = classPtr->hCursor;
1097     wc->hbrBackground = classPtr->hbrBackground;
1098     wc->lpszMenuName  = CLASS_GetMenuNameA( classPtr );
1099     wc->lpszClassName = name;
1100     atom = classPtr->atomName;
1101     release_class_ptr( classPtr );
1102
1103     /* We must return the atom of the class here instead of just TRUE. */
1104     return atom;
1105 }
1106
1107
1108 /***********************************************************************
1109  *              GetClassInfoExW (USER32.@)
1110  */
1111 BOOL WINAPI GetClassInfoExW( HINSTANCE hInstance, LPCWSTR name, WNDCLASSEXW *wc )
1112 {
1113     ATOM atom;
1114     CLASS *classPtr;
1115
1116     TRACE("%p %s %p\n", hInstance, debugstr_w(name), wc);
1117
1118     if (!hInstance) hInstance = user32_module;
1119
1120     if (!(classPtr = CLASS_FindClass( name, hInstance )))
1121     {
1122         SetLastError( ERROR_CLASS_DOES_NOT_EXIST );
1123         return FALSE;
1124     }
1125     wc->style         = classPtr->style;
1126     wc->lpfnWndProc   = WINPROC_GetProc( classPtr->winproc, TRUE );
1127     wc->cbClsExtra    = classPtr->cbClsExtra;
1128     wc->cbWndExtra    = classPtr->cbWndExtra;
1129     wc->hInstance     = (hInstance == user32_module) ? 0 : hInstance;
1130     wc->hIcon         = classPtr->hIcon;
1131     wc->hIconSm       = classPtr->hIconSm;
1132     wc->hCursor       = classPtr->hCursor;
1133     wc->hbrBackground = classPtr->hbrBackground;
1134     wc->lpszMenuName  = CLASS_GetMenuNameW( classPtr );
1135     wc->lpszClassName = name;
1136     atom = classPtr->atomName;
1137     release_class_ptr( classPtr );
1138
1139     /* We must return the atom of the class here instead of just TRUE. */
1140     return atom;
1141 }
1142
1143
1144 #if 0  /* toolhelp is in kernel, so this cannot work */
1145
1146 /***********************************************************************
1147  *              ClassFirst (TOOLHELP.69)
1148  */
1149 BOOL16 WINAPI ClassFirst16( CLASSENTRY *pClassEntry )
1150 {
1151     TRACE("%p\n",pClassEntry);
1152     pClassEntry->wNext = 1;
1153     return ClassNext16( pClassEntry );
1154 }
1155
1156
1157 /***********************************************************************
1158  *              ClassNext (TOOLHELP.70)
1159  */
1160 BOOL16 WINAPI ClassNext16( CLASSENTRY *pClassEntry )
1161 {
1162     int i;
1163     CLASS *class = firstClass;
1164
1165     TRACE("%p\n",pClassEntry);
1166
1167     if (!pClassEntry->wNext) return FALSE;
1168     for (i = 1; (i < pClassEntry->wNext) && class; i++) class = class->next;
1169     if (!class)
1170     {
1171         pClassEntry->wNext = 0;
1172         return FALSE;
1173     }
1174     pClassEntry->hInst = class->hInstance;
1175     pClassEntry->wNext++;
1176     GlobalGetAtomNameA( class->atomName, pClassEntry->szClassName,
1177                           sizeof(pClassEntry->szClassName) );
1178     return TRUE;
1179 }
1180 #endif
1181
1182 /* 64bit versions */
1183
1184 #ifdef GetClassLongPtrA
1185 #undef GetClassLongPtrA
1186 #endif
1187
1188 #ifdef GetClassLongPtrW
1189 #undef GetClassLongPtrW
1190 #endif
1191
1192 #ifdef SetClassLongPtrA
1193 #undef SetClassLongPtrA
1194 #endif
1195
1196 #ifdef SetClassLongPtrW
1197 #undef SetClassLongPtrW
1198 #endif
1199
1200 /***********************************************************************
1201  *              GetClassLongPtrA (USER32.@)
1202  */
1203 ULONG_PTR WINAPI GetClassLongPtrA( HWND hwnd, INT offset )
1204 {
1205     return CLASS_GetClassLong( hwnd, offset, sizeof(ULONG_PTR), FALSE );
1206 }
1207
1208 /***********************************************************************
1209  *              GetClassLongPtrW (USER32.@)
1210  */
1211 ULONG_PTR WINAPI GetClassLongPtrW( HWND hwnd, INT offset )
1212 {
1213     return CLASS_GetClassLong( hwnd, offset, sizeof(ULONG_PTR), TRUE );
1214 }
1215
1216 /***********************************************************************
1217  *              SetClassLongPtrW (USER32.@)
1218  */
1219 ULONG_PTR WINAPI SetClassLongPtrW( HWND hwnd, INT offset, LONG_PTR newval )
1220 {
1221     return CLASS_SetClassLong( hwnd, offset, newval, sizeof(LONG_PTR), TRUE );
1222 }
1223
1224 /***********************************************************************
1225  *              SetClassLongPtrA (USER32.@)
1226  */
1227 ULONG_PTR WINAPI SetClassLongPtrA( HWND hwnd, INT offset, LONG_PTR newval )
1228 {
1229     return CLASS_SetClassLong( hwnd, offset, newval, sizeof(LONG_PTR), FALSE );
1230 }