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 "wine/unicode.h"
  41 #include "win.h"
  42 #include "user.h"
  43 #include "controls.h"
  44 #include "dce.h"
  45 #include "winproc.h"
  46 #include "wine/debug.h"
  47
  48 WINE_DEFAULT_DEBUG_CHANNEL(class);
  49
  50 typedef struct tagCLASS
  51 {
  52     struct tagCLASS *next;          /* Next class */
  53     struct tagCLASS *prev;          /* Prev class */
  54     UINT             cWindows;      /* Count of existing windows */
  55     UINT             style;         /* Class style */
  56     HWINDOWPROC      winprocA;      /* Window procedure (ASCII) */
  57     HWINDOWPROC      winprocW;      /* Window procedure (Unicode) */
  58     INT              cbClsExtra;    /* Class extra bytes */
  59     INT              cbWndExtra;    /* Window extra bytes */
  60     LPWSTR           menuName;      /* Default menu name (Unicode followed by ASCII) */
  61     SEGPTR           segMenuName;   /* Default menu name as SEGPTR */
  62     struct tagDCE   *dce;           /* Class DCE (if CS_CLASSDC) */
  63     HINSTANCE        hInstance;     /* Module that created the task */
  64     HICON            hIcon;         /* Default icon */
  65     HICON            hIconSm;       /* Default small icon */
  66     HCURSOR          hCursor;       /* Default cursor */
  67     HBRUSH           hbrBackground; /* Default background */
  68     ATOM             atomName;      /* Name of the class */
  69 } CLASS;
  70
  71 static CLASS *firstClass;
  72
  73 /***********************************************************************
  74  *           get_class_ptr
  75  */
  76 static CLASS *get_class_ptr( HWND hwnd, BOOL write_access )
  77 {
  78     WND *ptr = WIN_GetPtr( hwnd );
  79
  80     if (ptr)
  81     {
  82         if (ptr != WND_OTHER_PROCESS) return ptr->class;
  83         if (IsWindow( hwnd )) /* check other processes */
  84         {
  85             if (write_access)
  86             {
  87                 /* modifying classes in other processes is not allowed */
  88                 SetLastError( ERROR_ACCESS_DENIED );
  89                 return NULL;
  90             }
  91             FIXME( "reading from class of other process window %04x\n", hwnd );
  92             /* DbgBreakPoint(); */
  93         }
  94     }
  95     SetLastError( ERROR_INVALID_WINDOW_HANDLE );
  96     return NULL;
  97 }
  98
  99
 100 /***********************************************************************
 101  *           release_class_ptr
 102  */
 103 inline static void release_class_ptr( CLASS *ptr )
 104 {
 105     USER_Unlock();
 106 }
 107
 108
 109 /***********************************************************************
 110  *           CLASS_GetProc
 111  *
 112  * Get the class winproc for a given proc type
 113  */
 114 static WNDPROC16 CLASS_GetProc( CLASS *classPtr, WINDOWPROCTYPE type )
 115 {
 116     HWINDOWPROC proc = classPtr->winprocA;
 117
 118     if (classPtr->winprocW)
 119     {
 120         /* if we have a Unicode proc, use it if we have no ASCII proc
 121          * or if we have both and Unicode was requested
 122          */
 123         if (!proc || type == WIN_PROC_32W) proc = classPtr->winprocW;
 124     }
 125     return WINPROC_GetProc( proc, type );
 126 }
 127
 128
 129 /***********************************************************************
 130  *           CLASS_SetProc
 131  *
 132  * Set the class winproc for a given proc type.
 133  * Returns the previous window proc.
 134  */
 135 static WNDPROC16 CLASS_SetProc( CLASS *classPtr, WNDPROC newproc, WINDOWPROCTYPE type )
 136 {
 137     HWINDOWPROC *proc = &classPtr->winprocA;
 138     WNDPROC16 ret;
 139
 140     if (classPtr->winprocW)
 141     {
 142         /* if we have a Unicode proc, use it if we have no ASCII proc
 143          * or if we have both and Unicode was requested
 144          */
 145         if (!*proc || type == WIN_PROC_32W) proc = &classPtr->winprocW;
 146     }
 147     ret = WINPROC_GetProc( *proc, type );
 148     WINPROC_SetProc( proc, (HWINDOWPROC)newproc, type, WIN_PROC_CLASS );
 149     /* now free the one that we didn't set */
 150     if (classPtr->winprocA && classPtr->winprocW)
 151     {
 152         if (proc == &classPtr->winprocA)
 153         {
 154             WINPROC_FreeProc( classPtr->winprocW, WIN_PROC_CLASS );
 155             classPtr->winprocW = 0;
 156         }
 157         else
 158         {
 159             WINPROC_FreeProc( classPtr->winprocA, WIN_PROC_CLASS );
 160             classPtr->winprocA = 0;
 161         }
 162     }
 163     return ret;
 164 }
 165
 166
 167 /***********************************************************************
 168  *           CLASS_GetMenuNameA
 169  *
 170  * Get the menu name as a ASCII string.
 171  */
 172 inline static LPSTR CLASS_GetMenuNameA( CLASS *classPtr )
 173 {
 174     if (!HIWORD(classPtr->menuName)) return (LPSTR)classPtr->menuName;
 175     return (LPSTR)(classPtr->menuName + strlenW(classPtr->menuName) + 1);
 176 }
 177
 178
 179 /***********************************************************************
 180  *           CLASS_GetMenuName16
 181  *
 182  * Get the menu name as a SEGPTR.
 183  */
 184 inline static SEGPTR CLASS_GetMenuName16( CLASS *classPtr )
 185 {
 186     if (!HIWORD(classPtr->menuName)) return (SEGPTR)classPtr->menuName;
 187     if (!classPtr->segMenuName)
 188         classPtr->segMenuName = MapLS( CLASS_GetMenuNameA(classPtr) );
 189     return classPtr->segMenuName;
 190 }
 191
 192
 193 /***********************************************************************
 194  *           CLASS_GetMenuNameW
 195  *
 196  * Get the menu name as a Unicode string.
 197  */
 198 inline static LPWSTR CLASS_GetMenuNameW( CLASS *classPtr )
 199 {
 200     return classPtr->menuName;
 201 }
 202
 203
 204 /***********************************************************************
 205  *           CLASS_SetMenuNameA
 206  *
 207  * Set the menu name in a class structure by copying the string.
 208  */
 209 static void CLASS_SetMenuNameA( CLASS *classPtr, LPCSTR name )
 210 {
 211     UnMapLS( classPtr->segMenuName );
 212     classPtr->segMenuName = 0;
 213     if (HIWORD(classPtr->menuName)) HeapFree( GetProcessHeap(), 0, classPtr->menuName );
 214     if (HIWORD(name))
 215     {
 216         DWORD lenA = strlen(name) + 1;
 217         DWORD lenW = MultiByteToWideChar( CP_ACP, 0, name, lenA, NULL, 0 );
 218         classPtr->menuName = HeapAlloc( GetProcessHeap(), 0, lenA + lenW*sizeof(WCHAR) );
 219         MultiByteToWideChar( CP_ACP, 0, name, lenA, classPtr->menuName, lenW );
 220         memcpy( classPtr->menuName + lenW, name, lenA );
 221     }
 222     else classPtr->menuName = (LPWSTR)name;
 223 }
 224
 225
 226 /***********************************************************************
 227  *           CLASS_SetMenuNameW
 228  *
 229  * Set the menu name in a class structure by copying the string.
 230  */
 231 static void CLASS_SetMenuNameW( CLASS *classPtr, LPCWSTR name )
 232 {
 233     UnMapLS( classPtr->segMenuName );
 234     classPtr->segMenuName = 0;
 235     if (HIWORD(classPtr->menuName)) HeapFree( GetProcessHeap(), 0, classPtr->menuName );
 236     if (HIWORD(name))
 237     {
 238         DWORD lenW = strlenW(name) + 1;
 239         DWORD lenA = WideCharToMultiByte( CP_ACP, 0, name, lenW, NULL, 0, NULL, NULL );
 240         classPtr->menuName = HeapAlloc( GetProcessHeap(), 0, lenA + lenW*sizeof(WCHAR) );
 241         memcpy( classPtr->menuName, name, lenW*sizeof(WCHAR) );
 242         WideCharToMultiByte( CP_ACP, 0, name, lenW,
 243                              (char *)(classPtr->menuName + lenW), lenA, NULL, NULL );
 244     }
 245     else classPtr->menuName = (LPWSTR)name;
 246 }
 247
 248
 249 /***********************************************************************
 250  *           CLASS_FreeClass
 251  *
 252  * Free a class structure.
 253  */
 254 static BOOL CLASS_FreeClass( CLASS *classPtr )
 255 {
 256     TRACE("%p\n", classPtr);
 257
 258     /* Check if we can remove this class */
 259
 260     if (classPtr->cWindows > 0)
 261     {
 262         SetLastError( ERROR_CLASS_HAS_WINDOWS );
 263         return FALSE;
 264     }
 265
 266     /* Remove the class from the linked list */
 267
 268     if (classPtr->next) classPtr->next->prev = classPtr->prev;
 269     if (classPtr->prev) classPtr->prev->next = classPtr->next;
 270     else firstClass = classPtr->next;
 271
 272     /* Delete the class */
 273
 274     if (classPtr->dce) DCE_FreeDCE( classPtr->dce );
 275     if (classPtr->hbrBackground > (HBRUSH)(COLOR_GRADIENTINACTIVECAPTION + 1))
 276         DeleteObject( classPtr->hbrBackground );
 277     GlobalDeleteAtom( classPtr->atomName );
 278     WINPROC_FreeProc( classPtr->winprocA, WIN_PROC_CLASS );
 279     WINPROC_FreeProc( classPtr->winprocW, WIN_PROC_CLASS );
 280     UnMapLS( classPtr->segMenuName );
 281     HeapFree( GetProcessHeap(), 0, classPtr->menuName );
 282     HeapFree( GetProcessHeap(), 0, classPtr );
 283     return TRUE;
 284 }
 285
 286
 287 /***********************************************************************
 288  *           CLASS_FreeModuleClasses
 289  */
 290 void CLASS_FreeModuleClasses( HMODULE16 hModule )
 291 {
 292     CLASS *ptr, *next;
 293
 294     TRACE("0x%08x\n", hModule);
 295
 296     USER_Lock();
 297     for (ptr = firstClass; ptr; ptr = next)
 298     {
 299         next = ptr->next;
 300         if (ptr->hInstance == hModule) CLASS_FreeClass( ptr );
 301     }
 302     USER_Unlock();
 303 }
 304
 305
 306 /***********************************************************************
 307  *           CLASS_FindClassByAtom
 308  *
 309  * Return a pointer to the class.
 310  * hinstance has been normalized by the caller.
 311  *
 312  * NOTES
 313  *  980805 a local class will be found now if registred with hInst=0
 314  *  and looed up with a hInst!=0. msmoney does it (jsch)
 315  *
 316  *  Local class registered with a USER instance handle are found as if
 317  *  they were global classes.
 318  */
 319 static CLASS *CLASS_FindClassByAtom( ATOM atom, HINSTANCE hinstance )
 320 {
 321     CLASS * class, *tclass = 0, *user_class = 0;
 322     HINSTANCE16 hUser = GetModuleHandle16("USER");
 323
 324     TRACE("0x%08x 0x%08x\n", atom, hinstance);
 325
 326     /* First search task-specific classes */
 327
 328     for (class = firstClass; (class); class = class->next)
 329     {
 330         if (class->style & CS_GLOBALCLASS) continue;
 331         if (class->atomName == atom)
 332         {
 333             if (hinstance==class->hInstance || hinstance==0xffff)
 334             {
 335                 TRACE("-- found local %p\n", class);
 336                 return class;
 337             }
 338             if (class->hInstance == 0) tclass = class;
 339             else if(class->hInstance == hUser)
 340             {
 341                 user_class = class;
 342             }
 343         }
 344     }
 345
 346     /* Then search global classes */
 347
 348     for (class = firstClass; (class); class = class->next)
 349     {
 350         if (!(class->style & CS_GLOBALCLASS)) continue;
 351         if (class->atomName == atom)
 352         {
 353             TRACE("-- found global %p\n", class);
 354             return class;
 355         }
 356     }
 357
 358     /* Check if there was a local class registered with USER */
 359     if( user_class )
 360     {
 361         TRACE("--found local USER class %p\n", user_class);
 362         return user_class;
 363     }
 364
 365     /* Then check if there was a local class with hInst=0*/
 366     if ( tclass )
 367     {
 368         WARN("-- found local Class registred with hInst=0\n");
 369         return tclass;
 370     }
 371
 372     TRACE("-- not found\n");
 373     return 0;
 374 }
 375
 376
 377 /***********************************************************************
 378  *           CLASS_RegisterClass
 379  *
 380  * The real RegisterClass() functionality.
 381  */
 382 static CLASS *CLASS_RegisterClass( ATOM atom, HINSTANCE hInstance,
 383                                    DWORD style, INT classExtra, INT winExtra )
 384 {
 385     CLASS *classPtr;
 386
 387     TRACE("atom=0x%x hinst=0x%x style=0x%lx clExtr=0x%x winExtr=0x%x\n",
 388           atom, hInstance, style, classExtra, winExtra );
 389
 390    /* Check if a class with this name already exists */
 391     classPtr = CLASS_FindClassByAtom( atom, hInstance );
 392     if (classPtr)
 393     {
 394         /* Class can be created only if it is local and */
 395         /* if the class with the same name is global.   */
 396
 397         if ((style & CS_GLOBALCLASS) || !(classPtr->style & CS_GLOBALCLASS))
 398         {
 399             SetLastError( ERROR_CLASS_ALREADY_EXISTS );
 400             return NULL;
 401         }
 402     }
 403
 404     /* Fix the extra bytes value */
 405
 406     if (classExtra < 0) classExtra = 0;
 407     else if (classExtra > 40)  /* Extra bytes are limited to 40 in Win32 */
 408         WARN("Class extra bytes %d is > 40\n", classExtra);
 409     if (winExtra < 0) winExtra = 0;
 410     else if (winExtra > 40)    /* Extra bytes are limited to 40 in Win32 */
 411         WARN("Win extra bytes %d is > 40\n", winExtra );
 412
 413     /* Create the class */
 414
 415     classPtr = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(CLASS) + classExtra );
 416     if (!classPtr) return NULL;
 417     classPtr->style       = style;
 418     classPtr->cbWndExtra  = winExtra;
 419     classPtr->cbClsExtra  = classExtra;
 420     classPtr->hInstance   = hInstance;
 421     classPtr->atomName    = atom;
 422     classPtr->dce         = (style & CS_CLASSDC) ? DCE_AllocDCE( 0, DCE_CLASS_DC ) : NULL;
 423
 424     /* Other non-null values must be set by caller */
 425
 426     if ((classPtr->next = firstClass)) firstClass->prev = classPtr;
 427     firstClass = classPtr;
 428     return classPtr;
 429 }
 430
 431
 432 /***********************************************************************
 433  *           CLASS_UnregisterClass
 434  *
 435  * The real UnregisterClass() functionality.
 436  */
 437 static BOOL CLASS_UnregisterClass( ATOM atom, HINSTANCE hInstance )
 438 {
 439     CLASS *classPtr;
 440     BOOL ret = FALSE;
 441
 442     USER_Lock();
 443     if (atom &&
 444         (classPtr = CLASS_FindClassByAtom( atom, hInstance )) &&
 445         (!hInstance || classPtr->hInstance == hInstance))
 446     {
 447         ret = CLASS_FreeClass( classPtr );
 448     }
 449     else SetLastError( ERROR_CLASS_DOES_NOT_EXIST );
 450
 451     USER_Unlock();
 452     return ret;
 453 }
 454
 455
 456 /***********************************************************************
 457  *           CLASS_RegisterBuiltinClass
 458  *
 459  * Register a builtin control class.
 460  * This allows having both ASCII and Unicode winprocs for the same class.
 461  */
 462 ATOM CLASS_RegisterBuiltinClass( const struct builtin_class_descr *descr )
 463 {
 464     ATOM atom;
 465     CLASS *classPtr;
 466
 467     if (!(atom = GlobalAddAtomA( descr->name ))) return 0;
 468
 469     if (!(classPtr = CLASS_RegisterClass( atom, 0, descr->style, 0, descr->extra )))
 470     {
 471         GlobalDeleteAtom( atom );
 472         return 0;
 473     }
 474
 475     classPtr->hCursor       = LoadCursorA( 0, descr->cursor );
 476     classPtr->hbrBackground = descr->brush;
 477
 478     if (descr->procA) WINPROC_SetProc( &classPtr->winprocA, (HWINDOWPROC)descr->procA,
 479                                        WIN_PROC_32A, WIN_PROC_CLASS );
 480     if (descr->procW) WINPROC_SetProc( &classPtr->winprocW, (HWINDOWPROC)descr->procW,
 481                                        WIN_PROC_32W, WIN_PROC_CLASS );
 482     return atom;
 483 }
 484
 485
 486 /***********************************************************************
 487  *           CLASS_AddWindow
 488  *
 489  * Add a new window using this class, and return the necessary
 490  * information for creating the window.
 491  */
 492 CLASS *CLASS_AddWindow( ATOM atom, HINSTANCE inst, WINDOWPROCTYPE type,
 493                         INT *winExtra, WNDPROC *winproc, DWORD *style, struct tagDCE **dce )
 494 {
 495     CLASS *class;
 496     if (type == WIN_PROC_16) inst = GetExePtr(inst);
 497
 498     if (!(class = CLASS_FindClassByAtom( atom, inst ))) return NULL;
 499     class->cWindows++;
 500
 501     if (type == WIN_PROC_32W)
 502     {
 503         if (!(*winproc = class->winprocW)) *winproc = class->winprocA;
 504     }
 505     else
 506     {
 507         if (!(*winproc = class->winprocA)) *winproc = class->winprocW;
 508     }
 509     *winExtra = class->cbWndExtra;
 510     *style = class->style;
 511     *dce = class->dce;
 512     return class;
 513 }
 514
 515
 516 /***********************************************************************
 517  *           CLASS_RemoveWindow
 518  *
 519  * Remove a window from the class window count.
 520  */
 521 void CLASS_RemoveWindow( CLASS *cls )
 522 {
 523     if (cls && cls->cWindows) cls->cWindows--;
 524 }
 525
 526
 527 /***********************************************************************
 528  *              RegisterClass (USER.57)
 529  */
 530 ATOM WINAPI RegisterClass16( const WNDCLASS16 *wc )
 531 {
 532     ATOM atom;
 533     CLASS *classPtr;
 534     int iSmIconWidth, iSmIconHeight;
 535     HINSTANCE16 hInstance=GetExePtr(wc->hInstance);
 536
 537     if (!(atom = GlobalAddAtomA( MapSL(wc->lpszClassName) ))) return 0;
 538     if (!(classPtr = CLASS_RegisterClass( atom, hInstance, wc->style,
 539                                           wc->cbClsExtra, wc->cbWndExtra )))
 540     {
 541         GlobalDeleteAtom( atom );
 542         return 0;
 543     }
 544
 545     TRACE("atom=%04x wndproc=%08lx hinst=%04x "
 546                  "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) ?
 551                        (char *)MapSL(wc->lpszClassName) : "" );
 552
 553     iSmIconWidth  = GetSystemMetrics(SM_CXSMICON);
 554     iSmIconHeight = GetSystemMetrics(SM_CYSMICON);
 555
 556     classPtr->hIcon         = wc->hIcon;
 557     classPtr->hIconSm       = CopyImage(wc->hIcon, IMAGE_ICON,
 558                                         iSmIconWidth, iSmIconHeight,
 559                                         LR_COPYFROMRESOURCE);
 560     classPtr->hCursor       = wc->hCursor;
 561     classPtr->hbrBackground = wc->hbrBackground;
 562
 563     WINPROC_SetProc( &classPtr->winprocA, (HWINDOWPROC)wc->lpfnWndProc,
 564                      WIN_PROC_16, WIN_PROC_CLASS );
 565     CLASS_SetMenuNameA( classPtr, MapSL(wc->lpszMenuName) );
 566
 567     return atom;
 568 }
 569
 570
 571 /***********************************************************************
 572  *              RegisterClassA (USER32.@)
 573  * RETURNS
 574  *      >0: Unique identifier
 575  *      0: Failure
 576  */
 577 ATOM WINAPI RegisterClassA( const WNDCLASSA* wc ) /* [in] Address of structure with class data */
 578 {
 579     ATOM atom;
 580     int iSmIconWidth, iSmIconHeight;
 581     CLASS *classPtr;
 582
 583     if (!(atom = GlobalAddAtomA( wc->lpszClassName ))) return 0;
 584
 585     if (!(classPtr = CLASS_RegisterClass( atom, wc->hInstance, wc->style,
 586                                           wc->cbClsExtra, wc->cbWndExtra )))
 587     {
 588         GlobalDeleteAtom( atom );
 589         return 0;
 590     }
 591
 592     TRACE("atom=%04x wndproc=%08lx hinst=%04x bg=%04x style=%08x clsExt=%d winExt=%d class=%p name='%s'\n",
 593                    atom, (DWORD)wc->lpfnWndProc, wc->hInstance,
 594                    wc->hbrBackground, wc->style, wc->cbClsExtra,
 595                    wc->cbWndExtra, classPtr,
 596                    HIWORD(wc->lpszClassName) ? wc->lpszClassName : "" );
 597
 598     iSmIconWidth  = GetSystemMetrics(SM_CXSMICON);
 599     iSmIconHeight = GetSystemMetrics(SM_CYSMICON);
 600
 601     classPtr->hIcon         = wc->hIcon;
 602     classPtr->hIconSm       = CopyImage(wc->hIcon, IMAGE_ICON,
 603                                         iSmIconWidth, iSmIconHeight,
 604                                         LR_COPYFROMRESOURCE);
 605     classPtr->hCursor       = (HCURSOR16)wc->hCursor;
 606     classPtr->hbrBackground = (HBRUSH16)wc->hbrBackground;
 607
 608     WINPROC_SetProc( &classPtr->winprocA, (HWINDOWPROC)wc->lpfnWndProc,
 609                      WIN_PROC_32A, WIN_PROC_CLASS );
 610     CLASS_SetMenuNameA( classPtr, wc->lpszMenuName );
 611     return atom;
 612 }
 613
 614
 615 /***********************************************************************
 616  *              RegisterClassW (USER32.@)
 617  */
 618 ATOM WINAPI RegisterClassW( const WNDCLASSW* wc )
 619 {
 620     ATOM atom;
 621     int iSmIconWidth, iSmIconHeight;
 622     CLASS *classPtr;
 623
 624     if (!(atom = GlobalAddAtomW( wc->lpszClassName ))) return 0;
 625
 626     if (!(classPtr = CLASS_RegisterClass( atom, wc->hInstance, wc->style,
 627                                           wc->cbClsExtra, wc->cbWndExtra )))
 628     {
 629         GlobalDeleteAtom( atom );
 630         return 0;
 631     }
 632
 633     TRACE("atom=%04x wndproc=%08lx hinst=%04x bg=%04x style=%08x clsExt=%d winExt=%d class=%p\n",
 634                    atom, (DWORD)wc->lpfnWndProc, wc->hInstance,
 635                    wc->hbrBackground, wc->style, wc->cbClsExtra,
 636                    wc->cbWndExtra, classPtr );
 637
 638     iSmIconWidth  = GetSystemMetrics(SM_CXSMICON);
 639     iSmIconHeight = GetSystemMetrics(SM_CYSMICON);
 640
 641     classPtr->hIcon         = wc->hIcon;
 642     classPtr->hIconSm       = CopyImage(wc->hIcon, IMAGE_ICON,
 643                                         iSmIconWidth, iSmIconHeight,
 644                                         LR_COPYFROMRESOURCE);
 645     classPtr->hCursor       = (HCURSOR16)wc->hCursor;
 646     classPtr->hbrBackground = (HBRUSH16)wc->hbrBackground;
 647
 648     WINPROC_SetProc( &classPtr->winprocW, (HWINDOWPROC)wc->lpfnWndProc,
 649                      WIN_PROC_32W, WIN_PROC_CLASS );
 650     CLASS_SetMenuNameW( classPtr, wc->lpszMenuName );
 651     return atom;
 652 }
 653
 654
 655 /***********************************************************************
 656  *              RegisterClassEx (USER.397)
 657  */
 658 ATOM WINAPI RegisterClassEx16( const WNDCLASSEX16 *wc )
 659 {
 660     ATOM atom;
 661     CLASS *classPtr;
 662     HINSTANCE16 hInstance = GetExePtr( wc->hInstance );
 663
 664     if (!(atom = GlobalAddAtomA( MapSL(wc->lpszClassName) ))) return 0;
 665     if (!(classPtr = CLASS_RegisterClass( atom, hInstance, wc->style,
 666                                           wc->cbClsExtra, wc->cbWndExtra )))
 667     {
 668         GlobalDeleteAtom( atom );
 669         return 0;
 670     }
 671
 672     TRACE("atom=%04x wndproc=%08lx hinst=%04x bg=%04x style=%08x clsExt=%d winExt=%d class=%p\n",
 673                    atom, (DWORD)wc->lpfnWndProc, hInstance,
 674                    wc->hbrBackground, wc->style, wc->cbClsExtra,
 675                    wc->cbWndExtra, classPtr );
 676
 677     classPtr->hIcon         = wc->hIcon;
 678     classPtr->hIconSm       = wc->hIconSm;
 679     classPtr->hCursor       = wc->hCursor;
 680     classPtr->hbrBackground = wc->hbrBackground;
 681
 682     WINPROC_SetProc( &classPtr->winprocA, (HWINDOWPROC)wc->lpfnWndProc,
 683                      WIN_PROC_16, WIN_PROC_CLASS );
 684     CLASS_SetMenuNameA( classPtr, MapSL(wc->lpszMenuName) );
 685     return atom;
 686 }
 687
 688
 689 /***********************************************************************
 690  *              RegisterClassExA (USER32.@)
 691  */
 692 ATOM WINAPI RegisterClassExA( const WNDCLASSEXA* wc )
 693 {
 694     ATOM atom;
 695     CLASS *classPtr;
 696
 697     if (!(atom = GlobalAddAtomA( wc->lpszClassName ))) return 0;
 698
 699     if (!(classPtr = CLASS_RegisterClass( atom, wc->hInstance, wc->style,
 700                                           wc->cbClsExtra, wc->cbWndExtra )))
 701     {
 702         GlobalDeleteAtom( atom );
 703         return 0;
 704     }
 705
 706     TRACE("atom=%04x wndproc=%08lx hinst=%04x bg=%04x style=%08x clsExt=%d winExt=%d class=%p\n",
 707                    atom, (DWORD)wc->lpfnWndProc, wc->hInstance,
 708                    wc->hbrBackground, wc->style, wc->cbClsExtra,
 709                    wc->cbWndExtra, classPtr );
 710
 711     classPtr->hIcon         = (HICON16)wc->hIcon;
 712     classPtr->hIconSm       = (HICON16)wc->hIconSm;
 713     classPtr->hCursor       = (HCURSOR16)wc->hCursor;
 714     classPtr->hbrBackground = (HBRUSH16)wc->hbrBackground;
 715     WINPROC_SetProc( &classPtr->winprocA, (HWINDOWPROC)wc->lpfnWndProc,
 716                      WIN_PROC_32A, WIN_PROC_CLASS );
 717     CLASS_SetMenuNameA( classPtr, wc->lpszMenuName );
 718     return atom;
 719 }
 720
 721
 722 /***********************************************************************
 723  *              RegisterClassExW (USER32.@)
 724  */
 725 ATOM WINAPI RegisterClassExW( const WNDCLASSEXW* wc )
 726 {
 727     ATOM atom;
 728     CLASS *classPtr;
 729
 730     if (!(atom = GlobalAddAtomW( wc->lpszClassName ))) return 0;
 731
 732     if (!(classPtr = CLASS_RegisterClass( atom, wc->hInstance, wc->style,
 733                                           wc->cbClsExtra, wc->cbWndExtra )))
 734     {
 735         GlobalDeleteAtom( atom );
 736         return 0;
 737     }
 738
 739     TRACE("atom=%04x wndproc=%08lx hinst=%04x bg=%04x style=%08x clsExt=%d winExt=%d class=%p\n",
 740                    atom, (DWORD)wc->lpfnWndProc, wc->hInstance,
 741                    wc->hbrBackground, wc->style, wc->cbClsExtra,
 742                    wc->cbWndExtra, classPtr );
 743
 744     classPtr->hIcon         = (HICON16)wc->hIcon;
 745     classPtr->hIconSm       = (HICON16)wc->hIconSm;
 746     classPtr->hCursor       = (HCURSOR16)wc->hCursor;
 747     classPtr->hbrBackground = (HBRUSH16)wc->hbrBackground;
 748     WINPROC_SetProc( &classPtr->winprocW, (HWINDOWPROC)wc->lpfnWndProc,
 749                      WIN_PROC_32W, WIN_PROC_CLASS );
 750     CLASS_SetMenuNameW( classPtr, wc->lpszMenuName );
 751     return atom;
 752 }
 753
 754
 755 /***********************************************************************
 756  *              UnregisterClass (USER.403)
 757  */
 758 BOOL16 WINAPI UnregisterClass16( LPCSTR className, HINSTANCE16 hInstance )
 759 {
 760     return UnregisterClassA( className, GetExePtr( hInstance ) );
 761 }
 762
 763 /***********************************************************************
 764  *              UnregisterClassA (USER32.@)
 765  *
 766  */
 767 BOOL WINAPI UnregisterClassA( LPCSTR className, HINSTANCE hInstance )
 768 {
 769     TRACE("%s %x\n",debugstr_a(className), hInstance);
 770     return CLASS_UnregisterClass( GlobalFindAtomA( className ), hInstance );
 771 }
 772
 773 /***********************************************************************
 774  *              UnregisterClassW (USER32.@)
 775  */
 776 BOOL WINAPI UnregisterClassW( LPCWSTR className, HINSTANCE hInstance )
 777 {
 778     TRACE("%s %x\n",debugstr_w(className), hInstance);
 779     return CLASS_UnregisterClass( GlobalFindAtomW( className ), hInstance );
 780 }
 781
 782
 783 /***********************************************************************
 784  *              GetClassWord (USER32.@)
 785  */
 786 WORD WINAPI GetClassWord( HWND hwnd, INT offset )
 787 {
 788     CLASS *class;
 789     WORD retvalue = 0;
 790
 791     if (offset < 0) return GetClassLongA( hwnd, offset );
 792
 793     TRACE("%x %x\n",hwnd, offset);
 794
 795     if (!(class = get_class_ptr( hwnd, FALSE ))) return 0;
 796
 797     if (offset <= class->cbClsExtra - sizeof(WORD))
 798         memcpy( &retvalue, (char *)(class + 1) + offset, sizeof(retvalue) );
 799     else
 800         SetLastError( ERROR_INVALID_INDEX );
 801     release_class_ptr( class );
 802     return retvalue;
 803 }
 804
 805
 806 /***********************************************************************
 807  *              GetClassLong (USER.131)
 808  */
 809 LONG WINAPI GetClassLong16( HWND16 hwnd16, INT16 offset )
 810 {
 811     CLASS *class;
 812     LONG ret;
 813     HWND hwnd = (HWND)(ULONG_PTR)hwnd16;  /* no need for full handle */
 814
 815     TRACE("%x %d\n",hwnd, offset);
 816
 817     switch( offset )
 818     {
 819     case GCL_WNDPROC:
 820         if (!(class = get_class_ptr( hwnd, FALSE ))) return 0;
 821         ret = (LONG)CLASS_GetProc( class, WIN_PROC_16 );
 822         release_class_ptr( class );
 823         return ret;
 824     case GCL_MENUNAME:
 825         if (!(class = get_class_ptr( hwnd, FALSE ))) return 0;
 826         ret = (LONG)CLASS_GetMenuName16( class );
 827         release_class_ptr( class );
 828         return ret;
 829     default:
 830         return GetClassLongA( hwnd, offset );
 831     }
 832 }
 833
 834
 835 /***********************************************************************
 836  *              GetClassLongA (USER32.@)
 837  */
 838 LONG WINAPI GetClassLongA( HWND hwnd, INT offset )
 839 {
 840     CLASS *class;
 841     LONG retvalue = 0;
 842
 843     TRACE("%x %d\n", hwnd, offset);
 844
 845     if (!(class = get_class_ptr( hwnd, FALSE ))) return 0;
 846
 847     if (offset >= 0)
 848     {
 849         if (offset <= class->cbClsExtra - sizeof(LONG))
 850             memcpy( &retvalue, (char *)(class + 1) + offset, sizeof(retvalue) );
 851         else
 852             SetLastError( ERROR_INVALID_INDEX );
 853         release_class_ptr( class );
 854         return retvalue;
 855     }
 856
 857     switch(offset)
 858     {
 859     case GCL_HBRBACKGROUND:
 860         retvalue = (LONG)class->hbrBackground;
 861         break;
 862     case GCL_HCURSOR:
 863         retvalue = (LONG)class->hCursor;
 864         break;
 865     case GCL_HICON:
 866         retvalue = (LONG)class->hIcon;
 867         break;
 868     case GCL_HICONSM:
 869         retvalue = (LONG)class->hIconSm;
 870         break;
 871     case GCL_STYLE:
 872         retvalue = (LONG)class->style;
 873         break;
 874     case GCL_CBWNDEXTRA:
 875         retvalue = (LONG)class->cbWndExtra;
 876         break;
 877     case GCL_CBCLSEXTRA:
 878         retvalue = (LONG)class->cbClsExtra;
 879         break;
 880     case GCL_HMODULE:
 881         retvalue = (LONG)class->hInstance;
 882         break;
 883     case GCL_WNDPROC:
 884         retvalue = (LONG)CLASS_GetProc( class, WIN_PROC_32A );
 885         break;
 886     case GCL_MENUNAME:
 887         retvalue = (LONG)CLASS_GetMenuNameA( class );
 888         break;
 889     case GCW_ATOM:
 890         retvalue = (DWORD)class->atomName;
 891         break;
 892     default:
 893         SetLastError( ERROR_INVALID_INDEX );
 894         break;
 895     }
 896     release_class_ptr( class );
 897     return retvalue;
 898 }
 899
 900
 901 /***********************************************************************
 902  *              GetClassLongW (USER32.@)
 903  */
 904 LONG WINAPI GetClassLongW( HWND hwnd, INT offset )
 905 {
 906     CLASS *class;
 907     LONG retvalue;
 908
 909     if (offset != GCL_WNDPROC && offset != GCL_MENUNAME)
 910         return GetClassLongA( hwnd, offset );
 911
 912     TRACE("%x %d\n", hwnd, offset);
 913
 914     if (!(class = get_class_ptr( hwnd, FALSE ))) return 0;
 915
 916     if (offset == GCL_WNDPROC)
 917         retvalue = (LONG)CLASS_GetProc( class, WIN_PROC_32W );
 918     else  /* GCL_MENUNAME */
 919         retvalue = (LONG)CLASS_GetMenuNameW( class );
 920
 921     release_class_ptr( class );
 922     return retvalue;
 923 }
 924
 925
 926 /***********************************************************************
 927  *              SetClassWord (USER32.@)
 928  */
 929 WORD WINAPI SetClassWord( HWND hwnd, INT offset, WORD newval )
 930 {
 931     CLASS *class;
 932     WORD retval = 0;
 933
 934     if (offset < 0) return SetClassLongA( hwnd, offset, (DWORD)newval );
 935
 936     TRACE("%x %d %x\n", hwnd, offset, newval);
 937
 938     if (!(class = get_class_ptr( hwnd, TRUE ))) return 0;
 939
 940     if (offset <= class->cbClsExtra - sizeof(WORD))
 941     {
 942         void *ptr = (char *)(class + 1) + offset;
 943         memcpy( &retval, ptr, sizeof(retval) );
 944         memcpy( ptr, &newval, sizeof(newval) );
 945     }
 946     else SetLastError( ERROR_INVALID_INDEX );
 947
 948     release_class_ptr( class );
 949     return retval;
 950 }
 951
 952
 953 /***********************************************************************
 954  *              SetClassLong (USER.132)
 955  */
 956 LONG WINAPI SetClassLong16( HWND16 hwnd16, INT16 offset, LONG newval )
 957 {
 958     CLASS *class;
 959     LONG retval;
 960     HWND hwnd = (HWND)(ULONG_PTR)hwnd16;  /* no need for full handle */
 961
 962     TRACE("%x %d %lx\n", hwnd, offset, newval);
 963
 964     switch(offset)
 965     {
 966     case GCL_WNDPROC:
 967         if (!(class = get_class_ptr( hwnd, TRUE ))) return 0;
 968         retval = (LONG)CLASS_SetProc( class, (WNDPROC)newval, WIN_PROC_16 );
 969         release_class_ptr( class );
 970         return retval;
 971     case GCL_MENUNAME:
 972         newval = (LONG)MapSL( newval );
 973         /* fall through */
 974     default:
 975         return SetClassLongA( hwnd, offset, newval );
 976     }
 977 }
 978
 979
 980 /***********************************************************************
 981  *              SetClassLongA (USER32.@)
 982  */
 983 LONG WINAPI SetClassLongA( HWND hwnd, INT offset, LONG newval )
 984 {
 985     CLASS *class;
 986     LONG retval = 0;
 987
 988     TRACE("%x %d %lx\n", hwnd, offset, newval);
 989
 990     if (!(class = get_class_ptr( hwnd, TRUE ))) return 0;
 991
 992     if (offset >= 0)
 993     {
 994         if (offset <= class->cbClsExtra - sizeof(LONG))
 995         {
 996             void *ptr = (char *)(class + 1) + offset;
 997             memcpy( &retval, ptr, sizeof(retval) );
 998             memcpy( ptr, &newval, sizeof(newval) );
 999         }
1000         else SetLastError( ERROR_INVALID_INDEX );
1001     }
1002     else switch(offset)
1003     {
1004     case GCL_MENUNAME:
1005         CLASS_SetMenuNameA( class, (LPCSTR)newval );
1006         retval = 0;  /* Old value is now meaningless anyway */
1007         break;
1008     case GCL_WNDPROC:
1009         retval = (LONG)CLASS_SetProc( class, (WNDPROC)newval, WIN_PROC_32A );
1010         break;
1011     case GCL_HBRBACKGROUND:
1012         retval = (LONG)class->hbrBackground;
1013         class->hbrBackground = newval;
1014         break;
1015     case GCL_HCURSOR:
1016         retval = (LONG)class->hCursor;
1017         class->hCursor = newval;
1018         break;
1019     case GCL_HICON:
1020         retval = (LONG)class->hIcon;
1021         class->hIcon = newval;
1022         break;
1023     case GCL_HICONSM:
1024         retval = (LONG)class->hIconSm;
1025         class->hIconSm = newval;
1026         break;
1027     case GCL_STYLE:
1028         retval = (LONG)class->style;
1029         class->style = newval;
1030         break;
1031     case GCL_CBWNDEXTRA:
1032         retval = (LONG)class->cbWndExtra;
1033         class->cbWndExtra = newval;
1034         break;
1035     case GCL_HMODULE:
1036         retval = (LONG)class->hInstance;
1037         class->hInstance = newval;
1038         break;
1039     case GCW_ATOM:
1040         retval = (DWORD)class->atomName;
1041         class->atomName = newval;
1042         break;
1043     case GCL_CBCLSEXTRA:  /* cannot change this one */
1044         SetLastError( ERROR_INVALID_PARAMETER );
1045         break;
1046     default:
1047         SetLastError( ERROR_INVALID_INDEX );
1048         break;
1049     }
1050     release_class_ptr( class );
1051     return retval;
1052 }
1053
1054
1055 /***********************************************************************
1056  *              SetClassLongW (USER32.@)
1057  */
1058 LONG WINAPI SetClassLongW( HWND hwnd, INT offset, LONG newval )
1059 {
1060     CLASS *class;
1061     LONG retval;
1062
1063     if (offset != GCL_WNDPROC && offset != GCL_MENUNAME)
1064         return SetClassLongA( hwnd, offset, newval );
1065
1066     TRACE("%x %d %lx\n", hwnd, offset, newval);
1067
1068     if (!(class = get_class_ptr( hwnd, TRUE ))) return 0;
1069
1070     if (offset == GCL_WNDPROC)
1071         retval = (LONG)CLASS_SetProc( class, (WNDPROC)newval, WIN_PROC_32W );
1072     else  /* GCL_MENUNAME */
1073     {
1074         CLASS_SetMenuNameW( class, (LPCWSTR)newval );
1075         retval = 0;  /* Old value is now meaningless anyway */
1076     }
1077     release_class_ptr( class );
1078     return retval;
1079 }
1080
1081
1082 /***********************************************************************
1083  *              GetClassNameA (USER32.@)
1084  */
1085 INT WINAPI GetClassNameA( HWND hwnd, LPSTR buffer, INT count )
1086 {
1087     INT ret = GlobalGetAtomNameA( GetClassLongA( hwnd, GCW_ATOM ), buffer, count );
1088
1089     TRACE("%x %s %x\n",hwnd, debugstr_a(buffer), count);
1090     return ret;
1091 }
1092
1093
1094 /***********************************************************************
1095  *              GetClassNameW (USER32.@)
1096  */
1097 INT WINAPI GetClassNameW( HWND hwnd, LPWSTR buffer, INT count )
1098 {
1099     INT ret = GlobalGetAtomNameW( GetClassLongW( hwnd, GCW_ATOM ), buffer, count );
1100
1101     TRACE("%x %s %x\n",hwnd, debugstr_w(buffer), count);
1102     return ret;
1103 }
1104
1105
1106 /***********************************************************************
1107  *              GetClassInfo (USER.404)
1108  */
1109 BOOL16 WINAPI GetClassInfo16( HINSTANCE16 hInstance, SEGPTR name, WNDCLASS16 *wc )
1110 {
1111     ATOM atom;
1112     CLASS *classPtr;
1113
1114     TRACE("%x %s %p\n",hInstance, debugstr_a(MapSL(name)), wc);
1115
1116     hInstance = GetExePtr( hInstance );
1117     if (!(atom = GlobalFindAtomA( MapSL(name) )) ||
1118         !(classPtr = CLASS_FindClassByAtom( atom, hInstance )))
1119         return FALSE;
1120     if ((hInstance != classPtr->hInstance) &&
1121         !(classPtr->style & CS_GLOBALCLASS)) /*BWCC likes to pass hInstance=0*/
1122         return FALSE;
1123     wc->style         = (UINT16)classPtr->style;
1124     wc->lpfnWndProc   = CLASS_GetProc( classPtr, WIN_PROC_16 );
1125     wc->cbClsExtra    = (INT16)classPtr->cbClsExtra;
1126     wc->cbWndExtra    = (INT16)classPtr->cbWndExtra;
1127     wc->hInstance     = classPtr->style & CS_GLOBALCLASS ? GetModuleHandle16("USER") : (HINSTANCE16)classPtr->hInstance;
1128     wc->hIcon         = classPtr->hIcon;
1129     wc->hCursor       = classPtr->hCursor;
1130     wc->hbrBackground = classPtr->hbrBackground;
1131     wc->lpszClassName = name;
1132     wc->lpszMenuName  = CLASS_GetMenuName16( classPtr );
1133     return TRUE;
1134 }
1135
1136
1137 /***********************************************************************
1138  *              GetClassInfoA (USER32.@)
1139  */
1140 BOOL WINAPI GetClassInfoA( HINSTANCE hInstance, LPCSTR name,
1141                                WNDCLASSA *wc )
1142 {
1143     ATOM atom;
1144     CLASS *classPtr;
1145
1146     TRACE("%x %p %p\n",hInstance, name, wc);
1147
1148     /* workaround: if hInstance=NULL you expect to get the system classes
1149     but this classes (as example from comctl32.dll SysListView) won't be
1150     registered with hInstance=NULL in WINE because of the late loading
1151     of this dll. fixes file dialogs in WinWord95 (jsch)*/
1152
1153     if (!(atom=GlobalFindAtomA(name)) || !(classPtr=CLASS_FindClassByAtom(atom,hInstance)))
1154         return FALSE;
1155
1156     if (!(classPtr->style & CS_GLOBALCLASS) &&
1157         classPtr->hInstance &&
1158         (hInstance != classPtr->hInstance))
1159     {
1160         if (hInstance) return FALSE;
1161         WARN("systemclass %s (hInst=0) demanded but only class with hInst!=0 found\n",name);
1162     }
1163
1164     wc->style         = classPtr->style;
1165     wc->lpfnWndProc   = (WNDPROC)CLASS_GetProc( classPtr, WIN_PROC_32A );
1166     wc->cbClsExtra    = classPtr->cbClsExtra;
1167     wc->cbWndExtra    = classPtr->cbWndExtra;
1168     wc->hInstance     = hInstance;
1169     wc->hIcon         = (HICON)classPtr->hIcon;
1170     wc->hCursor       = (HCURSOR)classPtr->hCursor;
1171     wc->hbrBackground = (HBRUSH)classPtr->hbrBackground;
1172     wc->lpszMenuName  = CLASS_GetMenuNameA( classPtr );
1173     wc->lpszClassName = name;
1174     return TRUE;
1175 }
1176
1177
1178 /***********************************************************************
1179  *              GetClassInfoW (USER32.@)
1180  */
1181 BOOL WINAPI GetClassInfoW( HINSTANCE hInstance, LPCWSTR name,
1182                                WNDCLASSW *wc )
1183 {
1184     ATOM atom;
1185     CLASS *classPtr;
1186
1187     TRACE("%x %p %p\n",hInstance, name, wc);
1188
1189     if (        !(atom=GlobalFindAtomW(name)) ||
1190                 !(classPtr=CLASS_FindClassByAtom(atom,hInstance))
1191     )
1192         return FALSE;
1193
1194     if (!(classPtr->style & CS_GLOBALCLASS) &&
1195         classPtr->hInstance &&
1196         (hInstance != classPtr->hInstance))
1197     {
1198         if (hInstance) return FALSE;
1199         WARN("systemclass %s (hInst=0) demanded but only class with hInst!=0 found\n",debugstr_w(name));
1200     }
1201     wc->style         = classPtr->style;
1202     wc->lpfnWndProc   = (WNDPROC)CLASS_GetProc( classPtr, WIN_PROC_32W );
1203     wc->cbClsExtra    = classPtr->cbClsExtra;
1204     wc->cbWndExtra    = classPtr->cbWndExtra;
1205     wc->hInstance     = hInstance;
1206     wc->hIcon         = (HICON)classPtr->hIcon;
1207     wc->hCursor       = (HCURSOR)classPtr->hCursor;
1208     wc->hbrBackground = (HBRUSH)classPtr->hbrBackground;
1209     wc->lpszMenuName  = CLASS_GetMenuNameW( classPtr );
1210     wc->lpszClassName = name;
1211     return TRUE;
1212 }
1213
1214
1215 /***********************************************************************
1216  *              GetClassInfoEx (USER.398)
1217  *
1218  * FIXME: this is just a guess, I have no idea if GetClassInfoEx() is the
1219  * same in Win16 as in Win32. --AJ
1220  */
1221 BOOL16 WINAPI GetClassInfoEx16( HINSTANCE16 hInstance, SEGPTR name, WNDCLASSEX16 *wc )
1222 {
1223     ATOM atom;
1224     CLASS *classPtr;
1225
1226     TRACE("%x %s %p\n",hInstance,debugstr_a( MapSL(name) ), wc);
1227
1228     hInstance = GetExePtr( hInstance );
1229     if (!(atom = GlobalFindAtomA( MapSL(name) )) ||
1230         !(classPtr = CLASS_FindClassByAtom( atom, hInstance )) ||
1231         (hInstance != classPtr->hInstance)) return FALSE;
1232     wc->style         = classPtr->style;
1233     wc->lpfnWndProc   = CLASS_GetProc( classPtr, WIN_PROC_16 );
1234     wc->cbClsExtra    = (INT16)classPtr->cbClsExtra;
1235     wc->cbWndExtra    = (INT16)classPtr->cbWndExtra;
1236     wc->hInstance     = (HINSTANCE16)classPtr->hInstance;
1237     wc->hIcon         = classPtr->hIcon;
1238     wc->hIconSm       = classPtr->hIconSm;
1239     wc->hCursor       = classPtr->hCursor;
1240     wc->hbrBackground = classPtr->hbrBackground;
1241     wc->lpszClassName = (SEGPTR)0;
1242     wc->lpszMenuName  = CLASS_GetMenuName16( classPtr );
1243     wc->lpszClassName = name;
1244
1245     /* We must return the atom of the class here instead of just TRUE. */
1246     return atom;
1247 }
1248
1249
1250 /***********************************************************************
1251  *              GetClassInfoExA (USER32.@)
1252  */
1253 BOOL WINAPI GetClassInfoExA( HINSTANCE hInstance, LPCSTR name,
1254                                  WNDCLASSEXA *wc )
1255 {
1256     ATOM atom;
1257     CLASS *classPtr;
1258
1259     TRACE("%x %p %p\n",hInstance, name, wc);
1260
1261     if (!(atom = GlobalFindAtomA( name )) ||
1262         !(classPtr = CLASS_FindClassByAtom( atom, hInstance ))
1263         /*|| (hInstance != classPtr->hInstance) */ ) return FALSE;
1264     wc->style         = classPtr->style;
1265     wc->lpfnWndProc   = (WNDPROC)CLASS_GetProc( classPtr, WIN_PROC_32A );
1266     wc->cbClsExtra    = classPtr->cbClsExtra;
1267     wc->cbWndExtra    = classPtr->cbWndExtra;
1268     wc->hInstance     = classPtr->hInstance;
1269     wc->hIcon         = (HICON)classPtr->hIcon;
1270     wc->hIconSm       = (HICON)classPtr->hIconSm;
1271     wc->hCursor       = (HCURSOR)classPtr->hCursor;
1272     wc->hbrBackground = (HBRUSH)classPtr->hbrBackground;
1273     wc->lpszMenuName  = CLASS_GetMenuNameA( classPtr );
1274     wc->lpszClassName = name;
1275
1276     /* We must return the atom of the class here instead of just TRUE. */
1277     return atom;
1278 }
1279
1280
1281 /***********************************************************************
1282  *              GetClassInfoExW (USER32.@)
1283  */
1284 BOOL WINAPI GetClassInfoExW( HINSTANCE hInstance, LPCWSTR name,
1285                                  WNDCLASSEXW *wc )
1286 {
1287     ATOM atom;
1288     CLASS *classPtr;
1289
1290     TRACE("%x %p %p\n",hInstance, name, wc);
1291
1292     if (!(atom = GlobalFindAtomW( name )) ||
1293         !(classPtr = CLASS_FindClassByAtom( atom, hInstance )) ||
1294         (hInstance != classPtr->hInstance)) return FALSE;
1295     wc->style         = classPtr->style;
1296     wc->lpfnWndProc   = (WNDPROC)CLASS_GetProc( classPtr, WIN_PROC_32W );
1297     wc->cbClsExtra    = classPtr->cbClsExtra;
1298     wc->cbWndExtra    = classPtr->cbWndExtra;
1299     wc->hInstance     = classPtr->hInstance;
1300     wc->hIcon         = (HICON)classPtr->hIcon;
1301     wc->hIconSm       = (HICON)classPtr->hIconSm;
1302     wc->hCursor       = (HCURSOR)classPtr->hCursor;
1303     wc->hbrBackground = (HBRUSH)classPtr->hbrBackground;
1304     wc->lpszMenuName  = CLASS_GetMenuNameW( classPtr );
1305     wc->lpszClassName = name;
1306
1307     /* We must return the atom of the class here instead of just TRUE. */
1308     return atom;
1309 }
1310
1311
1312 #if 0  /* toolhelp is in kernel, so this cannot work */
1313
1314 /***********************************************************************
1315  *              ClassFirst (TOOLHELP.69)
1316  */
1317 BOOL16 WINAPI ClassFirst16( CLASSENTRY *pClassEntry )
1318 {
1319     TRACE("%p\n",pClassEntry);
1320     pClassEntry->wNext = 1;
1321     return ClassNext16( pClassEntry );
1322 }
1323
1324
1325 /***********************************************************************
1326  *              ClassNext (TOOLHELP.70)
1327  */
1328 BOOL16 WINAPI ClassNext16( CLASSENTRY *pClassEntry )
1329 {
1330     int i;
1331     CLASS *class = firstClass;
1332
1333     TRACE("%p\n",pClassEntry);
1334
1335     if (!pClassEntry->wNext) return FALSE;
1336     for (i = 1; (i < pClassEntry->wNext) && class; i++) class = class->next;
1337     if (!class)
1338     {
1339         pClassEntry->wNext = 0;
1340         return FALSE;
1341     }
1342     pClassEntry->hInst = class->hInstance;
1343     pClassEntry->wNext++;
1344     GlobalGetAtomNameA( class->atomName, pClassEntry->szClassName,
1345                           sizeof(pClassEntry->szClassName) );
1346     return TRUE;
1347 }
1348 #endif