windows/class.c

   1 /*
   2  * Window classes functions
   3  *
   4  * Copyright 1993, 1996 Alexandre Julliard
   5  *           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  * FIXME: In win32 all classes are local. They are registered at
  22  *        program start. Processes CANNOT share classes. (Source: some
  23  *        win31->NT migration book)
  24  *
  25  * FIXME: There seems to be a general problem with hInstance in WINE
  26  *   classes are getting registered with wrong hInstance.
  27  */
  28
  29 #include "config.h"
  30 #include "wine/port.h"
  31
  32 #include <stdlib.h>
  33 #include <string.h>
  34
  35 #include "wine/winbase16.h"
  36 #include "winerror.h"
  37 #include "windef.h"
  38 #include "wingdi.h"
  39 #include "wine/winuser16.h"
  40 #include "wownt32.h"
  41 #include "wine/unicode.h"
  42 #include "win.h"
  43 #include "user.h"
  44 #include "controls.h"
  45 #include "dce.h"
  46 #include "winproc.h"
  47 #include "wine/debug.h"
  48
  49 WINE_DEFAULT_DEBUG_CHANNEL(class);
  50
  51 typedef struct tagCLASS
  52 {
  53     struct tagCLASS *next;          /* Next class */
  54     struct tagCLASS *prev;          /* Prev class */
  55     UINT             cWindows;      /* Count of existing windows */
  56     UINT             style;         /* Class style */
  57     WNDPROC          winprocA;      /* Window procedure (ASCII) */
  58     WNDPROC          winprocW;      /* Window procedure (Unicode) */
  59     INT              cbClsExtra;    /* Class extra bytes */
  60     INT              cbWndExtra;    /* Window extra bytes */
  61     LPWSTR           menuName;      /* Default menu name (Unicode followed by ASCII) */
  62     SEGPTR           segMenuName;   /* Default menu name as SEGPTR */
  63     struct tagDCE   *dce;           /* Class DCE (if CS_CLASSDC) */
  64     HINSTANCE        hInstance;     /* Module that created the task */
  65     HICON            hIcon;         /* Default icon */
  66     HICON            hIconSm;       /* Default small icon */
  67     HCURSOR          hCursor;       /* Default cursor */
  68     HBRUSH           hbrBackground; /* Default background */
  69     ATOM             atomName;      /* Name of the class */
  70 } CLASS;
  71
  72 static CLASS *firstClass;
  73
  74 /***********************************************************************
  75  *           get_class_ptr
  76  */
  77 static CLASS *get_class_ptr( HWND hwnd, BOOL write_access )
  78 {
  79     WND *ptr = WIN_GetPtr( hwnd );
  80
  81     if (ptr)
  82     {
  83         if (ptr != WND_OTHER_PROCESS) return ptr->class;
  84         if (IsWindow( hwnd )) /* check other processes */
  85         {
  86             if (write_access)
  87             {
  88                 /* modifying classes in other processes is not allowed */
  89                 SetLastError( ERROR_ACCESS_DENIED );
  90                 return NULL;
  91             }
  92             FIXME( "reading from class of other process window %p\n", hwnd );
  93             /* DbgBreakPoint(); */
  94         }
  95     }
  96     SetLastError( ERROR_INVALID_WINDOW_HANDLE );
  97     return NULL;
  98 }
  99
 100
 101 /***********************************************************************
 102  *           release_class_ptr
 103  */
 104 inline static void release_class_ptr( CLASS *ptr )
 105 {
 106     USER_Unlock();
 107 }
 108
 109
 110 /***********************************************************************
 111  *           CLASS_GetProc
 112  *
 113  * Get the class winproc for a given proc type
 114  */
 115 static WNDPROC16 CLASS_GetProc( CLASS *classPtr, WINDOWPROCTYPE type )
 116 {
 117     WNDPROC proc = classPtr->winprocA;
 118
 119     if (classPtr->winprocW)
 120     {
 121         /* if we have a Unicode proc, use it if we have no ASCII proc
 122          * or if we have both and Unicode was requested
 123          */
 124         if (!proc || type == WIN_PROC_32W) proc = classPtr->winprocW;
 125     }
 126     return WINPROC_GetProc( proc, type );
 127 }
 128
 129
 130 /***********************************************************************
 131  *           CLASS_SetProc
 132  *
 133  * Set the class winproc for a given proc type.
 134  * Returns the previous window proc.
 135  */
 136 static WNDPROC16 CLASS_SetProc( CLASS *classPtr, WNDPROC newproc, WINDOWPROCTYPE type )
 137 {
 138     WNDPROC *proc = &classPtr->winprocA;
 139     WNDPROC16 ret;
 140
 141     if (classPtr->winprocW)
 142     {
 143         /* if we have a Unicode proc, use it if we have no ASCII proc
 144          * or if we have both and Unicode was requested
 145          */
 146         if (!*proc || type == WIN_PROC_32W) proc = &classPtr->winprocW;
 147     }
 148     ret = WINPROC_GetProc( *proc, type );
 149     WINPROC_SetProc( proc, newproc, type, WIN_PROC_CLASS );
 150     /* now free the one that we didn't set */
 151     if (classPtr->winprocA && classPtr->winprocW)
 152     {
 153         if (proc == &classPtr->winprocA)
 154         {
 155             WINPROC_FreeProc( classPtr->winprocW, WIN_PROC_CLASS );
 156             classPtr->winprocW = 0;
 157         }
 158         else
 159         {
 160             WINPROC_FreeProc( classPtr->winprocA, WIN_PROC_CLASS );
 161             classPtr->winprocA = 0;
 162         }
 163     }
 164     return ret;
 165 }
 166
 167
 168 /***********************************************************************
 169  *           CLASS_GetMenuNameA
 170  *
 171  * Get the menu name as a ASCII string.
 172  */
 173 inline static LPSTR CLASS_GetMenuNameA( CLASS *classPtr )
 174 {
 175     if (!HIWORD(classPtr->menuName)) return (LPSTR)classPtr->menuName;
 176     return (LPSTR)(classPtr->menuName + strlenW(classPtr->menuName) + 1);
 177 }
 178
 179
 180 /***********************************************************************
 181  *           CLASS_GetMenuName16
 182  *
 183  * Get the menu name as a SEGPTR.
 184  */
 185 inline static SEGPTR CLASS_GetMenuName16( CLASS *classPtr )
 186 {
 187     if (!HIWORD(classPtr->menuName)) return (SEGPTR)classPtr->menuName;
 188     if (!classPtr->segMenuName)
 189         classPtr->segMenuName = MapLS( CLASS_GetMenuNameA(classPtr) );
 190     return classPtr->segMenuName;
 191 }
 192
 193
 194 /***********************************************************************
 195  *           CLASS_GetMenuNameW
 196  *
 197  * Get the menu name as a Unicode string.
 198  */
 199 inline static LPWSTR CLASS_GetMenuNameW( CLASS *classPtr )
 200 {
 201     return classPtr->menuName;
 202 }
 203
 204
 205 /***********************************************************************
 206  *           CLASS_SetMenuNameA
 207  *
 208  * Set the menu name in a class structure by copying the string.
 209  */
 210 static void CLASS_SetMenuNameA( CLASS *classPtr, LPCSTR name )
 211 {
 212     UnMapLS( classPtr->segMenuName );
 213     classPtr->segMenuName = 0;
 214     if (HIWORD(classPtr->menuName)) HeapFree( GetProcessHeap(), 0, classPtr->menuName );
 215     if (HIWORD(name))
 216     {
 217         DWORD lenA = strlen(name) + 1;
 218         DWORD lenW = MultiByteToWideChar( CP_ACP, 0, name, lenA, NULL, 0 );
 219         classPtr->menuName = HeapAlloc( GetProcessHeap(), 0, lenA + lenW*sizeof(WCHAR) );
 220         MultiByteToWideChar( CP_ACP, 0, name, lenA, classPtr->menuName, lenW );
 221         memcpy( classPtr->menuName + lenW, name, lenA );
 222     }
 223     else classPtr->menuName = (LPWSTR)name;
 224 }
 225
 226
 227 /***********************************************************************
 228  *           CLASS_SetMenuNameW
 229  *
 230  * Set the menu name in a class structure by copying the string.
 231  */
 232 static void CLASS_SetMenuNameW( CLASS *classPtr, LPCWSTR name )
 233 {
 234     UnMapLS( classPtr->segMenuName );
 235     classPtr->segMenuName = 0;
 236     if (HIWORD(classPtr->menuName)) HeapFree( GetProcessHeap(), 0, classPtr->menuName );
 237     if (HIWORD(name))
 238     {
 239         DWORD lenW = strlenW(name) + 1;
 240         DWORD lenA = WideCharToMultiByte( CP_ACP, 0, name, lenW, NULL, 0, NULL, NULL );
 241         classPtr->menuName = HeapAlloc( GetProcessHeap(), 0, lenA + lenW*sizeof(WCHAR) );
 242         memcpy( classPtr->menuName, name, lenW*sizeof(WCHAR) );
 243         WideCharToMultiByte( CP_ACP, 0, name, lenW,
 244                              (char *)(classPtr->menuName + lenW), lenA, NULL, NULL );
 245     }
 246     else classPtr->menuName = (LPWSTR)name;
 247 }
 248
 249
 250 /***********************************************************************
 251  *           CLASS_FreeClass
 252  *
 253  * Free a class structure.
 254  */
 255 static BOOL CLASS_FreeClass( CLASS *classPtr )
 256 {
 257     TRACE("%p\n", classPtr);
 258
 259     /* Check if we can remove this class */
 260
 261     if (classPtr->cWindows > 0)
 262     {
 263         SetLastError( ERROR_CLASS_HAS_WINDOWS );
 264         return FALSE;
 265     }
 266
 267     /* Remove the class from the linked list */
 268
 269     if (classPtr->next) classPtr->next->prev = classPtr->prev;
 270     if (classPtr->prev) classPtr->prev->next = classPtr->next;
 271     else firstClass = classPtr->next;
 272
 273     /* Delete the class */
 274
 275     if (classPtr->dce) DCE_FreeDCE( classPtr->dce );
 276     if (classPtr->hbrBackground > (HBRUSH)(COLOR_GRADIENTINACTIVECAPTION + 1))
 277         DeleteObject( classPtr->hbrBackground );
 278     GlobalDeleteAtom( classPtr->atomName );
 279     WINPROC_FreeProc( classPtr->winprocA, WIN_PROC_CLASS );
 280     WINPROC_FreeProc( classPtr->winprocW, WIN_PROC_CLASS );
 281     UnMapLS( classPtr->segMenuName );
 282     HeapFree( GetProcessHeap(), 0, classPtr->menuName );
 283     HeapFree( GetProcessHeap(), 0, classPtr );
 284     return TRUE;
 285 }
 286
 287
 288 /***********************************************************************
 289  *           CLASS_FreeModuleClasses
 290  */
 291 void CLASS_FreeModuleClasses( HMODULE16 hModule )
 292 {
 293     CLASS *ptr, *next;
 294
 295     TRACE("0x%08x\n", hModule);
 296
 297     USER_Lock();
 298     for (ptr = firstClass; ptr; ptr = next)
 299     {
 300         next = ptr->next;
 301         if (ptr->hInstance == HINSTANCE_32(hModule)) CLASS_FreeClass( ptr );
 302     }
 303     USER_Unlock();
 304 }
 305
 306
 307 /***********************************************************************
 308  *           CLASS_FindClassByAtom
 309  *
 310  * Return a pointer to the class.
 311  * hinstance has been normalized by the caller.
 312  *
 313  * NOTES
 314  *  980805 a local class will be found now if registred with hInst=0
 315  *  and looed up with a hInst!=0. msmoney does it (jsch)
 316  *
 317  *  Local class registered with a USER instance handle are found as if
 318  *  they were global classes.
 319  */
 320 static CLASS *CLASS_FindClassByAtom( ATOM atom, HINSTANCE hinstance )
 321 {
 322     CLASS * class, *tclass = 0, *user_class = 0;
 323     HINSTANCE16 hUser = GetModuleHandle16("USER");
 324
 325     TRACE("0x%08x %p\n", atom, hinstance);
 326
 327     /* First search task-specific classes */
 328
 329     for (class = firstClass; (class); class = class->next)
 330     {
 331         if (class->style & CS_GLOBALCLASS) continue;
 332         if (class->atomName == atom)
 333         {
 334             if (hinstance==class->hInstance || hinstance == (HINSTANCE)0xffff)
 335             {
 336                 TRACE("-- found local %p\n", class);
 337                 return class;
 338             }
 339             if (class->hInstance == 0) tclass = class;
 340             else if(class->hInstance == HINSTANCE_32(hUser))
 341             {
 342                 user_class = class;
 343             }
 344         }
 345     }
 346
 347     /* Then search global classes */
 348
 349     for (class = firstClass; (class); class = class->next)
 350     {
 351         if (!(class->style & CS_GLOBALCLASS)) continue;
 352         if (class->atomName == atom)
 353         {
 354             TRACE("-- found global %p\n", class);
 355             return class;
 356         }
 357     }
 358
 359     /* Check if there was a local class registered with USER */
 360     if( user_class )
 361     {
 362         TRACE("--found local USER class %p\n", user_class);
 363         return user_class;
 364     }
 365
 366     /* Then check if there was a local class with hInst=0*/
 367     if ( tclass )
 368     {
 369         WARN("-- found local Class registred with hInst=0\n");
 370         return tclass;
 371     }
 372
 373     TRACE("-- not found\n");
 374     return 0;
 375 }
 376
 377
 378 /***********************************************************************
 379  *           CLASS_RegisterClass
 380  *
 381  * The real RegisterClass() functionality.
 382  */
 383 static CLASS *CLASS_RegisterClass( ATOM atom, HINSTANCE hInstance,
 384                                    DWORD style, INT classExtra, INT winExtra )
 385 {
 386     CLASS *classPtr;
 387
 388     TRACE("atom=0x%x hinst=%p style=0x%lx clExtr=0x%x winExtr=0x%x\n",
 389           atom, hInstance, style, classExtra, winExtra );
 390
 391    /* Check if a class with this name already exists */
 392     classPtr = CLASS_FindClassByAtom( atom, hInstance );
 393     if (classPtr)
 394     {
 395         /* Class can be created only if it is local and */
 396         /* if the class with the same name is global.   */
 397
 398         if ((style & CS_GLOBALCLASS) || !(classPtr->style & CS_GLOBALCLASS))
 399         {
 400             SetLastError( ERROR_CLASS_ALREADY_EXISTS );
 401             return NULL;
 402         }
 403     }
 404
 405     /* Fix the extra bytes value */
 406
 407     if (classExtra < 0) classExtra = 0;
 408     else if (classExtra > 40)  /* Extra bytes are limited to 40 in Win32 */
 409         WARN("Class extra bytes %d is > 40\n", classExtra);
 410     if (winExtra < 0) winExtra = 0;
 411     else if (winExtra > 40)    /* Extra bytes are limited to 40 in Win32 */
 412         WARN("Win extra bytes %d is > 40\n", winExtra );
 413
 414     /* Create the class */
 415
 416     classPtr = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(CLASS) + classExtra );
 417     if (!classPtr) return NULL;
 418     classPtr->style       = style;
 419     classPtr->cbWndExtra  = winExtra;
 420     classPtr->cbClsExtra  = classExtra;
 421     classPtr->hInstance   = hInstance;
 422     classPtr->atomName    = atom;
 423     classPtr->dce         = (style & CS_CLASSDC) ? DCE_AllocDCE( 0, DCE_CLASS_DC ) : NULL;
 424
 425     /* Other non-null values must be set by caller */
 426
 427     if ((classPtr->next = firstClass)) firstClass->prev = classPtr;
 428     firstClass = classPtr;
 429     return classPtr;
 430 }
 431
 432
 433 /***********************************************************************
 434  *           CLASS_UnregisterClass
 435  *
 436  * The real UnregisterClass() functionality.
 437  */
 438 static BOOL CLASS_UnregisterClass( ATOM atom, HINSTANCE hInstance )
 439 {
 440     CLASS *classPtr;
 441     BOOL ret = FALSE;
 442
 443     USER_Lock();
 444     if (atom &&
 445         (classPtr = CLASS_FindClassByAtom( atom, hInstance )) &&
 446         (!hInstance || classPtr->hInstance == hInstance))
 447     {
 448         ret = CLASS_FreeClass( classPtr );
 449     }
 450     else SetLastError( ERROR_CLASS_DOES_NOT_EXIST );
 451
 452     USER_Unlock();
 453     return ret;
 454 }
 455
 456
 457 /***********************************************************************
 458  *           CLASS_RegisterBuiltinClass
 459  *
 460  * Register a builtin control class.
 461  * This allows having both ASCII and Unicode winprocs for the same class.
 462  */
 463 ATOM CLASS_RegisterBuiltinClass( const struct builtin_class_descr *descr )
 464 {
 465     ATOM atom;
 466     CLASS *classPtr;
 467
 468     if (!(atom = GlobalAddAtomA( descr->name ))) return 0;
 469
 470     if (!(classPtr = CLASS_RegisterClass( atom, 0, descr->style, 0, descr->extra )))
 471     {
 472         GlobalDeleteAtom( atom );
 473         return 0;
 474     }
 475
 476     classPtr->hCursor       = LoadCursorA( 0, descr->cursor );
 477     classPtr->hbrBackground = descr->brush;
 478
 479     if (descr->procA) WINPROC_SetProc( &classPtr->winprocA, descr->procA,
 480                                        WIN_PROC_32A, WIN_PROC_CLASS );
 481     if (descr->procW) WINPROC_SetProc( &classPtr->winprocW, descr->procW,
 482                                        WIN_PROC_32W, WIN_PROC_CLASS );
 483     return atom;
 484 }
 485
 486
 487 /***********************************************************************
 488  *           CLASS_AddWindow
 489  *
 490  * Add a new window using this class, and return the necessary
 491  * information for creating the window.
 492  */
 493 CLASS *CLASS_AddWindow( ATOM atom, HINSTANCE inst, WINDOWPROCTYPE type,
 494                         INT *winExtra, WNDPROC *winproc, DWORD *style, struct tagDCE **dce )
 495 {
 496     CLASS *class;
 497     if (type == WIN_PROC_16) inst = HINSTANCE_32(GetExePtr(HINSTANCE_16(inst)));
 498
 499     if (!(class = CLASS_FindClassByAtom( atom, inst ))) return NULL;
 500     class->cWindows++;
 501
 502     if (type == WIN_PROC_32W)
 503     {
 504         if (!(*winproc = class->winprocW)) *winproc = class->winprocA;
 505     }
 506     else
 507     {
 508         if (!(*winproc = class->winprocA)) *winproc = class->winprocW;
 509     }
 510     *winExtra = class->cbWndExtra;
 511     *style = class->style;
 512     *dce = class->dce;
 513     return class;
 514 }
 515
 516
 517 /***********************************************************************
 518  *           CLASS_RemoveWindow
 519  *
 520  * Remove a window from the class window count.
 521  */
 522 void CLASS_RemoveWindow( CLASS *cls )
 523 {
 524     if (cls && cls->cWindows) cls->cWindows--;
 525 }
 526
 527
 528 /***********************************************************************
 529  *              RegisterClass (USER.57)
 530  */
 531 ATOM WINAPI RegisterClass16( const WNDCLASS16 *wc )
 532 {
 533     ATOM atom;
 534     CLASS *classPtr;
 535     int iSmIconWidth, iSmIconHeight;
 536     HINSTANCE hInstance = HINSTANCE_32(GetExePtr(wc->hInstance));
 537
 538     if (!(atom = GlobalAddAtomA( MapSL(wc->lpszClassName) ))) return 0;
 539     if (!(classPtr = CLASS_RegisterClass( atom, hInstance, wc->style,
 540                                           wc->cbClsExtra, wc->cbWndExtra )))
 541     {
 542         GlobalDeleteAtom( atom );
 543         return 0;
 544     }
 545
 546     TRACE("atom=%04x wndproc=%08lx hinst=%p bg=%04x style=%08x clsExt=%d winExt=%d class=%p name='%s'\n",
 547           atom, (DWORD)wc->lpfnWndProc, hInstance,
 548           wc->hbrBackground, wc->style, wc->cbClsExtra,
 549           wc->cbWndExtra, classPtr,
 550           HIWORD(wc->lpszClassName) ? (char *)MapSL(wc->lpszClassName) : "" );
 551
 552     iSmIconWidth  = GetSystemMetrics(SM_CXSMICON);
 553     iSmIconHeight = GetSystemMetrics(SM_CYSMICON);
 554
 555     classPtr->hIcon         = HICON_32(wc->hIcon);
 556     classPtr->hIconSm       = CopyImage(classPtr->hIcon, IMAGE_ICON,
 557                                         iSmIconWidth, iSmIconHeight,
 558                                         LR_COPYFROMRESOURCE);
 559     classPtr->hCursor       = HCURSOR_32(wc->hCursor);
 560     classPtr->hbrBackground = HBRUSH_32(wc->hbrBackground);
 561
 562     WINPROC_SetProc( &classPtr->winprocA, (WNDPROC)wc->lpfnWndProc,
 563                      WIN_PROC_16, WIN_PROC_CLASS );
 564     CLASS_SetMenuNameA( classPtr, MapSL(wc->lpszMenuName) );
 565
 566     return atom;
 567 }
 568
 569
 570 /***********************************************************************
 571  *              RegisterClassA (USER32.@)
 572  * RETURNS
 573  *      >0: Unique identifier
 574  *      0: Failure
 575  */
 576 ATOM WINAPI RegisterClassA( const WNDCLASSA* wc ) /* [in] Address of structure with class data */
 577 {
 578     ATOM atom;
 579     int iSmIconWidth, iSmIconHeight;
 580     CLASS *classPtr;
 581
 582     if (!(atom = GlobalAddAtomA( wc->lpszClassName ))) return 0;
 583
 584     if (!(classPtr = CLASS_RegisterClass( atom, wc->hInstance, wc->style,
 585                                           wc->cbClsExtra, wc->cbWndExtra )))
 586     {
 587         GlobalDeleteAtom( atom );
 588         return 0;
 589     }
 590
 591     TRACE("atom=%04x wndproc=%p hinst=%p bg=%p style=%08x clsExt=%d winExt=%d class=%p name='%s'\n",
 592           atom, wc->lpfnWndProc, wc->hInstance,
 593           wc->hbrBackground, wc->style, wc->cbClsExtra,
 594           wc->cbWndExtra, classPtr,
 595           HIWORD(wc->lpszClassName) ? wc->lpszClassName : "" );
 596
 597     iSmIconWidth  = GetSystemMetrics(SM_CXSMICON);
 598     iSmIconHeight = GetSystemMetrics(SM_CYSMICON);
 599
 600     classPtr->hIcon         = wc->hIcon;
 601     classPtr->hIconSm       = CopyImage(wc->hIcon, IMAGE_ICON,
 602                                         iSmIconWidth, iSmIconHeight,
 603                                         LR_COPYFROMRESOURCE);
 604     classPtr->hCursor       = wc->hCursor;
 605     classPtr->hbrBackground = wc->hbrBackground;
 606
 607     WINPROC_SetProc( &classPtr->winprocA, wc->lpfnWndProc,
 608                      WIN_PROC_32A, WIN_PROC_CLASS );
 609     CLASS_SetMenuNameA( classPtr, wc->lpszMenuName );
 610     return atom;
 611 }
 612
 613
 614 /***********************************************************************
 615  *              RegisterClassW (USER32.@)
 616  */
 617 ATOM WINAPI RegisterClassW( const WNDCLASSW* wc )
 618 {
 619     ATOM atom;
 620     int iSmIconWidth, iSmIconHeight;
 621     CLASS *classPtr;
 622
 623     if (!(atom = GlobalAddAtomW( wc->lpszClassName ))) return 0;
 624
 625     if (!(classPtr = CLASS_RegisterClass( atom, wc->hInstance, wc->style,
 626                                           wc->cbClsExtra, wc->cbWndExtra )))
 627     {
 628         GlobalDeleteAtom( atom );
 629         return 0;
 630     }
 631
 632     TRACE("atom=%04x wndproc=%p hinst=%p bg=%p style=%08x clsExt=%d winExt=%d class=%p\n",
 633           atom, wc->lpfnWndProc, wc->hInstance,
 634           wc->hbrBackground, wc->style, wc->cbClsExtra,
 635           wc->cbWndExtra, classPtr );
 636
 637     iSmIconWidth  = GetSystemMetrics(SM_CXSMICON);
 638     iSmIconHeight = GetSystemMetrics(SM_CYSMICON);
 639
 640     classPtr->hIcon         = wc->hIcon;
 641     classPtr->hIconSm       = CopyImage(wc->hIcon, IMAGE_ICON,
 642                                         iSmIconWidth, iSmIconHeight,
 643                                         LR_COPYFROMRESOURCE);
 644     classPtr->hCursor       = wc->hCursor;
 645     classPtr->hbrBackground = wc->hbrBackground;
 646
 647     WINPROC_SetProc( &classPtr->winprocW, wc->lpfnWndProc,
 648                      WIN_PROC_32W, WIN_PROC_CLASS );
 649     CLASS_SetMenuNameW( classPtr, wc->lpszMenuName );
 650     return atom;
 651 }
 652
 653
 654 /***********************************************************************
 655  *              RegisterClassEx (USER.397)
 656  */
 657 ATOM WINAPI RegisterClassEx16( const WNDCLASSEX16 *wc )
 658 {
 659     ATOM atom;
 660     CLASS *classPtr;
 661     HINSTANCE hInstance = HINSTANCE_32(GetExePtr( wc->hInstance ));
 662
 663     if (!(atom = GlobalAddAtomA( MapSL(wc->lpszClassName) ))) return 0;
 664     if (!(classPtr = CLASS_RegisterClass( atom, hInstance, wc->style,
 665                                           wc->cbClsExtra, wc->cbWndExtra )))
 666     {
 667         GlobalDeleteAtom( atom );
 668         return 0;
 669     }
 670
 671     TRACE("atom=%04x wndproc=%p hinst=%p bg=%04x style=%08x clsExt=%d winExt=%d class=%p\n",
 672           atom, wc->lpfnWndProc, hInstance,
 673           wc->hbrBackground, wc->style, wc->cbClsExtra,
 674           wc->cbWndExtra, classPtr );
 675
 676     classPtr->hIcon         = HICON_32(wc->hIcon);
 677     classPtr->hIconSm       = HICON_32(wc->hIconSm);
 678     classPtr->hCursor       = HCURSOR_32(wc->hCursor);
 679     classPtr->hbrBackground = HBRUSH_32(wc->hbrBackground);
 680
 681     WINPROC_SetProc( &classPtr->winprocA, (WNDPROC)wc->lpfnWndProc,
 682                      WIN_PROC_16, WIN_PROC_CLASS );
 683     CLASS_SetMenuNameA( classPtr, MapSL(wc->lpszMenuName) );
 684     return atom;
 685 }
 686
 687
 688 /***********************************************************************
 689  *              RegisterClassExA (USER32.@)
 690  */
 691 ATOM WINAPI RegisterClassExA( const WNDCLASSEXA* wc )
 692 {
 693     ATOM atom;
 694     CLASS *classPtr;
 695
 696     if (!(atom = GlobalAddAtomA( wc->lpszClassName ))) return 0;
 697
 698     if (!(classPtr = CLASS_RegisterClass( atom, wc->hInstance, wc->style,
 699                                           wc->cbClsExtra, wc->cbWndExtra )))
 700     {
 701         GlobalDeleteAtom( atom );
 702         return 0;
 703     }
 704
 705     TRACE("atom=%04x wndproc=%p hinst=%p bg=%p style=%08x clsExt=%d winExt=%d class=%p\n",
 706           atom, wc->lpfnWndProc, wc->hInstance,
 707           wc->hbrBackground, wc->style, wc->cbClsExtra,
 708           wc->cbWndExtra, classPtr );
 709
 710     classPtr->hIcon         = wc->hIcon;
 711     classPtr->hIconSm       = wc->hIconSm;
 712     classPtr->hCursor       = wc->hCursor;
 713     classPtr->hbrBackground = wc->hbrBackground;
 714     WINPROC_SetProc( &classPtr->winprocA, wc->lpfnWndProc, WIN_PROC_32A, WIN_PROC_CLASS );
 715     CLASS_SetMenuNameA( classPtr, wc->lpszMenuName );
 716     return atom;
 717 }
 718
 719
 720 /***********************************************************************
 721  *              RegisterClassExW (USER32.@)
 722  */
 723 ATOM WINAPI RegisterClassExW( const WNDCLASSEXW* wc )
 724 {
 725     ATOM atom;
 726     CLASS *classPtr;
 727
 728     if (!(atom = GlobalAddAtomW( wc->lpszClassName ))) return 0;
 729
 730     if (!(classPtr = CLASS_RegisterClass( atom, wc->hInstance, wc->style,
 731                                           wc->cbClsExtra, wc->cbWndExtra )))
 732     {
 733         GlobalDeleteAtom( atom );
 734         return 0;
 735     }
 736
 737     TRACE("atom=%04x wndproc=%p hinst=%p bg=%p style=%08x clsExt=%d winExt=%d class=%p\n",
 738           atom, wc->lpfnWndProc, wc->hInstance,
 739           wc->hbrBackground, wc->style, wc->cbClsExtra,
 740           wc->cbWndExtra, classPtr );
 741
 742     classPtr->hIcon         = wc->hIcon;
 743     classPtr->hIconSm       = wc->hIconSm;
 744     classPtr->hCursor       = wc->hCursor;
 745     classPtr->hbrBackground = wc->hbrBackground;
 746     WINPROC_SetProc( &classPtr->winprocW, wc->lpfnWndProc, WIN_PROC_32W, WIN_PROC_CLASS );
 747     CLASS_SetMenuNameW( classPtr, wc->lpszMenuName );
 748     return atom;
 749 }
 750
 751
 752 /***********************************************************************
 753  *              UnregisterClass (USER.403)
 754  */
 755 BOOL16 WINAPI UnregisterClass16( LPCSTR className, HINSTANCE16 hInstance )
 756 {
 757     return UnregisterClassA( className, HINSTANCE_32(GetExePtr( hInstance )) );
 758 }
 759
 760 /***********************************************************************
 761  *              UnregisterClassA (USER32.@)
 762  *
 763  */
 764 BOOL WINAPI UnregisterClassA( LPCSTR className, HINSTANCE hInstance )
 765 {
 766     TRACE("%s %p\n",debugstr_a(className), hInstance);
 767     return CLASS_UnregisterClass( GlobalFindAtomA( className ), hInstance );
 768 }
 769
 770 /***********************************************************************
 771  *              UnregisterClassW (USER32.@)
 772  */
 773 BOOL WINAPI UnregisterClassW( LPCWSTR className, HINSTANCE hInstance )
 774 {
 775     TRACE("%s %p\n",debugstr_w(className), hInstance);
 776     return CLASS_UnregisterClass( GlobalFindAtomW( className ), hInstance );
 777 }
 778
 779
 780 /***********************************************************************
 781  *              GetClassWord (USER32.@)
 782  */
 783 WORD WINAPI GetClassWord( HWND hwnd, INT offset )
 784 {
 785     CLASS *class;
 786     WORD retvalue = 0;
 787
 788     if (offset < 0) return GetClassLongA( hwnd, offset );
 789
 790     TRACE("%p %x\n",hwnd, offset);
 791
 792     if (!(class = get_class_ptr( hwnd, FALSE ))) return 0;
 793
 794     if (offset <= class->cbClsExtra - sizeof(WORD))
 795         memcpy( &retvalue, (char *)(class + 1) + offset, sizeof(retvalue) );
 796     else
 797         SetLastError( ERROR_INVALID_INDEX );
 798     release_class_ptr( class );
 799     return retvalue;
 800 }
 801
 802
 803 /***********************************************************************
 804  *              GetClassLong (USER.131)
 805  */
 806 LONG WINAPI GetClassLong16( HWND16 hwnd16, INT16 offset )
 807 {
 808     CLASS *class;
 809     LONG ret;
 810     HWND hwnd = (HWND)(ULONG_PTR)hwnd16;  /* no need for full handle */
 811
 812     TRACE("%p %d\n",hwnd, offset);
 813
 814     switch( offset )
 815     {
 816     case GCL_WNDPROC:
 817         if (!(class = get_class_ptr( hwnd, FALSE ))) return 0;
 818         ret = (LONG)CLASS_GetProc( class, WIN_PROC_16 );
 819         release_class_ptr( class );
 820         return ret;
 821     case GCL_MENUNAME:
 822         if (!(class = get_class_ptr( hwnd, FALSE ))) return 0;
 823         ret = (LONG)CLASS_GetMenuName16( class );
 824         release_class_ptr( class );
 825         return ret;
 826     default:
 827         return GetClassLongA( hwnd, offset );
 828     }
 829 }
 830
 831
 832 /***********************************************************************
 833  *              GetClassLongW (USER32.@)
 834  */
 835 LONG WINAPI GetClassLongW( HWND hwnd, INT offset )
 836 {
 837     CLASS *class;
 838     LONG retvalue = 0;
 839
 840     TRACE("%p %d\n", hwnd, offset);
 841
 842     if (!(class = get_class_ptr( hwnd, FALSE ))) return 0;
 843
 844     if (offset >= 0)
 845     {
 846         if (offset <= class->cbClsExtra - sizeof(LONG))
 847             memcpy( &retvalue, (char *)(class + 1) + offset, sizeof(retvalue) );
 848         else
 849             SetLastError( ERROR_INVALID_INDEX );
 850         release_class_ptr( class );
 851         return retvalue;
 852     }
 853
 854     switch(offset)
 855     {
 856     case GCL_HBRBACKGROUND:
 857         retvalue = (LONG)class->hbrBackground;
 858         break;
 859     case GCL_HCURSOR:
 860         retvalue = (LONG)class->hCursor;
 861         break;
 862     case GCL_HICON:
 863         retvalue = (LONG)class->hIcon;
 864         break;
 865     case GCL_HICONSM:
 866         retvalue = (LONG)class->hIconSm;
 867         break;
 868     case GCL_STYLE:
 869         retvalue = (LONG)class->style;
 870         break;
 871     case GCL_CBWNDEXTRA:
 872         retvalue = (LONG)class->cbWndExtra;
 873         break;
 874     case GCL_CBCLSEXTRA:
 875         retvalue = (LONG)class->cbClsExtra;
 876         break;
 877     case GCL_HMODULE:
 878         retvalue = (LONG)class->hInstance;
 879         break;
 880     case GCL_WNDPROC:
 881         retvalue = (LONG)CLASS_GetProc( class, WIN_PROC_32W );
 882         break;
 883     case GCL_MENUNAME:
 884         retvalue = (LONG)CLASS_GetMenuNameW( class );
 885         break;
 886     case GCW_ATOM:
 887         retvalue = (DWORD)class->atomName;
 888         break;
 889     default:
 890         SetLastError( ERROR_INVALID_INDEX );
 891         break;
 892     }
 893     release_class_ptr( class );
 894     return retvalue;
 895 }
 896
 897
 898 /***********************************************************************
 899  *              GetClassLongA (USER32.@)
 900  */
 901 LONG WINAPI GetClassLongA( HWND hwnd, INT offset )
 902 {
 903     CLASS *class;
 904     LONG retvalue;
 905
 906     if (offset != GCL_WNDPROC && offset != GCL_MENUNAME)
 907         return GetClassLongW( hwnd, offset );
 908
 909     TRACE("%p %d\n", hwnd, offset);
 910
 911     if (!(class = get_class_ptr( hwnd, FALSE ))) return 0;
 912
 913     if (offset == GCL_WNDPROC)
 914         retvalue = (LONG)CLASS_GetProc( class, WIN_PROC_32A );
 915     else  /* GCL_MENUNAME */
 916         retvalue = (LONG)CLASS_GetMenuNameA( class );
 917
 918     release_class_ptr( class );
 919     return retvalue;
 920 }
 921
 922
 923 /***********************************************************************
 924  *              SetClassWord (USER32.@)
 925  */
 926 WORD WINAPI SetClassWord( HWND hwnd, INT offset, WORD newval )
 927 {
 928     CLASS *class;
 929     WORD retval = 0;
 930
 931     if (offset < 0) return SetClassLongA( hwnd, offset, (DWORD)newval );
 932
 933     TRACE("%p %d %x\n", hwnd, offset, newval);
 934
 935     if (!(class = get_class_ptr( hwnd, TRUE ))) return 0;
 936
 937     if (offset <= class->cbClsExtra - sizeof(WORD))
 938     {
 939         void *ptr = (char *)(class + 1) + offset;
 940         memcpy( &retval, ptr, sizeof(retval) );
 941         memcpy( ptr, &newval, sizeof(newval) );
 942     }
 943     else SetLastError( ERROR_INVALID_INDEX );
 944
 945     release_class_ptr( class );
 946     return retval;
 947 }
 948
 949
 950 /***********************************************************************
 951  *              SetClassLong (USER.132)
 952  */
 953 LONG WINAPI SetClassLong16( HWND16 hwnd16, INT16 offset, LONG newval )
 954 {
 955     CLASS *class;
 956     LONG retval;
 957     HWND hwnd = (HWND)(ULONG_PTR)hwnd16;  /* no need for full handle */
 958
 959     TRACE("%p %d %lx\n", hwnd, offset, newval);
 960
 961     switch(offset)
 962     {
 963     case GCL_WNDPROC:
 964         if (!(class = get_class_ptr( hwnd, TRUE ))) return 0;
 965         retval = (LONG)CLASS_SetProc( class, (WNDPROC)newval, WIN_PROC_16 );
 966         release_class_ptr( class );
 967         return retval;
 968     case GCL_MENUNAME:
 969         newval = (LONG)MapSL( newval );
 970         /* fall through */
 971     default:
 972         return SetClassLongA( hwnd, offset, newval );
 973     }
 974 }
 975
 976
 977 /***********************************************************************
 978  *              SetClassLongW (USER32.@)
 979  */
 980 LONG WINAPI SetClassLongW( HWND hwnd, INT offset, LONG newval )
 981 {
 982     CLASS *class;
 983     LONG retval = 0;
 984
 985     TRACE("%p %d %lx\n", hwnd, offset, newval);
 986
 987     if (!(class = get_class_ptr( hwnd, TRUE ))) return 0;
 988
 989     if (offset >= 0)
 990     {
 991         if (offset <= class->cbClsExtra - sizeof(LONG))
 992         {
 993             void *ptr = (char *)(class + 1) + offset;
 994             memcpy( &retval, ptr, sizeof(retval) );
 995             memcpy( ptr, &newval, sizeof(newval) );
 996         }
 997         else SetLastError( ERROR_INVALID_INDEX );
 998     }
 999     else switch(offset)
1000     {
1001     case GCL_MENUNAME:
1002         CLASS_SetMenuNameW( class, (LPCWSTR)newval );
1003         retval = 0;  /* Old value is now meaningless anyway */
1004         break;
1005     case GCL_WNDPROC:
1006         retval = (LONG)CLASS_SetProc( class, (WNDPROC)newval, WIN_PROC_32W );
1007         break;
1008     case GCL_HBRBACKGROUND:
1009         retval = (LONG)class->hbrBackground;
1010         class->hbrBackground = (HBRUSH)newval;
1011         break;
1012     case GCL_HCURSOR:
1013         retval = (LONG)class->hCursor;
1014         class->hCursor = (HCURSOR)newval;
1015         break;
1016     case GCL_HICON:
1017         retval = (LONG)class->hIcon;
1018         class->hIcon = (HICON)newval;
1019         break;
1020     case GCL_HICONSM:
1021         retval = (LONG)class->hIconSm;
1022         class->hIconSm = (HICON)newval;
1023         break;
1024     case GCL_STYLE:
1025         retval = (LONG)class->style;
1026         class->style = newval;
1027         break;
1028     case GCL_CBWNDEXTRA:
1029         retval = (LONG)class->cbWndExtra;
1030         class->cbWndExtra = newval;
1031         break;
1032     case GCL_HMODULE:
1033         retval = (LONG)class->hInstance;
1034         class->hInstance = (HINSTANCE)newval;
1035         break;
1036     case GCW_ATOM:
1037         retval = (DWORD)class->atomName;
1038         class->atomName = newval;
1039         break;
1040     case GCL_CBCLSEXTRA:  /* cannot change this one */
1041         SetLastError( ERROR_INVALID_PARAMETER );
1042         break;
1043     default:
1044         SetLastError( ERROR_INVALID_INDEX );
1045         break;
1046     }
1047     release_class_ptr( class );
1048     return retval;
1049 }
1050
1051
1052 /***********************************************************************
1053  *              SetClassLongA (USER32.@)
1054  */
1055 LONG WINAPI SetClassLongA( HWND hwnd, INT offset, LONG newval )
1056 {
1057     CLASS *class;
1058     LONG retval;
1059
1060     if (offset != GCL_WNDPROC && offset != GCL_MENUNAME)
1061         return SetClassLongW( hwnd, offset, newval );
1062
1063     TRACE("%p %d %lx\n", hwnd, offset, newval);
1064
1065     if (!(class = get_class_ptr( hwnd, TRUE ))) return 0;
1066
1067     if (offset == GCL_WNDPROC)
1068         retval = (LONG)CLASS_SetProc( class, (WNDPROC)newval, WIN_PROC_32A );
1069     else  /* GCL_MENUNAME */
1070     {
1071         CLASS_SetMenuNameA( class, (LPCSTR)newval );
1072         retval = 0;  /* Old value is now meaningless anyway */
1073     }
1074     release_class_ptr( class );
1075     return retval;
1076 }
1077
1078
1079 /***********************************************************************
1080  *              GetClassNameA (USER32.@)
1081  */
1082 INT WINAPI GetClassNameA( HWND hwnd, LPSTR buffer, INT count )
1083 {
1084     INT ret = GlobalGetAtomNameA( GetClassLongA( hwnd, GCW_ATOM ), buffer, count );
1085
1086     TRACE("%p %s %x\n",hwnd, debugstr_a(buffer), count);
1087     return ret;
1088 }
1089
1090
1091 /***********************************************************************
1092  *              GetClassNameW (USER32.@)
1093  */
1094 INT WINAPI GetClassNameW( HWND hwnd, LPWSTR buffer, INT count )
1095 {
1096     INT ret = GlobalGetAtomNameW( GetClassLongW( hwnd, GCW_ATOM ), buffer, count );
1097
1098     TRACE("%p %s %x\n",hwnd, debugstr_w(buffer), count);
1099     return ret;
1100 }
1101
1102
1103 /***********************************************************************
1104  *              GetClassInfo (USER.404)
1105  */
1106 BOOL16 WINAPI GetClassInfo16( HINSTANCE16 hInst16, SEGPTR name, WNDCLASS16 *wc )
1107 {
1108     ATOM atom;
1109     CLASS *classPtr;
1110     HINSTANCE hInstance = HINSTANCE_32(GetExePtr( hInst16 ));
1111
1112     TRACE("%p %s %p\n",hInstance, debugstr_a(MapSL(name)), wc);
1113
1114     if (!(atom = GlobalFindAtomA( MapSL(name) )) ||
1115         !(classPtr = CLASS_FindClassByAtom( atom, hInstance )))
1116         return FALSE;
1117     if ((hInstance != classPtr->hInstance) &&
1118         !(classPtr->style & CS_GLOBALCLASS)) /*BWCC likes to pass hInstance=0*/
1119         return FALSE;
1120     wc->style         = (UINT16)classPtr->style;
1121     wc->lpfnWndProc   = CLASS_GetProc( classPtr, WIN_PROC_16 );
1122     wc->cbClsExtra    = (INT16)classPtr->cbClsExtra;
1123     wc->cbWndExtra    = (INT16)classPtr->cbWndExtra;
1124     wc->hInstance     = classPtr->style & CS_GLOBALCLASS ? GetModuleHandle16("USER") : HINSTANCE_16(classPtr->hInstance);
1125     wc->hIcon         = HICON_16(classPtr->hIcon);
1126     wc->hCursor       = HCURSOR_16(classPtr->hCursor);
1127     wc->hbrBackground = HBRUSH_16(classPtr->hbrBackground);
1128     wc->lpszClassName = name;
1129     wc->lpszMenuName  = CLASS_GetMenuName16( classPtr );
1130     return TRUE;
1131 }
1132
1133
1134 /***********************************************************************
1135  *              GetClassInfoA (USER32.@)
1136  */
1137 BOOL WINAPI GetClassInfoA( HINSTANCE hInstance, LPCSTR name,
1138                                WNDCLASSA *wc )
1139 {
1140     ATOM atom;
1141     CLASS *classPtr;
1142
1143     TRACE("%p %p %p\n",hInstance, name, wc);
1144
1145     /* workaround: if hInstance=NULL you expect to get the system classes
1146     but this classes (as example from comctl32.dll SysListView) won't be
1147     registered with hInstance=NULL in WINE because of the late loading
1148     of this dll. fixes file dialogs in WinWord95 (jsch)*/
1149
1150     if (!(atom=GlobalFindAtomA(name)) || !(classPtr=CLASS_FindClassByAtom(atom,hInstance)))
1151         return FALSE;
1152
1153     if (!(classPtr->style & CS_GLOBALCLASS) &&
1154         classPtr->hInstance &&
1155         (hInstance != classPtr->hInstance))
1156     {
1157         if (hInstance) return FALSE;
1158         WARN("systemclass %s (hInst=0) demanded but only class with hInst!=0 found\n",name);
1159     }
1160
1161     wc->style         = classPtr->style;
1162     wc->lpfnWndProc   = (WNDPROC)CLASS_GetProc( classPtr, WIN_PROC_32A );
1163     wc->cbClsExtra    = classPtr->cbClsExtra;
1164     wc->cbWndExtra    = classPtr->cbWndExtra;
1165     wc->hInstance     = hInstance;
1166     wc->hIcon         = (HICON)classPtr->hIcon;
1167     wc->hCursor       = (HCURSOR)classPtr->hCursor;
1168     wc->hbrBackground = (HBRUSH)classPtr->hbrBackground;
1169     wc->lpszMenuName  = CLASS_GetMenuNameA( classPtr );
1170     wc->lpszClassName = name;
1171     return TRUE;
1172 }
1173
1174
1175 /***********************************************************************
1176  *              GetClassInfoW (USER32.@)
1177  */
1178 BOOL WINAPI GetClassInfoW( HINSTANCE hInstance, LPCWSTR name,
1179                                WNDCLASSW *wc )
1180 {
1181     ATOM atom;
1182     CLASS *classPtr;
1183
1184     TRACE("%p %p %p\n",hInstance, name, wc);
1185
1186     if (        !(atom=GlobalFindAtomW(name)) ||
1187                 !(classPtr=CLASS_FindClassByAtom(atom,hInstance))
1188     )
1189         return FALSE;
1190
1191     if (!(classPtr->style & CS_GLOBALCLASS) &&
1192         classPtr->hInstance &&
1193         (hInstance != classPtr->hInstance))
1194     {
1195         if (hInstance) return FALSE;
1196         WARN("systemclass %s (hInst=0) demanded but only class with hInst!=0 found\n",debugstr_w(name));
1197     }
1198     wc->style         = classPtr->style;
1199     wc->lpfnWndProc   = (WNDPROC)CLASS_GetProc( classPtr, WIN_PROC_32W );
1200     wc->cbClsExtra    = classPtr->cbClsExtra;
1201     wc->cbWndExtra    = classPtr->cbWndExtra;
1202     wc->hInstance     = hInstance;
1203     wc->hIcon         = (HICON)classPtr->hIcon;
1204     wc->hCursor       = (HCURSOR)classPtr->hCursor;
1205     wc->hbrBackground = (HBRUSH)classPtr->hbrBackground;
1206     wc->lpszMenuName  = CLASS_GetMenuNameW( classPtr );
1207     wc->lpszClassName = name;
1208     return TRUE;
1209 }
1210
1211
1212 /***********************************************************************
1213  *              GetClassInfoEx (USER.398)
1214  *
1215  * FIXME: this is just a guess, I have no idea if GetClassInfoEx() is the
1216  * same in Win16 as in Win32. --AJ
1217  */
1218 BOOL16 WINAPI GetClassInfoEx16( HINSTANCE16 hInst16, SEGPTR name, WNDCLASSEX16 *wc )
1219 {
1220     ATOM atom;
1221     CLASS *classPtr;
1222     HINSTANCE hInstance = HINSTANCE_32(GetExePtr( hInst16 ));
1223
1224     TRACE("%p %s %p\n",hInstance,debugstr_a( MapSL(name) ), wc);
1225
1226     if (!(atom = GlobalFindAtomA( MapSL(name) )) ||
1227         !(classPtr = CLASS_FindClassByAtom( atom, hInstance )) ||
1228         (hInstance != classPtr->hInstance)) return FALSE;
1229     wc->style         = classPtr->style;
1230     wc->lpfnWndProc   = CLASS_GetProc( classPtr, WIN_PROC_16 );
1231     wc->cbClsExtra    = (INT16)classPtr->cbClsExtra;
1232     wc->cbWndExtra    = (INT16)classPtr->cbWndExtra;
1233     wc->hInstance     = HINSTANCE_16(classPtr->hInstance);
1234     wc->hIcon         = HICON_16(classPtr->hIcon);
1235     wc->hIconSm       = HICON_16(classPtr->hIconSm);
1236     wc->hCursor       = HCURSOR_16(classPtr->hCursor);
1237     wc->hbrBackground = HBRUSH_16(classPtr->hbrBackground);
1238     wc->lpszClassName = (SEGPTR)0;
1239     wc->lpszMenuName  = CLASS_GetMenuName16( classPtr );
1240     wc->lpszClassName = name;
1241
1242     /* We must return the atom of the class here instead of just TRUE. */
1243     return atom;
1244 }
1245
1246
1247 /***********************************************************************
1248  *              GetClassInfoExA (USER32.@)
1249  */
1250 BOOL WINAPI GetClassInfoExA( HINSTANCE hInstance, LPCSTR name,
1251                                  WNDCLASSEXA *wc )
1252 {
1253     ATOM atom;
1254     CLASS *classPtr;
1255
1256     TRACE("%p %p %p\n",hInstance, name, wc);
1257
1258     if (!(atom = GlobalFindAtomA( name )) ||
1259         !(classPtr = CLASS_FindClassByAtom( atom, hInstance ))
1260         /*|| (hInstance != classPtr->hInstance) */ ) return FALSE;
1261     wc->style         = classPtr->style;
1262     wc->lpfnWndProc   = (WNDPROC)CLASS_GetProc( classPtr, WIN_PROC_32A );
1263     wc->cbClsExtra    = classPtr->cbClsExtra;
1264     wc->cbWndExtra    = classPtr->cbWndExtra;
1265     wc->hInstance     = classPtr->hInstance;
1266     wc->hIcon         = (HICON)classPtr->hIcon;
1267     wc->hIconSm       = (HICON)classPtr->hIconSm;
1268     wc->hCursor       = (HCURSOR)classPtr->hCursor;
1269     wc->hbrBackground = (HBRUSH)classPtr->hbrBackground;
1270     wc->lpszMenuName  = CLASS_GetMenuNameA( classPtr );
1271     wc->lpszClassName = name;
1272
1273     /* We must return the atom of the class here instead of just TRUE. */
1274     return atom;
1275 }
1276
1277
1278 /***********************************************************************
1279  *              GetClassInfoExW (USER32.@)
1280  */
1281 BOOL WINAPI GetClassInfoExW( HINSTANCE hInstance, LPCWSTR name,
1282                                  WNDCLASSEXW *wc )
1283 {
1284     ATOM atom;
1285     CLASS *classPtr;
1286
1287     TRACE("%p %p %p\n",hInstance, name, wc);
1288
1289     if (!(atom = GlobalFindAtomW( name )) ||
1290         !(classPtr = CLASS_FindClassByAtom( atom, hInstance )) ||
1291         (hInstance != classPtr->hInstance)) return FALSE;
1292     wc->style         = classPtr->style;
1293     wc->lpfnWndProc   = (WNDPROC)CLASS_GetProc( classPtr, WIN_PROC_32W );
1294     wc->cbClsExtra    = classPtr->cbClsExtra;
1295     wc->cbWndExtra    = classPtr->cbWndExtra;
1296     wc->hInstance     = classPtr->hInstance;
1297     wc->hIcon         = (HICON)classPtr->hIcon;
1298     wc->hIconSm       = (HICON)classPtr->hIconSm;
1299     wc->hCursor       = (HCURSOR)classPtr->hCursor;
1300     wc->hbrBackground = (HBRUSH)classPtr->hbrBackground;
1301     wc->lpszMenuName  = CLASS_GetMenuNameW( classPtr );
1302     wc->lpszClassName = name;
1303
1304     /* We must return the atom of the class here instead of just TRUE. */
1305     return atom;
1306 }
1307
1308
1309 #if 0  /* toolhelp is in kernel, so this cannot work */
1310
1311 /***********************************************************************
1312  *              ClassFirst (TOOLHELP.69)
1313  */
1314 BOOL16 WINAPI ClassFirst16( CLASSENTRY *pClassEntry )
1315 {
1316     TRACE("%p\n",pClassEntry);
1317     pClassEntry->wNext = 1;
1318     return ClassNext16( pClassEntry );
1319 }
1320
1321
1322 /***********************************************************************
1323  *              ClassNext (TOOLHELP.70)
1324  */
1325 BOOL16 WINAPI ClassNext16( CLASSENTRY *pClassEntry )
1326 {
1327     int i;
1328     CLASS *class = firstClass;
1329
1330     TRACE("%p\n",pClassEntry);
1331
1332     if (!pClassEntry->wNext) return FALSE;
1333     for (i = 1; (i < pClassEntry->wNext) && class; i++) class = class->next;
1334     if (!class)
1335     {
1336         pClassEntry->wNext = 0;
1337         return FALSE;
1338     }
1339     pClassEntry->hInst = class->hInstance;
1340     pClassEntry->wNext++;
1341     GlobalGetAtomNameA( class->atomName, pClassEntry->szClassName,
1342                           sizeof(pClassEntry->szClassName) );
1343     return TRUE;
1344 }
1345 #endif