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 <stdarg.h>
  33 #include <stdlib.h>
  34 #include <string.h>
  35
  36 #include "wine/winbase16.h"
  37 #include "winerror.h"
  38 #include "windef.h"
  39 #include "winbase.h"
  40 #include "wingdi.h"
  41 #include "wine/winuser16.h"
  42 #include "wownt32.h"
  43 #include "wine/unicode.h"
  44 #include "win.h"
  45 #include "user.h"
  46 #include "controls.h"
  47 #include "dce.h"
  48 #include "winproc.h"
  49 #include "wine/debug.h"
  50
  51 WINE_DEFAULT_DEBUG_CHANNEL(class);
  52
  53 typedef struct tagCLASS
  54 {
  55     struct tagCLASS *next;          /* Next class */
  56     struct tagCLASS *prev;          /* Prev class */
  57     UINT             cWindows;      /* Count of existing windows */
  58     UINT             style;         /* Class style */
  59     WNDPROC          winprocA;      /* Window procedure (ASCII) */
  60     WNDPROC          winprocW;      /* Window procedure (Unicode) */
  61     INT              cbClsExtra;    /* Class extra bytes */
  62     INT              cbWndExtra;    /* Window extra bytes */
  63     LPWSTR           menuName;      /* Default menu name (Unicode followed by ASCII) */
  64     SEGPTR           segMenuName;   /* Default menu name as SEGPTR */
  65     struct tagDCE   *dce;           /* Class DCE (if CS_CLASSDC) */
  66     HINSTANCE        hInstance;     /* Module that created the task */
  67     HICON            hIcon;         /* Default icon */
  68     HICON            hIconSm;       /* Default small icon */
  69     HCURSOR          hCursor;       /* Default cursor */
  70     HBRUSH           hbrBackground; /* Default background */
  71     ATOM             atomName;      /* Name of the class */
  72 } CLASS;
  73
  74 static CLASS *firstClass;
  75
  76 /***********************************************************************
  77  *           get_class_ptr
  78  */
  79 static CLASS *get_class_ptr( HWND hwnd, BOOL write_access )
  80 {
  81     WND *ptr = WIN_GetPtr( hwnd );
  82
  83     if (ptr)
  84     {
  85         if (ptr != WND_OTHER_PROCESS) return ptr->class;
  86         if (IsWindow( hwnd )) /* check other processes */
  87         {
  88             if (write_access)
  89             {
  90                 /* modifying classes in other processes is not allowed */
  91                 SetLastError( ERROR_ACCESS_DENIED );
  92                 return NULL;
  93             }
  94             FIXME( "reading from class of other process window %p\n", hwnd );
  95             /* DbgBreakPoint(); */
  96         }
  97     }
  98     SetLastError( ERROR_INVALID_WINDOW_HANDLE );
  99     return NULL;
 100 }
 101
 102
 103 /***********************************************************************
 104  *           release_class_ptr
 105  */
 106 inline static void release_class_ptr( CLASS *ptr )
 107 {
 108     USER_Unlock();
 109 }
 110
 111
 112 /***********************************************************************
 113  *           CLASS_GetProc
 114  *
 115  * Get the class winproc for a given proc type
 116  */
 117 static WNDPROC16 CLASS_GetProc( CLASS *classPtr, WINDOWPROCTYPE type )
 118 {
 119     WNDPROC proc = classPtr->winprocA;
 120
 121     if (classPtr->winprocW)
 122     {
 123         /* if we have a Unicode proc, use it if we have no ASCII proc
 124          * or if we have both and Unicode was requested
 125          */
 126         if (!proc || type == WIN_PROC_32W) proc = classPtr->winprocW;
 127     }
 128     return WINPROC_GetProc( proc, type );
 129 }
 130
 131
 132 /***********************************************************************
 133  *           CLASS_SetProc
 134  *
 135  * Set the class winproc for a given proc type.
 136  * Returns the previous window proc.
 137  */
 138 static WNDPROC16 CLASS_SetProc( CLASS *classPtr, WNDPROC newproc, WINDOWPROCTYPE type )
 139 {
 140     WNDPROC *proc = &classPtr->winprocA;
 141     WNDPROC16 ret;
 142
 143     if (classPtr->winprocW)
 144     {
 145         /* if we have a Unicode proc, use it if we have no ASCII proc
 146          * or if we have both and Unicode was requested
 147          */
 148         if (!*proc || type == WIN_PROC_32W) proc = &classPtr->winprocW;
 149     }
 150     ret = WINPROC_GetProc( *proc, type );
 151     WINPROC_SetProc( proc, newproc, type, WIN_PROC_CLASS );
 152     /* now free the one that we didn't set */
 153     if (classPtr->winprocA && classPtr->winprocW)
 154     {
 155         if (proc == &classPtr->winprocA)
 156         {
 157             WINPROC_FreeProc( classPtr->winprocW, WIN_PROC_CLASS );
 158             classPtr->winprocW = 0;
 159         }
 160         else
 161         {
 162             WINPROC_FreeProc( classPtr->winprocA, WIN_PROC_CLASS );
 163             classPtr->winprocA = 0;
 164         }
 165     }
 166     return ret;
 167 }
 168
 169
 170 /***********************************************************************
 171  *           CLASS_GetMenuNameA
 172  *
 173  * Get the menu name as a ASCII string.
 174  */
 175 inline static LPSTR CLASS_GetMenuNameA( CLASS *classPtr )
 176 {
 177     if (!HIWORD(classPtr->menuName)) return (LPSTR)classPtr->menuName;
 178     return (LPSTR)(classPtr->menuName + strlenW(classPtr->menuName) + 1);
 179 }
 180
 181
 182 /***********************************************************************
 183  *           CLASS_GetMenuName16
 184  *
 185  * Get the menu name as a SEGPTR.
 186  */
 187 inline static SEGPTR CLASS_GetMenuName16( CLASS *classPtr )
 188 {
 189     if (!HIWORD(classPtr->menuName)) return (SEGPTR)classPtr->menuName;
 190     if (!classPtr->segMenuName)
 191         classPtr->segMenuName = MapLS( CLASS_GetMenuNameA(classPtr) );
 192     return classPtr->segMenuName;
 193 }
 194
 195
 196 /***********************************************************************
 197  *           CLASS_GetMenuNameW
 198  *
 199  * Get the menu name as a Unicode string.
 200  */
 201 inline static LPWSTR CLASS_GetMenuNameW( CLASS *classPtr )
 202 {
 203     return classPtr->menuName;
 204 }
 205
 206
 207 /***********************************************************************
 208  *           CLASS_SetMenuNameA
 209  *
 210  * Set the menu name in a class structure by copying the string.
 211  */
 212 static void CLASS_SetMenuNameA( CLASS *classPtr, LPCSTR name )
 213 {
 214     UnMapLS( classPtr->segMenuName );
 215     classPtr->segMenuName = 0;
 216     if (HIWORD(classPtr->menuName)) HeapFree( GetProcessHeap(), 0, classPtr->menuName );
 217     if (HIWORD(name))
 218     {
 219         DWORD lenA = strlen(name) + 1;
 220         DWORD lenW = MultiByteToWideChar( CP_ACP, 0, name, lenA, NULL, 0 );
 221         classPtr->menuName = HeapAlloc( GetProcessHeap(), 0, lenA + lenW*sizeof(WCHAR) );
 222         MultiByteToWideChar( CP_ACP, 0, name, lenA, classPtr->menuName, lenW );
 223         memcpy( classPtr->menuName + lenW, name, lenA );
 224     }
 225     else classPtr->menuName = (LPWSTR)name;
 226 }
 227
 228
 229 /***********************************************************************
 230  *           CLASS_SetMenuNameW
 231  *
 232  * Set the menu name in a class structure by copying the string.
 233  */
 234 static void CLASS_SetMenuNameW( CLASS *classPtr, LPCWSTR name )
 235 {
 236     UnMapLS( classPtr->segMenuName );
 237     classPtr->segMenuName = 0;
 238     if (HIWORD(classPtr->menuName)) HeapFree( GetProcessHeap(), 0, classPtr->menuName );
 239     if (HIWORD(name))
 240     {
 241         DWORD lenW = strlenW(name) + 1;
 242         DWORD lenA = WideCharToMultiByte( CP_ACP, 0, name, lenW, NULL, 0, NULL, NULL );
 243         classPtr->menuName = HeapAlloc( GetProcessHeap(), 0, lenA + lenW*sizeof(WCHAR) );
 244         memcpy( classPtr->menuName, name, lenW*sizeof(WCHAR) );
 245         WideCharToMultiByte( CP_ACP, 0, name, lenW,
 246                              (char *)(classPtr->menuName + lenW), lenA, NULL, NULL );
 247     }
 248     else classPtr->menuName = (LPWSTR)name;
 249 }
 250
 251
 252 /***********************************************************************
 253  *           CLASS_FreeClass
 254  *
 255  * Free a class structure.
 256  */
 257 static BOOL CLASS_FreeClass( CLASS *classPtr )
 258 {
 259     TRACE("%p\n", classPtr);
 260
 261     /* Check if we can remove this class */
 262
 263     if (classPtr->cWindows > 0)
 264     {
 265         SetLastError( ERROR_CLASS_HAS_WINDOWS );
 266         return FALSE;
 267     }
 268
 269     /* Remove the class from the linked list */
 270
 271     if (classPtr->next) classPtr->next->prev = classPtr->prev;
 272     if (classPtr->prev) classPtr->prev->next = classPtr->next;
 273     else firstClass = classPtr->next;
 274
 275     /* Delete the class */
 276
 277     if (classPtr->dce) DCE_FreeDCE( classPtr->dce );
 278     if (classPtr->hbrBackground > (HBRUSH)(COLOR_GRADIENTINACTIVECAPTION + 1))
 279         DeleteObject( classPtr->hbrBackground );
 280     GlobalDeleteAtom( classPtr->atomName );
 281     WINPROC_FreeProc( classPtr->winprocA, WIN_PROC_CLASS );
 282     WINPROC_FreeProc( classPtr->winprocW, WIN_PROC_CLASS );
 283     UnMapLS( classPtr->segMenuName );
 284     HeapFree( GetProcessHeap(), 0, classPtr->menuName );
 285     HeapFree( GetProcessHeap(), 0, classPtr );
 286     return TRUE;
 287 }
 288
 289
 290 /***********************************************************************
 291  *           CLASS_FreeModuleClasses
 292  */
 293 void CLASS_FreeModuleClasses( HMODULE16 hModule )
 294 {
 295     CLASS *ptr, *next;
 296
 297     TRACE("0x%08x\n", hModule);
 298
 299     USER_Lock();
 300     for (ptr = firstClass; ptr; ptr = next)
 301     {
 302         next = ptr->next;
 303         if (ptr->hInstance == HINSTANCE_32(hModule)) CLASS_FreeClass( ptr );
 304     }
 305     USER_Unlock();
 306 }
 307
 308
 309 /***********************************************************************
 310  *           CLASS_FindClassByAtom
 311  *
 312  * Return a pointer to the class.
 313  * hinstance has been normalized by the caller.
 314  *
 315  * NOTES
 316  *  980805 a local class will be found now if registred with hInst=0
 317  *  and looed up with a hInst!=0. msmoney does it (jsch)
 318  *
 319  *  Local class registered with a USER instance handle are found as if
 320  *  they were global classes.
 321  */
 322 static CLASS *CLASS_FindClassByAtom( ATOM atom, HINSTANCE hinstance )
 323 {
 324     CLASS * class, *tclass = 0, *user_class = 0;
 325     HINSTANCE16 hUser = GetModuleHandle16("USER");
 326
 327     TRACE("0x%08x %p\n", atom, hinstance);
 328
 329     /* First search task-specific classes */
 330
 331     for (class = firstClass; (class); class = class->next)
 332     {
 333         if (class->style & CS_GLOBALCLASS) continue;
 334         if (class->atomName == atom)
 335         {
 336             if (hinstance==class->hInstance || hinstance == (HINSTANCE)0xffff)
 337             {
 338                 TRACE("-- found local %p\n", class);
 339                 return class;
 340             }
 341             if (class->hInstance == 0) tclass = class;
 342             else if(class->hInstance == HINSTANCE_32(hUser))
 343             {
 344                 user_class = class;
 345             }
 346         }
 347     }
 348
 349     /* Then search global classes */
 350
 351     for (class = firstClass; (class); class = class->next)
 352     {
 353         if (!(class->style & CS_GLOBALCLASS)) continue;
 354         if (class->atomName == atom)
 355         {
 356             TRACE("-- found global %p\n", class);
 357             return class;
 358         }
 359     }
 360
 361     /* Check if there was a local class registered with USER */
 362     if( user_class )
 363     {
 364         TRACE("--found local USER class %p\n", user_class);
 365         return user_class;
 366     }
 367
 368     /* Then check if there was a local class with hInst=0*/
 369     if ( tclass )
 370     {
 371         WARN("-- found local Class registred with hInst=0\n");
 372         return tclass;
 373     }
 374
 375     TRACE("-- not found\n");
 376     return 0;
 377 }
 378
 379
 380 /***********************************************************************
 381  *           CLASS_RegisterClass
 382  *
 383  * The real RegisterClass() functionality.
 384  */
 385 static CLASS *CLASS_RegisterClass( ATOM atom, HINSTANCE hInstance,
 386                                    DWORD style, INT classExtra, INT winExtra )
 387 {
 388     CLASS *classPtr;
 389
 390     TRACE("atom=0x%x hinst=%p style=0x%lx clExtr=0x%x winExtr=0x%x\n",
 391           atom, hInstance, style, classExtra, winExtra );
 392
 393    /* Check if a class with this name already exists */
 394     classPtr = CLASS_FindClassByAtom( atom, hInstance );
 395     if (classPtr)
 396     {
 397         /* Class can be created only if it is local and */
 398         /* if the class with the same name is global.   */
 399
 400         if ((style & CS_GLOBALCLASS) || !(classPtr->style & CS_GLOBALCLASS))
 401         {
 402             SetLastError( ERROR_CLASS_ALREADY_EXISTS );
 403             return NULL;
 404         }
 405     }
 406
 407     /* Fix the extra bytes value */
 408
 409     if (classExtra < 0) classExtra = 0;
 410     else if (classExtra > 40)  /* Extra bytes are limited to 40 in Win32 */
 411         WARN("Class extra bytes %d is > 40\n", classExtra);
 412     if (winExtra < 0) winExtra = 0;
 413     else if (winExtra > 40)    /* Extra bytes are limited to 40 in Win32 */
 414         WARN("Win extra bytes %d is > 40\n", winExtra );
 415
 416     /* Create the class */
 417
 418     classPtr = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(CLASS) + classExtra );
 419     if (!classPtr) return NULL;
 420     classPtr->style       = style;
 421     classPtr->cbWndExtra  = winExtra;
 422     classPtr->cbClsExtra  = classExtra;
 423     classPtr->hInstance   = hInstance;
 424     classPtr->atomName    = atom;
 425     classPtr->dce         = (style & CS_CLASSDC) ? DCE_AllocDCE( 0, DCE_CLASS_DC ) : NULL;
 426
 427     /* Other non-null values must be set by caller */
 428
 429     if ((classPtr->next = firstClass)) firstClass->prev = classPtr;
 430     firstClass = classPtr;
 431     return classPtr;
 432 }
 433
 434
 435 /***********************************************************************
 436  *           CLASS_UnregisterClass
 437  *
 438  * The real UnregisterClass() functionality.
 439  */
 440 static BOOL CLASS_UnregisterClass( ATOM atom, HINSTANCE hInstance )
 441 {
 442     CLASS *classPtr;
 443     BOOL ret = FALSE;
 444
 445     USER_Lock();
 446     if (atom &&
 447         (classPtr = CLASS_FindClassByAtom( atom, hInstance )) &&
 448         (!hInstance || classPtr->hInstance == hInstance))
 449     {
 450         ret = CLASS_FreeClass( classPtr );
 451     }
 452     else SetLastError( ERROR_CLASS_DOES_NOT_EXIST );
 453
 454     USER_Unlock();
 455     return ret;
 456 }
 457
 458
 459 /***********************************************************************
 460  *           CLASS_RegisterBuiltinClass
 461  *
 462  * Register a builtin control class.
 463  * This allows having both ASCII and Unicode winprocs for the same class.
 464  */
 465 ATOM CLASS_RegisterBuiltinClass( const struct builtin_class_descr *descr )
 466 {
 467     ATOM atom;
 468     CLASS *classPtr;
 469
 470     if (!(atom = GlobalAddAtomA( descr->name ))) return 0;
 471
 472     if (!(classPtr = CLASS_RegisterClass( atom, 0, descr->style, 0, descr->extra )))
 473     {
 474         GlobalDeleteAtom( atom );
 475         return 0;
 476     }
 477
 478     classPtr->hCursor       = LoadCursorA( 0, (LPSTR)descr->cursor );
 479     classPtr->hbrBackground = descr->brush;
 480
 481     if (descr->procA) WINPROC_SetProc( &classPtr->winprocA, descr->procA,
 482                                        WIN_PROC_32A, WIN_PROC_CLASS );
 483     if (descr->procW) WINPROC_SetProc( &classPtr->winprocW, descr->procW,
 484                                        WIN_PROC_32W, WIN_PROC_CLASS );
 485     return atom;
 486 }
 487
 488
 489 /***********************************************************************
 490  *           CLASS_AddWindow
 491  *
 492  * Add a new window using this class, and return the necessary
 493  * information for creating the window.
 494  */
 495 CLASS *CLASS_AddWindow( ATOM atom, HINSTANCE inst, WINDOWPROCTYPE type,
 496                         INT *winExtra, WNDPROC *winproc, DWORD *style, struct tagDCE **dce )
 497 {
 498     CLASS *class;
 499     if (type == WIN_PROC_16) inst = HINSTANCE_32(GetExePtr(HINSTANCE_16(inst)));
 500
 501     if (!(class = CLASS_FindClassByAtom( atom, inst ))) return NULL;
 502     class->cWindows++;
 503
 504     if (type == WIN_PROC_32W)
 505     {
 506         if (!(*winproc = class->winprocW)) *winproc = class->winprocA;
 507     }
 508     else
 509     {
 510         if (!(*winproc = class->winprocA)) *winproc = class->winprocW;
 511     }
 512     *winExtra = class->cbWndExtra;
 513     *style = class->style;
 514     *dce = class->dce;
 515     return class;
 516 }
 517
 518
 519 /***********************************************************************
 520  *           CLASS_RemoveWindow
 521  *
 522  * Remove a window from the class window count.
 523  */
 524 void CLASS_RemoveWindow( CLASS *cls )
 525 {
 526     if (cls && cls->cWindows) cls->cWindows--;
 527 }
 528
 529
 530 /***********************************************************************
 531  *              RegisterClass (USER.57)
 532  */
 533 ATOM WINAPI RegisterClass16( const WNDCLASS16 *wc )
 534 {
 535     ATOM atom;
 536     CLASS *classPtr;
 537     int iSmIconWidth, iSmIconHeight;
 538     HINSTANCE hInstance = HINSTANCE_32(GetExePtr(wc->hInstance));
 539
 540     if (!(atom = GlobalAddAtomA( MapSL(wc->lpszClassName) ))) return 0;
 541     if (!(classPtr = CLASS_RegisterClass( atom, hInstance, wc->style,
 542                                           wc->cbClsExtra, wc->cbWndExtra )))
 543     {
 544         GlobalDeleteAtom( atom );
 545         return 0;
 546     }
 547
 548     TRACE("atom=%04x wndproc=%08lx hinst=%p bg=%04x style=%08x clsExt=%d winExt=%d class=%p name='%s'\n",
 549           atom, (DWORD)wc->lpfnWndProc, hInstance,
 550           wc->hbrBackground, wc->style, wc->cbClsExtra,
 551           wc->cbWndExtra, classPtr,
 552           HIWORD(wc->lpszClassName) ? (char *)MapSL(wc->lpszClassName) : "" );
 553
 554     iSmIconWidth  = GetSystemMetrics(SM_CXSMICON);
 555     iSmIconHeight = GetSystemMetrics(SM_CYSMICON);
 556
 557     classPtr->hIcon         = HICON_32(wc->hIcon);
 558     classPtr->hIconSm       = CopyImage(classPtr->hIcon, IMAGE_ICON,
 559                                         iSmIconWidth, iSmIconHeight,
 560                                         LR_COPYFROMRESOURCE);
 561     classPtr->hCursor       = HCURSOR_32(wc->hCursor);
 562     classPtr->hbrBackground = HBRUSH_32(wc->hbrBackground);
 563
 564     WINPROC_SetProc( &classPtr->winprocA, (WNDPROC)wc->lpfnWndProc,
 565                      WIN_PROC_16, WIN_PROC_CLASS );
 566     CLASS_SetMenuNameA( classPtr, MapSL(wc->lpszMenuName) );
 567
 568     return atom;
 569 }
 570
 571
 572 /***********************************************************************
 573  *              RegisterClassA (USER32.@)
 574  * RETURNS
 575  *      >0: Unique identifier
 576  *      0: Failure
 577  */
 578 ATOM WINAPI RegisterClassA( const WNDCLASSA* wc ) /* [in] Address of structure with class data */
 579 {
 580     ATOM atom;
 581     int iSmIconWidth, iSmIconHeight;
 582     CLASS *classPtr;
 583
 584     if (!(atom = GlobalAddAtomA( wc->lpszClassName ))) return 0;
 585
 586     if (!(classPtr = CLASS_RegisterClass( atom, wc->hInstance, wc->style,
 587                                           wc->cbClsExtra, wc->cbWndExtra )))
 588     {
 589         GlobalDeleteAtom( atom );
 590         return 0;
 591     }
 592
 593     TRACE("atom=%04x wndproc=%p hinst=%p bg=%p style=%08x clsExt=%d winExt=%d class=%p name='%s'\n",
 594           atom, wc->lpfnWndProc, wc->hInstance,
 595           wc->hbrBackground, wc->style, wc->cbClsExtra,
 596           wc->cbWndExtra, classPtr,
 597           HIWORD(wc->lpszClassName) ? wc->lpszClassName : "" );
 598
 599     iSmIconWidth  = GetSystemMetrics(SM_CXSMICON);
 600     iSmIconHeight = GetSystemMetrics(SM_CYSMICON);
 601
 602     classPtr->hIcon         = wc->hIcon;
 603     classPtr->hIconSm       = CopyImage(wc->hIcon, IMAGE_ICON,
 604                                         iSmIconWidth, iSmIconHeight,
 605                                         LR_COPYFROMRESOURCE);
 606     classPtr->hCursor       = wc->hCursor;
 607     classPtr->hbrBackground = wc->hbrBackground;
 608
 609     WINPROC_SetProc( &classPtr->winprocA, wc->lpfnWndProc,
 610                      WIN_PROC_32A, WIN_PROC_CLASS );
 611     CLASS_SetMenuNameA( classPtr, wc->lpszMenuName );
 612     return atom;
 613 }
 614
 615
 616 /***********************************************************************
 617  *              RegisterClassW (USER32.@)
 618  */
 619 ATOM WINAPI RegisterClassW( const WNDCLASSW* wc )
 620 {
 621     ATOM atom;
 622     int iSmIconWidth, iSmIconHeight;
 623     CLASS *classPtr;
 624
 625     if (!(atom = GlobalAddAtomW( wc->lpszClassName ))) return 0;
 626
 627     if (!(classPtr = CLASS_RegisterClass( atom, wc->hInstance, wc->style,
 628                                           wc->cbClsExtra, wc->cbWndExtra )))
 629     {
 630         GlobalDeleteAtom( atom );
 631         return 0;
 632     }
 633
 634     TRACE("atom=%04x wndproc=%p hinst=%p bg=%p style=%08x clsExt=%d winExt=%d class=%p\n",
 635           atom, wc->lpfnWndProc, wc->hInstance,
 636           wc->hbrBackground, wc->style, wc->cbClsExtra,
 637           wc->cbWndExtra, classPtr );
 638
 639     iSmIconWidth  = GetSystemMetrics(SM_CXSMICON);
 640     iSmIconHeight = GetSystemMetrics(SM_CYSMICON);
 641
 642     classPtr->hIcon         = wc->hIcon;
 643     classPtr->hIconSm       = CopyImage(wc->hIcon, IMAGE_ICON,
 644                                         iSmIconWidth, iSmIconHeight,
 645                                         LR_COPYFROMRESOURCE);
 646     classPtr->hCursor       = wc->hCursor;
 647     classPtr->hbrBackground = wc->hbrBackground;
 648
 649     WINPROC_SetProc( &classPtr->winprocW, wc->lpfnWndProc,
 650                      WIN_PROC_32W, WIN_PROC_CLASS );
 651     CLASS_SetMenuNameW( classPtr, wc->lpszMenuName );
 652     return atom;
 653 }
 654
 655
 656 /***********************************************************************
 657  *              RegisterClassEx (USER.397)
 658  */
 659 ATOM WINAPI RegisterClassEx16( const WNDCLASSEX16 *wc )
 660 {
 661     ATOM atom;
 662     CLASS *classPtr;
 663     HINSTANCE hInstance = HINSTANCE_32(GetExePtr( wc->hInstance ));
 664
 665     if (!(atom = GlobalAddAtomA( MapSL(wc->lpszClassName) ))) return 0;
 666     if (!(classPtr = CLASS_RegisterClass( atom, hInstance, wc->style,
 667                                           wc->cbClsExtra, wc->cbWndExtra )))
 668     {
 669         GlobalDeleteAtom( atom );
 670         return 0;
 671     }
 672
 673     TRACE("atom=%04x wndproc=%p hinst=%p bg=%04x style=%08x clsExt=%d winExt=%d class=%p\n",
 674           atom, wc->lpfnWndProc, hInstance,
 675           wc->hbrBackground, wc->style, wc->cbClsExtra,
 676           wc->cbWndExtra, classPtr );
 677
 678     classPtr->hIcon         = HICON_32(wc->hIcon);
 679     classPtr->hIconSm       = HICON_32(wc->hIconSm);
 680     classPtr->hCursor       = HCURSOR_32(wc->hCursor);
 681     classPtr->hbrBackground = HBRUSH_32(wc->hbrBackground);
 682
 683     WINPROC_SetProc( &classPtr->winprocA, (WNDPROC)wc->lpfnWndProc,
 684                      WIN_PROC_16, WIN_PROC_CLASS );
 685     CLASS_SetMenuNameA( classPtr, MapSL(wc->lpszMenuName) );
 686     return atom;
 687 }
 688
 689
 690 /***********************************************************************
 691  *              RegisterClassExA (USER32.@)
 692  */
 693 ATOM WINAPI RegisterClassExA( const WNDCLASSEXA* wc )
 694 {
 695     ATOM atom;
 696     CLASS *classPtr;
 697
 698     if (!(atom = GlobalAddAtomA( wc->lpszClassName ))) return 0;
 699
 700     if (!(classPtr = CLASS_RegisterClass( atom, wc->hInstance, wc->style,
 701                                           wc->cbClsExtra, wc->cbWndExtra )))
 702     {
 703         GlobalDeleteAtom( atom );
 704         return 0;
 705     }
 706
 707     TRACE("atom=%04x wndproc=%p hinst=%p bg=%p style=%08x clsExt=%d winExt=%d class=%p\n",
 708           atom, wc->lpfnWndProc, wc->hInstance,
 709           wc->hbrBackground, wc->style, wc->cbClsExtra,
 710           wc->cbWndExtra, classPtr );
 711
 712     classPtr->hIcon         = wc->hIcon;
 713     classPtr->hIconSm       = wc->hIconSm;
 714     classPtr->hCursor       = wc->hCursor;
 715     classPtr->hbrBackground = wc->hbrBackground;
 716     WINPROC_SetProc( &classPtr->winprocA, wc->lpfnWndProc, 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=%p hinst=%p bg=%p style=%08x clsExt=%d winExt=%d class=%p\n",
 740           atom, wc->lpfnWndProc, wc->hInstance,
 741           wc->hbrBackground, wc->style, wc->cbClsExtra,
 742           wc->cbWndExtra, classPtr );
 743
 744     classPtr->hIcon         = wc->hIcon;
 745     classPtr->hIconSm       = wc->hIconSm;
 746     classPtr->hCursor       = wc->hCursor;
 747     classPtr->hbrBackground = wc->hbrBackground;
 748     WINPROC_SetProc( &classPtr->winprocW, wc->lpfnWndProc, WIN_PROC_32W, WIN_PROC_CLASS );
 749     CLASS_SetMenuNameW( classPtr, wc->lpszMenuName );
 750     return atom;
 751 }
 752
 753
 754 /***********************************************************************
 755  *              UnregisterClass (USER.403)
 756  */
 757 BOOL16 WINAPI UnregisterClass16( LPCSTR className, HINSTANCE16 hInstance )
 758 {
 759     return UnregisterClassA( className, HINSTANCE_32(GetExePtr( hInstance )) );
 760 }
 761
 762 /***********************************************************************
 763  *              UnregisterClassA (USER32.@)
 764  *
 765  */
 766 BOOL WINAPI UnregisterClassA( LPCSTR className, HINSTANCE hInstance )
 767 {
 768     TRACE("%s %p\n",debugstr_a(className), hInstance);
 769     return CLASS_UnregisterClass( GlobalFindAtomA( className ), hInstance );
 770 }
 771
 772 /***********************************************************************
 773  *              UnregisterClassW (USER32.@)
 774  */
 775 BOOL WINAPI UnregisterClassW( LPCWSTR className, HINSTANCE hInstance )
 776 {
 777     TRACE("%s %p\n",debugstr_w(className), hInstance);
 778     return CLASS_UnregisterClass( GlobalFindAtomW( className ), hInstance );
 779 }
 780
 781
 782 /***********************************************************************
 783  *              GetClassWord (USER32.@)
 784  */
 785 WORD WINAPI GetClassWord( HWND hwnd, INT offset )
 786 {
 787     CLASS *class;
 788     WORD retvalue = 0;
 789
 790     if (offset < 0) return GetClassLongA( hwnd, offset );
 791
 792     TRACE("%p %x\n",hwnd, offset);
 793
 794     if (!(class = get_class_ptr( hwnd, FALSE ))) return 0;
 795
 796     if (offset <= class->cbClsExtra - sizeof(WORD))
 797         memcpy( &retvalue, (char *)(class + 1) + offset, sizeof(retvalue) );
 798     else
 799         SetLastError( ERROR_INVALID_INDEX );
 800     release_class_ptr( class );
 801     return retvalue;
 802 }
 803
 804
 805 /***********************************************************************
 806  *              GetClassLong (USER.131)
 807  */
 808 LONG WINAPI GetClassLong16( HWND16 hwnd16, INT16 offset )
 809 {
 810     CLASS *class;
 811     LONG ret;
 812     HWND hwnd = (HWND)(ULONG_PTR)hwnd16;  /* no need for full handle */
 813
 814     TRACE("%p %d\n",hwnd, offset);
 815
 816     switch( offset )
 817     {
 818     case GCL_WNDPROC:
 819         if (!(class = get_class_ptr( hwnd, FALSE ))) return 0;
 820         ret = (LONG)CLASS_GetProc( class, WIN_PROC_16 );
 821         release_class_ptr( class );
 822         return ret;
 823     case GCL_MENUNAME:
 824         if (!(class = get_class_ptr( hwnd, FALSE ))) return 0;
 825         ret = (LONG)CLASS_GetMenuName16( class );
 826         release_class_ptr( class );
 827         return ret;
 828     default:
 829         return GetClassLongA( hwnd, offset );
 830     }
 831 }
 832
 833
 834 /***********************************************************************
 835  *              GetClassLongW (USER32.@)
 836  */
 837 LONG WINAPI GetClassLongW( HWND hwnd, INT offset )
 838 {
 839     CLASS *class;
 840     LONG retvalue = 0;
 841
 842     TRACE("%p %d\n", hwnd, offset);
 843
 844     if (!(class = get_class_ptr( hwnd, FALSE ))) return 0;
 845
 846     if (offset >= 0)
 847     {
 848         if (offset <= class->cbClsExtra - sizeof(LONG))
 849             memcpy( &retvalue, (char *)(class + 1) + offset, sizeof(retvalue) );
 850         else
 851             SetLastError( ERROR_INVALID_INDEX );
 852         release_class_ptr( class );
 853         return retvalue;
 854     }
 855
 856     switch(offset)
 857     {
 858     case GCL_HBRBACKGROUND:
 859         retvalue = (LONG)class->hbrBackground;
 860         break;
 861     case GCL_HCURSOR:
 862         retvalue = (LONG)class->hCursor;
 863         break;
 864     case GCL_HICON:
 865         retvalue = (LONG)class->hIcon;
 866         break;
 867     case GCL_HICONSM:
 868         retvalue = (LONG)class->hIconSm;
 869         break;
 870     case GCL_STYLE:
 871         retvalue = (LONG)class->style;
 872         break;
 873     case GCL_CBWNDEXTRA:
 874         retvalue = (LONG)class->cbWndExtra;
 875         break;
 876     case GCL_CBCLSEXTRA:
 877         retvalue = (LONG)class->cbClsExtra;
 878         break;
 879     case GCL_HMODULE:
 880         retvalue = (LONG)class->hInstance;
 881         break;
 882     case GCL_WNDPROC:
 883         retvalue = (LONG)CLASS_GetProc( class, WIN_PROC_32W );
 884         break;
 885     case GCL_MENUNAME:
 886         retvalue = (LONG)CLASS_GetMenuNameW( class );
 887         break;
 888     case GCW_ATOM:
 889         retvalue = (DWORD)class->atomName;
 890         break;
 891     default:
 892         SetLastError( ERROR_INVALID_INDEX );
 893         break;
 894     }
 895     release_class_ptr( class );
 896     return retvalue;
 897 }
 898
 899
 900 /***********************************************************************
 901  *              GetClassLongA (USER32.@)
 902  */
 903 LONG WINAPI GetClassLongA( HWND hwnd, INT offset )
 904 {
 905     CLASS *class;
 906     LONG retvalue;
 907
 908     if (offset != GCL_WNDPROC && offset != GCL_MENUNAME)
 909         return GetClassLongW( hwnd, offset );
 910
 911     TRACE("%p %d\n", hwnd, offset);
 912
 913     if (!(class = get_class_ptr( hwnd, FALSE ))) return 0;
 914
 915     if (offset == GCL_WNDPROC)
 916         retvalue = (LONG)CLASS_GetProc( class, WIN_PROC_32A );
 917     else  /* GCL_MENUNAME */
 918         retvalue = (LONG)CLASS_GetMenuNameA( class );
 919
 920     release_class_ptr( class );
 921     return retvalue;
 922 }
 923
 924
 925 /***********************************************************************
 926  *              SetClassWord (USER32.@)
 927  */
 928 WORD WINAPI SetClassWord( HWND hwnd, INT offset, WORD newval )
 929 {
 930     CLASS *class;
 931     WORD retval = 0;
 932
 933     if (offset < 0) return SetClassLongA( hwnd, offset, (DWORD)newval );
 934
 935     TRACE("%p %d %x\n", hwnd, offset, newval);
 936
 937     if (!(class = get_class_ptr( hwnd, TRUE ))) return 0;
 938
 939     if (offset <= class->cbClsExtra - sizeof(WORD))
 940     {
 941         void *ptr = (char *)(class + 1) + offset;
 942         memcpy( &retval, ptr, sizeof(retval) );
 943         memcpy( ptr, &newval, sizeof(newval) );
 944     }
 945     else SetLastError( ERROR_INVALID_INDEX );
 946
 947     release_class_ptr( class );
 948     return retval;
 949 }
 950
 951
 952 /***********************************************************************
 953  *              SetClassLong (USER.132)
 954  */
 955 LONG WINAPI SetClassLong16( HWND16 hwnd16, INT16 offset, LONG newval )
 956 {
 957     CLASS *class;
 958     LONG retval;
 959     HWND hwnd = (HWND)(ULONG_PTR)hwnd16;  /* no need for full handle */
 960
 961     TRACE("%p %d %lx\n", hwnd, offset, newval);
 962
 963     switch(offset)
 964     {
 965     case GCL_WNDPROC:
 966         if (!(class = get_class_ptr( hwnd, TRUE ))) return 0;
 967         retval = (LONG)CLASS_SetProc( class, (WNDPROC)newval, WIN_PROC_16 );
 968         release_class_ptr( class );
 969         return retval;
 970     case GCL_MENUNAME:
 971         newval = (LONG)MapSL( newval );
 972         /* fall through */
 973     default:
 974         return SetClassLongA( hwnd, offset, newval );
 975     }
 976 }
 977
 978
 979 /***********************************************************************
 980  *              SetClassLongW (USER32.@)
 981  */
 982 LONG WINAPI SetClassLongW( HWND hwnd, INT offset, LONG newval )
 983 {
 984     CLASS *class;
 985     LONG retval = 0;
 986
 987     TRACE("%p %d %lx\n", hwnd, offset, newval);
 988
 989     if (!(class = get_class_ptr( hwnd, TRUE ))) return 0;
 990
 991     if (offset >= 0)
 992     {
 993         if (offset <= class->cbClsExtra - sizeof(LONG))
 994         {
 995             void *ptr = (char *)(class + 1) + offset;
 996             memcpy( &retval, ptr, sizeof(retval) );
 997             memcpy( ptr, &newval, sizeof(newval) );
 998         }
 999         else SetLastError( ERROR_INVALID_INDEX );
1000     }
1001     else switch(offset)
1002     {
1003     case GCL_MENUNAME:
1004         CLASS_SetMenuNameW( class, (LPCWSTR)newval );
1005         retval = 0;  /* Old value is now meaningless anyway */
1006         break;
1007     case GCL_WNDPROC:
1008         retval = (LONG)CLASS_SetProc( class, (WNDPROC)newval, WIN_PROC_32W );
1009         break;
1010     case GCL_HBRBACKGROUND:
1011         retval = (LONG)class->hbrBackground;
1012         class->hbrBackground = (HBRUSH)newval;
1013         break;
1014     case GCL_HCURSOR:
1015         retval = (LONG)class->hCursor;
1016         class->hCursor = (HCURSOR)newval;
1017         break;
1018     case GCL_HICON:
1019         retval = (LONG)class->hIcon;
1020         class->hIcon = (HICON)newval;
1021         break;
1022     case GCL_HICONSM:
1023         retval = (LONG)class->hIconSm;
1024         class->hIconSm = (HICON)newval;
1025         break;
1026     case GCL_STYLE:
1027         retval = (LONG)class->style;
1028         class->style = newval;
1029         break;
1030     case GCL_CBWNDEXTRA:
1031         retval = (LONG)class->cbWndExtra;
1032         class->cbWndExtra = newval;
1033         break;
1034     case GCL_HMODULE:
1035         retval = (LONG)class->hInstance;
1036         class->hInstance = (HINSTANCE)newval;
1037         break;
1038     case GCW_ATOM:
1039         retval = (DWORD)class->atomName;
1040         class->atomName = newval;
1041         break;
1042     case GCL_CBCLSEXTRA:  /* cannot change this one */
1043         SetLastError( ERROR_INVALID_PARAMETER );
1044         break;
1045     default:
1046         SetLastError( ERROR_INVALID_INDEX );
1047         break;
1048     }
1049     release_class_ptr( class );
1050     return retval;
1051 }
1052
1053
1054 /***********************************************************************
1055  *              SetClassLongA (USER32.@)
1056  */
1057 LONG WINAPI SetClassLongA( HWND hwnd, INT offset, LONG newval )
1058 {
1059     CLASS *class;
1060     LONG retval;
1061
1062     if (offset != GCL_WNDPROC && offset != GCL_MENUNAME)
1063         return SetClassLongW( hwnd, offset, newval );
1064
1065     TRACE("%p %d %lx\n", hwnd, offset, newval);
1066
1067     if (!(class = get_class_ptr( hwnd, TRUE ))) return 0;
1068
1069     if (offset == GCL_WNDPROC)
1070         retval = (LONG)CLASS_SetProc( class, (WNDPROC)newval, WIN_PROC_32A );
1071     else  /* GCL_MENUNAME */
1072     {
1073         CLASS_SetMenuNameA( class, (LPCSTR)newval );
1074         retval = 0;  /* Old value is now meaningless anyway */
1075     }
1076     release_class_ptr( class );
1077     return retval;
1078 }
1079
1080
1081 /***********************************************************************
1082  *              GetClassNameA (USER32.@)
1083  */
1084 INT WINAPI GetClassNameA( HWND hwnd, LPSTR buffer, INT count )
1085 {
1086     INT ret = GlobalGetAtomNameA( GetClassLongA( hwnd, GCW_ATOM ), buffer, count );
1087
1088     TRACE("%p %s %x\n",hwnd, debugstr_a(buffer), count);
1089     return ret;
1090 }
1091
1092
1093 /***********************************************************************
1094  *              GetClassNameW (USER32.@)
1095  */
1096 INT WINAPI GetClassNameW( HWND hwnd, LPWSTR buffer, INT count )
1097 {
1098     INT ret = GlobalGetAtomNameW( GetClassLongW( hwnd, GCW_ATOM ), buffer, count );
1099
1100     TRACE("%p %s %x\n",hwnd, debugstr_w(buffer), count);
1101     return ret;
1102 }
1103
1104
1105 /***********************************************************************
1106  *              RealGetWindowClassA (USER32.@)
1107  */
1108 UINT WINAPI RealGetWindowClassA( HWND hwnd, LPSTR buffer, UINT count )
1109 {
1110     return GetClassNameA( hwnd, buffer, count );
1111 }
1112
1113
1114 /***********************************************************************
1115  *              RealGetWindowClassW (USER32.@)
1116  */
1117 UINT WINAPI RealGetWindowClassW( HWND hwnd, LPWSTR buffer, UINT count )
1118 {
1119     return GetClassNameW( hwnd, buffer, count );
1120 }
1121
1122
1123 /***********************************************************************
1124  *              GetClassInfo (USER.404)
1125  */
1126 BOOL16 WINAPI GetClassInfo16( HINSTANCE16 hInst16, SEGPTR name, WNDCLASS16 *wc )
1127 {
1128     ATOM atom;
1129     CLASS *classPtr;
1130     HINSTANCE hInstance = HINSTANCE_32(GetExePtr( hInst16 ));
1131
1132     TRACE("%p %s %p\n",hInstance, debugstr_a(MapSL(name)), wc);
1133
1134     if (!(atom = GlobalFindAtomA( MapSL(name) )) ||
1135         !(classPtr = CLASS_FindClassByAtom( atom, hInstance )))
1136         return FALSE;
1137     if ((hInstance != classPtr->hInstance) &&
1138         !(classPtr->style & CS_GLOBALCLASS)) /*BWCC likes to pass hInstance=0*/
1139         return FALSE;
1140     wc->style         = (UINT16)classPtr->style;
1141     wc->lpfnWndProc   = CLASS_GetProc( classPtr, WIN_PROC_16 );
1142     wc->cbClsExtra    = (INT16)classPtr->cbClsExtra;
1143     wc->cbWndExtra    = (INT16)classPtr->cbWndExtra;
1144     wc->hInstance     = classPtr->style & CS_GLOBALCLASS ? GetModuleHandle16("USER") : HINSTANCE_16(classPtr->hInstance);
1145     wc->hIcon         = HICON_16(classPtr->hIcon);
1146     wc->hCursor       = HCURSOR_16(classPtr->hCursor);
1147     wc->hbrBackground = HBRUSH_16(classPtr->hbrBackground);
1148     wc->lpszClassName = name;
1149     wc->lpszMenuName  = CLASS_GetMenuName16( classPtr );
1150
1151     /* We must return the atom of the class here instead of just TRUE. */
1152     return atom;
1153 }
1154
1155
1156 /***********************************************************************
1157  *              GetClassInfoA (USER32.@)
1158  */
1159 BOOL WINAPI GetClassInfoA( HINSTANCE hInstance, LPCSTR name,
1160                                WNDCLASSA *wc )
1161 {
1162     ATOM atom;
1163     CLASS *classPtr;
1164
1165     TRACE("%p %p %p\n",hInstance, name, wc);
1166
1167     /* workaround: if hInstance=NULL you expect to get the system classes
1168     but this classes (as example from comctl32.dll SysListView) won't be
1169     registered with hInstance=NULL in WINE because of the late loading
1170     of this dll. fixes file dialogs in WinWord95 (jsch)*/
1171
1172     if (!(atom=GlobalFindAtomA(name)) || !(classPtr=CLASS_FindClassByAtom(atom,hInstance)))
1173         return FALSE;
1174
1175     if (!(classPtr->style & CS_GLOBALCLASS) &&
1176         classPtr->hInstance &&
1177         (hInstance != classPtr->hInstance))
1178     {
1179         if (hInstance) return FALSE;
1180         WARN("systemclass %s (hInst=0) demanded but only class with hInst!=0 found\n",name);
1181     }
1182
1183     wc->style         = classPtr->style;
1184     wc->lpfnWndProc   = (WNDPROC)CLASS_GetProc( classPtr, WIN_PROC_32A );
1185     wc->cbClsExtra    = classPtr->cbClsExtra;
1186     wc->cbWndExtra    = classPtr->cbWndExtra;
1187     wc->hInstance     = hInstance;
1188     wc->hIcon         = (HICON)classPtr->hIcon;
1189     wc->hCursor       = (HCURSOR)classPtr->hCursor;
1190     wc->hbrBackground = (HBRUSH)classPtr->hbrBackground;
1191     wc->lpszMenuName  = CLASS_GetMenuNameA( classPtr );
1192     wc->lpszClassName = name;
1193
1194     /* We must return the atom of the class here instead of just TRUE. */
1195     return atom;
1196 }
1197
1198
1199 /***********************************************************************
1200  *              GetClassInfoW (USER32.@)
1201  */
1202 BOOL WINAPI GetClassInfoW( HINSTANCE hInstance, LPCWSTR name,
1203                                WNDCLASSW *wc )
1204 {
1205     ATOM atom;
1206     CLASS *classPtr;
1207
1208     TRACE("%p %p %p\n",hInstance, name, wc);
1209
1210     if (        !(atom=GlobalFindAtomW(name)) ||
1211                 !(classPtr=CLASS_FindClassByAtom(atom,hInstance))
1212     )
1213         return FALSE;
1214
1215     if (!(classPtr->style & CS_GLOBALCLASS) &&
1216         classPtr->hInstance &&
1217         (hInstance != classPtr->hInstance))
1218     {
1219         if (hInstance) return FALSE;
1220         WARN("systemclass %s (hInst=0) demanded but only class with hInst!=0 found\n",debugstr_w(name));
1221     }
1222     wc->style         = classPtr->style;
1223     wc->lpfnWndProc   = (WNDPROC)CLASS_GetProc( classPtr, WIN_PROC_32W );
1224     wc->cbClsExtra    = classPtr->cbClsExtra;
1225     wc->cbWndExtra    = classPtr->cbWndExtra;
1226     wc->hInstance     = hInstance;
1227     wc->hIcon         = (HICON)classPtr->hIcon;
1228     wc->hCursor       = (HCURSOR)classPtr->hCursor;
1229     wc->hbrBackground = (HBRUSH)classPtr->hbrBackground;
1230     wc->lpszMenuName  = CLASS_GetMenuNameW( classPtr );
1231     wc->lpszClassName = name;
1232
1233     /* We must return the atom of the class here instead of just TRUE. */
1234     return atom;
1235 }
1236
1237
1238 /***********************************************************************
1239  *              GetClassInfoEx (USER.398)
1240  *
1241  * FIXME: this is just a guess, I have no idea if GetClassInfoEx() is the
1242  * same in Win16 as in Win32. --AJ
1243  */
1244 BOOL16 WINAPI GetClassInfoEx16( HINSTANCE16 hInst16, SEGPTR name, WNDCLASSEX16 *wc )
1245 {
1246     ATOM atom;
1247     CLASS *classPtr;
1248     HINSTANCE hInstance = HINSTANCE_32(GetExePtr( hInst16 ));
1249
1250     TRACE("%p %s %p\n",hInstance,debugstr_a( MapSL(name) ), wc);
1251
1252     if (!(atom = GlobalFindAtomA( MapSL(name) )) ||
1253         !(classPtr = CLASS_FindClassByAtom( atom, hInstance )) ||
1254         (hInstance != classPtr->hInstance)) return FALSE;
1255     wc->style         = classPtr->style;
1256     wc->lpfnWndProc   = CLASS_GetProc( classPtr, WIN_PROC_16 );
1257     wc->cbClsExtra    = (INT16)classPtr->cbClsExtra;
1258     wc->cbWndExtra    = (INT16)classPtr->cbWndExtra;
1259     wc->hInstance     = HINSTANCE_16(classPtr->hInstance);
1260     wc->hIcon         = HICON_16(classPtr->hIcon);
1261     wc->hIconSm       = HICON_16(classPtr->hIconSm);
1262     wc->hCursor       = HCURSOR_16(classPtr->hCursor);
1263     wc->hbrBackground = HBRUSH_16(classPtr->hbrBackground);
1264     wc->lpszClassName = (SEGPTR)0;
1265     wc->lpszMenuName  = CLASS_GetMenuName16( classPtr );
1266     wc->lpszClassName = name;
1267
1268     /* We must return the atom of the class here instead of just TRUE. */
1269     return atom;
1270 }
1271
1272
1273 /***********************************************************************
1274  *              GetClassInfoExA (USER32.@)
1275  */
1276 BOOL WINAPI GetClassInfoExA( HINSTANCE hInstance, LPCSTR name,
1277                                  WNDCLASSEXA *wc )
1278 {
1279     ATOM atom;
1280     CLASS *classPtr;
1281
1282     TRACE("%p %p %p\n",hInstance, name, wc);
1283
1284     if (!(atom = GlobalFindAtomA( name )) ||
1285         !(classPtr = CLASS_FindClassByAtom( atom, hInstance ))
1286         /*|| (hInstance != classPtr->hInstance) */ ) return FALSE;
1287     wc->style         = classPtr->style;
1288     wc->lpfnWndProc   = (WNDPROC)CLASS_GetProc( classPtr, WIN_PROC_32A );
1289     wc->cbClsExtra    = classPtr->cbClsExtra;
1290     wc->cbWndExtra    = classPtr->cbWndExtra;
1291     wc->hInstance     = classPtr->hInstance;
1292     wc->hIcon         = (HICON)classPtr->hIcon;
1293     wc->hIconSm       = (HICON)classPtr->hIconSm;
1294     wc->hCursor       = (HCURSOR)classPtr->hCursor;
1295     wc->hbrBackground = (HBRUSH)classPtr->hbrBackground;
1296     wc->lpszMenuName  = CLASS_GetMenuNameA( classPtr );
1297     wc->lpszClassName = name;
1298
1299     /* We must return the atom of the class here instead of just TRUE. */
1300     return atom;
1301 }
1302
1303
1304 /***********************************************************************
1305  *              GetClassInfoExW (USER32.@)
1306  */
1307 BOOL WINAPI GetClassInfoExW( HINSTANCE hInstance, LPCWSTR name,
1308                                  WNDCLASSEXW *wc )
1309 {
1310     ATOM atom;
1311     CLASS *classPtr;
1312
1313     TRACE("%p %p %p\n",hInstance, name, wc);
1314
1315     if (!(atom = GlobalFindAtomW( name )) ||
1316         !(classPtr = CLASS_FindClassByAtom( atom, hInstance )) ||
1317         (hInstance != classPtr->hInstance)) return FALSE;
1318     wc->style         = classPtr->style;
1319     wc->lpfnWndProc   = (WNDPROC)CLASS_GetProc( classPtr, WIN_PROC_32W );
1320     wc->cbClsExtra    = classPtr->cbClsExtra;
1321     wc->cbWndExtra    = classPtr->cbWndExtra;
1322     wc->hInstance     = classPtr->hInstance;
1323     wc->hIcon         = (HICON)classPtr->hIcon;
1324     wc->hIconSm       = (HICON)classPtr->hIconSm;
1325     wc->hCursor       = (HCURSOR)classPtr->hCursor;
1326     wc->hbrBackground = (HBRUSH)classPtr->hbrBackground;
1327     wc->lpszMenuName  = CLASS_GetMenuNameW( classPtr );
1328     wc->lpszClassName = name;
1329
1330     /* We must return the atom of the class here instead of just TRUE. */
1331     return atom;
1332 }
1333
1334
1335 #if 0  /* toolhelp is in kernel, so this cannot work */
1336
1337 /***********************************************************************
1338  *              ClassFirst (TOOLHELP.69)
1339  */
1340 BOOL16 WINAPI ClassFirst16( CLASSENTRY *pClassEntry )
1341 {
1342     TRACE("%p\n",pClassEntry);
1343     pClassEntry->wNext = 1;
1344     return ClassNext16( pClassEntry );
1345 }
1346
1347
1348 /***********************************************************************
1349  *              ClassNext (TOOLHELP.70)
1350  */
1351 BOOL16 WINAPI ClassNext16( CLASSENTRY *pClassEntry )
1352 {
1353     int i;
1354     CLASS *class = firstClass;
1355
1356     TRACE("%p\n",pClassEntry);
1357
1358     if (!pClassEntry->wNext) return FALSE;
1359     for (i = 1; (i < pClassEntry->wNext) && class; i++) class = class->next;
1360     if (!class)
1361     {
1362         pClassEntry->wNext = 0;
1363         return FALSE;
1364     }
1365     pClassEntry->hInst = class->hInstance;
1366     pClassEntry->wNext++;
1367     GlobalGetAtomNameA( class->atomName, pClassEntry->szClassName,
1368                           sizeof(pClassEntry->szClassName) );
1369     return TRUE;
1370 }
1371 #endif