subsystems/win32/win32k/ntuser/focus.c

   1 /*
   2  * ReactOS Win32 Subsystem
   3  * Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003 ReactOS Team
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  */
  20
  21 #include <win32k.h>
  22
  23 #define NDEBUG
  24 #include <debug.h>
  25
  26 HWND FASTCALL
  27 IntGetCaptureWindow(VOID)
  28 {
  29    PUSER_MESSAGE_QUEUE ForegroundQueue = IntGetFocusMessageQueue();
  30    return ForegroundQueue != NULL ? ForegroundQueue->CaptureWindow : 0;
  31 }
  32
  33 HWND FASTCALL
  34 IntGetFocusWindow(VOID)
  35 {
  36    PUSER_MESSAGE_QUEUE ForegroundQueue = IntGetFocusMessageQueue();
  37    return ForegroundQueue != NULL ? ForegroundQueue->FocusWindow : 0;
  38 }
  39
  40 HWND FASTCALL
  41 IntGetThreadFocusWindow(VOID)
  42 {
  43    PTHREADINFO pti;
  44    PUSER_MESSAGE_QUEUE ThreadQueue;
  45
  46    pti = PsGetCurrentThreadWin32Thread();
  47    ThreadQueue = pti->MessageQueue;
  48    return ThreadQueue != NULL ? ThreadQueue->FocusWindow : 0;
  49 }
  50
  51 VOID FASTCALL
  52 co_IntSendDeactivateMessages(HWND hWndPrev, HWND hWnd)
  53 {
  54     PWND WndPrev ;
  55
  56    if (hWndPrev && (WndPrev = UserGetWindowObject(hWndPrev)))
  57    {
  58       co_IntSendMessageNoWait(hWndPrev, WM_NCACTIVATE, FALSE, 0);
  59       co_IntSendMessageNoWait(hWndPrev, WM_ACTIVATE,
  60                  MAKEWPARAM(WA_INACTIVE, WndPrev->style & WS_MINIMIZE),
  61                  (LPARAM)hWnd);
  62    }
  63 }
  64
  65 VOID FASTCALL
  66 co_IntSendActivateMessages(HWND hWndPrev, HWND hWnd, BOOL MouseActivate)
  67 {
  68    USER_REFERENCE_ENTRY Ref, RefPrev;
  69    PWND Window, WindowPrev = NULL;
  70
  71    if ((Window = UserGetWindowObject(hWnd)))
  72    {
  73       UserRefObjectCo(Window, &Ref);
  74
  75       WindowPrev = UserGetWindowObject(hWndPrev);
  76
  77       if (WindowPrev) UserRefObjectCo(WindowPrev, &RefPrev);
  78
  79       /* Send palette messages */
  80       if (co_IntPostOrSendMessage(hWnd, WM_QUERYNEWPALETTE, 0, 0))
  81       {
  82          UserSendNotifyMessage( HWND_BROADCAST,
  83                                 WM_PALETTEISCHANGING,
  84                                (WPARAM)hWnd,
  85                                 0);
  86       }
  87
  88       if (Window->spwndPrev != NULL)
  89          co_WinPosSetWindowPos(Window, HWND_TOP, 0, 0, 0, 0,
  90                                SWP_NOSIZE | SWP_NOMOVE | SWP_NOACTIVATE | SWP_NOSENDCHANGING);
  91
  92       if (!Window->spwndOwner && !IntGetParent(Window))
  93       {
  94          co_IntShellHookNotify(HSHELL_WINDOWACTIVATED, (LPARAM) hWnd);
  95       }
  96
  97       if (Window)
  98       {  // Set last active for window and it's owner.
  99          Window->hWndLastActive = hWnd;
 100          if (Window->spwndOwner)
 101             Window->spwndOwner->hWndLastActive = hWnd;
 102          Window->state |= WNDS_ACTIVEFRAME;
 103       }
 104
 105       if (WindowPrev)
 106          WindowPrev->state &= ~WNDS_ACTIVEFRAME;
 107
 108       if (Window && WindowPrev)
 109       {
 110          PWND cWindow;
 111          HWND *List, *phWnd;
 112          HANDLE OldTID = IntGetWndThreadId(WindowPrev);
 113          HANDLE NewTID = IntGetWndThreadId(Window);
 114
 115          DPRINT("SendActiveMessage Old -> %x, New -> %x\n", OldTID, NewTID);
 116          if (Window->style & WS_MINIMIZE)
 117          {
 118             DPRINT("Widow was minimized\n");
 119          }
 120
 121          if (OldTID != NewTID)
 122          {
 123             List = IntWinListChildren(UserGetWindowObject(IntGetDesktopWindow()));
 124             if (List)
 125             {
 126                for (phWnd = List; *phWnd; ++phWnd)
 127                {
 128                   cWindow = UserGetWindowObject(*phWnd);
 129
 130                   if (cWindow && (IntGetWndThreadId(cWindow) == OldTID))
 131                   {  // FALSE if the window is being deactivated,
 132                      // ThreadId that owns the window being activated.
 133                     co_IntSendMessageNoWait(*phWnd, WM_ACTIVATEAPP, FALSE, (LPARAM)NewTID);
 134                   }
 135                }
 136                for (phWnd = List; *phWnd; ++phWnd)
 137                {
 138                   cWindow = UserGetWindowObject(*phWnd);
 139                   if (cWindow && (IntGetWndThreadId(cWindow) == NewTID))
 140                   { // TRUE if the window is being activated,
 141                     // ThreadId that owns the window being deactivated.
 142                     co_IntSendMessageNoWait(*phWnd, WM_ACTIVATEAPP, TRUE, (LPARAM)OldTID);
 143                   }
 144                }
 145                ExFreePool(List);
 146             }
 147          }
 148          UserDerefObjectCo(WindowPrev); // Now allow the previous window to die.
 149       }
 150
 151       UserDerefObjectCo(Window);
 152
 153       /* FIXME: IntIsWindow */
 154       co_IntSendMessageNoWait(hWnd, WM_NCACTIVATE, (WPARAM)(hWnd == UserGetForegroundWindow()), 0);
 155       /* FIXME: WA_CLICKACTIVE */
 156       co_IntSendMessageNoWait(hWnd, WM_ACTIVATE,
 157                               MAKEWPARAM(MouseActivate ? WA_CLICKACTIVE : WA_ACTIVE,
 158                               Window->style & WS_MINIMIZE),
 159                               (LPARAM)hWndPrev);
 160    }
 161 }
 162
 163 VOID FASTCALL
 164 co_IntSendKillFocusMessages(HWND hWndPrev, HWND hWnd)
 165 {
 166    if (hWndPrev)
 167    {
 168       IntNotifyWinEvent(EVENT_OBJECT_FOCUS, NULL, OBJID_CLIENT, CHILDID_SELF, 0);
 169       co_IntPostOrSendMessage(hWndPrev, WM_KILLFOCUS, (WPARAM)hWnd, 0);
 170    }
 171 }
 172
 173 VOID FASTCALL
 174 co_IntSendSetFocusMessages(HWND hWndPrev, HWND hWnd)
 175 {
 176    if (hWnd)
 177    {
 178       PWND pWnd = UserGetWindowObject(hWnd);
 179       IntNotifyWinEvent(EVENT_OBJECT_FOCUS, pWnd, OBJID_CLIENT, CHILDID_SELF, 0);
 180       co_IntPostOrSendMessage(hWnd, WM_SETFOCUS, (WPARAM)hWndPrev, 0);
 181    }
 182 }
 183
 184 HWND FASTCALL
 185 IntFindChildWindowToOwner(PWND Root, PWND Owner)
 186 {
 187    HWND Ret;
 188    PWND Child, OwnerWnd;
 189
 190    for(Child = Root->spwndChild; Child; Child = Child->spwndNext)
 191    {
 192        OwnerWnd = Child->spwndOwner;
 193       if(!OwnerWnd)
 194          continue;
 195
 196       if(OwnerWnd == Owner)
 197       {
 198          Ret = Child->head.h;
 199          return Ret;
 200       }
 201    }
 202
 203    return NULL;
 204 }
 205
 206 static BOOL FASTCALL
 207 co_IntSetForegroundAndFocusWindow(PWND Wnd, PWND FocusWindow, BOOL MouseActivate)
 208 {
 209    HWND hWnd = Wnd->head.h;
 210    HWND hWndPrev = NULL;
 211    HWND hWndFocus = FocusWindow->head.h;
 212    HWND hWndFocusPrev = NULL;
 213    PUSER_MESSAGE_QUEUE PrevForegroundQueue;
 214
 215    ASSERT_REFS_CO(Wnd);
 216
 217    DPRINT("IntSetForegroundAndFocusWindow(%x, %x, %s)\n", hWnd, hWndFocus, MouseActivate ? "TRUE" : "FALSE");
 218
 219    if ((Wnd->style & (WS_CHILD | WS_POPUP)) == WS_CHILD)
 220    {
 221       DPRINT("Failed - Child\n");
 222       return FALSE;
 223    }
 224
 225    if (0 == (Wnd->style & WS_VISIBLE) &&
 226        Wnd->head.pti->pEThread->ThreadsProcess != CsrProcess)
 227    {
 228       DPRINT("Failed - Invisible\n");
 229       return FALSE;
 230    }
 231
 232    PrevForegroundQueue = IntGetFocusMessageQueue();
 233    if (PrevForegroundQueue != 0)
 234    {
 235       hWndPrev = PrevForegroundQueue->ActiveWindow;
 236       hWndFocusPrev = PrevForegroundQueue->FocusWindow;
 237    }
 238
 239    if (hWndPrev == hWnd)
 240    {
 241       DPRINT("Failed - Same\n");
 242       return TRUE;
 243    }
 244
 245    /* FIXME: Call hooks. */
 246
 247    co_IntSendDeactivateMessages(hWndPrev, hWnd);
 248    co_IntSendKillFocusMessages(hWndFocusPrev, hWndFocus);
 249
 250
 251    IntSetFocusMessageQueue(Wnd->head.pti->MessageQueue);
 252
 253    if (Wnd->head.pti->MessageQueue)
 254    {
 255       Wnd->head.pti->MessageQueue->ActiveWindow = hWnd;
 256    }
 257
 258    if (FocusWindow->head.pti->MessageQueue)
 259    {
 260       FocusWindow->head.pti->MessageQueue->FocusWindow = hWndFocus;
 261    }
 262
 263    if (PrevForegroundQueue != Wnd->head.pti->MessageQueue)
 264    {
 265       /* FIXME: Send WM_ACTIVATEAPP to all thread windows. */
 266    }
 267
 268    co_IntSendSetFocusMessages(hWndFocusPrev, hWndFocus);
 269    co_IntSendActivateMessages(hWndPrev, hWnd, MouseActivate);
 270
 271    return TRUE;
 272 }
 273
 274 BOOL FASTCALL
 275 co_IntSetForegroundWindow(PWND Window)//FIXME: can Window be NULL??
 276 {
 277    /*if (Window)*/ ASSERT_REFS_CO(Window);
 278
 279    return co_IntSetForegroundAndFocusWindow(Window, Window, FALSE);
 280 }
 281
 282 BOOL FASTCALL
 283 co_IntMouseActivateWindow(PWND Wnd)
 284 {
 285    HWND Top;
 286    PWND TopWindow;
 287    USER_REFERENCE_ENTRY Ref;
 288
 289    ASSERT_REFS_CO(Wnd);
 290
 291    if(Wnd->style & WS_DISABLED)
 292    {
 293       BOOL Ret;
 294       PWND TopWnd;
 295       PWND DesktopWindow = UserGetWindowObject(IntGetDesktopWindow());
 296       if(DesktopWindow)
 297       {
 298          Top = IntFindChildWindowToOwner(DesktopWindow, Wnd);
 299          if((TopWnd = UserGetWindowObject(Top)))
 300          {
 301             UserRefObjectCo(TopWnd, &Ref);
 302             Ret = co_IntMouseActivateWindow(TopWnd);
 303             UserDerefObjectCo(TopWnd);
 304
 305             return Ret;
 306          }
 307       }
 308       return FALSE;
 309    }
 310
 311
 312    TopWindow = UserGetAncestor(Wnd, GA_ROOT);
 313    if (!TopWindow) return FALSE;
 314
 315    /* TMN: Check return valud from this function? */
 316    UserRefObjectCo(TopWindow, &Ref);
 317
 318    co_IntSetForegroundAndFocusWindow(TopWindow, Wnd, TRUE);
 319
 320    UserDerefObjectCo(TopWindow);
 321
 322    return TRUE;
 323 }
 324
 325 HWND FASTCALL
 326 co_IntSetActiveWindow(PWND Wnd OPTIONAL)
 327 {
 328    PTHREADINFO pti;
 329    PUSER_MESSAGE_QUEUE ThreadQueue;
 330    HWND hWndPrev;
 331    HWND hWnd = 0;
 332    CBTACTIVATESTRUCT cbt;
 333
 334    if (Wnd)
 335       ASSERT_REFS_CO(Wnd);
 336
 337    pti = PsGetCurrentThreadWin32Thread();
 338    ThreadQueue = pti->MessageQueue;
 339    ASSERT(ThreadQueue != 0);
 340
 341    if (Wnd != 0)
 342    {
 343       if ((!(Wnd->style & WS_VISIBLE) &&
 344            Wnd->head.pti->pEThread->ThreadsProcess != CsrProcess) ||
 345           (Wnd->style & (WS_POPUP | WS_CHILD)) == WS_CHILD)
 346       {
 347          return ThreadQueue ? 0 : ThreadQueue->ActiveWindow;
 348       }
 349       hWnd = Wnd->head.h;
 350    }
 351
 352    hWndPrev = ThreadQueue->ActiveWindow;
 353    if (hWndPrev == hWnd)
 354    {
 355       return hWndPrev;
 356    }
 357
 358    /* call CBT hook chain */
 359    cbt.fMouse     = FALSE;
 360    cbt.hWndActive = hWndPrev;
 361    if (co_HOOK_CallHooks( WH_CBT, HCBT_ACTIVATE, (WPARAM)hWnd, (LPARAM)&cbt))
 362    {
 363       DPRINT1("SetActiveWindow WH_CBT Call Hook return!\n");
 364       return 0;
 365    }
 366    ThreadQueue->ActiveWindow = hWnd;
 367
 368    co_IntSendDeactivateMessages(hWndPrev, hWnd);
 369    co_IntSendActivateMessages(hWndPrev, hWnd, FALSE);
 370
 371    /* FIXME */
 372    /*   return IntIsWindow(hWndPrev) ? hWndPrev : 0;*/
 373    return hWndPrev;
 374 }
 375
 376 static
 377 HWND FASTCALL
 378 co_IntSetFocusWindow(PWND Window OPTIONAL)
 379 {
 380    HWND hWndPrev = 0;
 381    PTHREADINFO pti;
 382    PUSER_MESSAGE_QUEUE ThreadQueue;
 383
 384    if (Window)
 385       ASSERT_REFS_CO(Window);
 386
 387    pti = PsGetCurrentThreadWin32Thread();
 388    ThreadQueue = pti->MessageQueue;
 389    ASSERT(ThreadQueue != 0);
 390
 391    hWndPrev = ThreadQueue->FocusWindow;
 392
 393    if (Window != 0)
 394    {
 395       if (hWndPrev == Window->head.h)
 396       {
 397          return hWndPrev;
 398       }
 399
 400       if (co_HOOK_CallHooks( WH_CBT, HCBT_SETFOCUS, (WPARAM)Window->head.h, (LPARAM)hWndPrev))
 401       {
 402          DPRINT1("SetFocusWindow 1 WH_CBT Call Hook return!\n");
 403          return 0;
 404       }
 405       ThreadQueue->FocusWindow = Window->head.h;
 406
 407       co_IntSendKillFocusMessages(hWndPrev, Window->head.h);
 408       co_IntSendSetFocusMessages(hWndPrev, Window->head.h);
 409    }
 410    else
 411    {
 412       ThreadQueue->FocusWindow = 0;
 413       if (co_HOOK_CallHooks( WH_CBT, HCBT_SETFOCUS, (WPARAM)0, (LPARAM)hWndPrev))
 414       {
 415          DPRINT1("SetFocusWindow 2 WH_CBT Call Hook return!\n");
 416          return 0;
 417       }
 418
 419       co_IntSendKillFocusMessages(hWndPrev, 0);
 420    }
 421    return hWndPrev;
 422 }
 423
 424
 425 /*
 426  * @implemented
 427  */
 428 HWND FASTCALL
 429 UserGetForegroundWindow(VOID)
 430 {
 431    PUSER_MESSAGE_QUEUE ForegroundQueue;
 432
 433    ForegroundQueue = IntGetFocusMessageQueue();
 434    return( ForegroundQueue != NULL ? ForegroundQueue->ActiveWindow : 0);
 435 }
 436
 437
 438 /*
 439  * @implemented
 440  */
 441 HWND APIENTRY
 442 NtUserGetForegroundWindow(VOID)
 443 {
 444    DECLARE_RETURN(HWND);
 445
 446    DPRINT("Enter NtUserGetForegroundWindow\n");
 447    UserEnterExclusive();
 448
 449    RETURN( UserGetForegroundWindow());
 450
 451 CLEANUP:
 452    DPRINT("Leave NtUserGetForegroundWindow, ret=%i\n",_ret_);
 453    UserLeave();
 454    END_CLEANUP;
 455 }
 456
 457
 458 HWND FASTCALL UserGetActiveWindow(VOID)
 459 {
 460    PTHREADINFO pti;
 461    PUSER_MESSAGE_QUEUE ThreadQueue;
 462
 463    pti = PsGetCurrentThreadWin32Thread();
 464    ThreadQueue = pti->MessageQueue;
 465    return( ThreadQueue ? ThreadQueue->ActiveWindow : 0);
 466 }
 467
 468
 469 HWND APIENTRY
 470 NtUserSetActiveWindow(HWND hWnd)
 471 {
 472    USER_REFERENCE_ENTRY Ref;
 473    DECLARE_RETURN(HWND);
 474
 475    DPRINT("Enter NtUserSetActiveWindow(%x)\n", hWnd);
 476    UserEnterExclusive();
 477
 478    if (hWnd)
 479    {
 480       PWND Window;
 481       PTHREADINFO pti;
 482       PUSER_MESSAGE_QUEUE ThreadQueue;
 483       HWND hWndPrev;
 484
 485       if (!(Window = UserGetWindowObject(hWnd)))
 486       {
 487          RETURN( 0);
 488       }
 489
 490       pti = PsGetCurrentThreadWin32Thread();
 491       ThreadQueue = pti->MessageQueue;
 492
 493       if (Window->head.pti->MessageQueue != ThreadQueue)
 494       {
 495          EngSetLastError(ERROR_INVALID_WINDOW_HANDLE);
 496          RETURN( 0);
 497       }
 498
 499       UserRefObjectCo(Window, &Ref);
 500       hWndPrev = co_IntSetActiveWindow(Window);
 501       UserDerefObjectCo(Window);
 502
 503       RETURN( hWndPrev);
 504    }
 505    else
 506    {
 507       RETURN( co_IntSetActiveWindow(0));
 508    }
 509
 510 CLEANUP:
 511    DPRINT("Leave NtUserSetActiveWindow, ret=%i\n",_ret_);
 512    UserLeave();
 513    END_CLEANUP;
 514 }
 515
 516 /*
 517  * @implemented
 518  */
 519 HWND APIENTRY
 520 IntGetCapture(VOID)
 521 {
 522    PTHREADINFO pti;
 523    PUSER_MESSAGE_QUEUE ThreadQueue;
 524    DECLARE_RETURN(HWND);
 525
 526    DPRINT("Enter IntGetCapture\n");
 527
 528    pti = PsGetCurrentThreadWin32Thread();
 529    ThreadQueue = pti->MessageQueue;
 530    RETURN( ThreadQueue ? ThreadQueue->CaptureWindow : 0);
 531
 532 CLEANUP:
 533    DPRINT("Leave IntGetCapture, ret=%i\n",_ret_);
 534    END_CLEANUP;
 535 }
 536
 537
 538 HWND FASTCALL
 539 co_UserSetCapture(HWND hWnd)
 540 {
 541    PTHREADINFO pti;
 542    PUSER_MESSAGE_QUEUE ThreadQueue;
 543    PWND Window, pWnd;
 544    HWND hWndPrev;
 545
 546    pti = PsGetCurrentThreadWin32Thread();
 547    ThreadQueue = pti->MessageQueue;
 548
 549    if ((Window = UserGetWindowObject(hWnd)))
 550    {
 551       if (Window->head.pti->MessageQueue != ThreadQueue)
 552       {
 553          return NULL;
 554       }
 555    }
 556
 557    hWndPrev = MsqSetStateWindow(ThreadQueue, MSQ_STATE_CAPTURE, hWnd);
 558
 559    if (hWndPrev)
 560    {
 561       pWnd = UserGetWindowObject(hWndPrev);
 562       if (pWnd)
 563          IntNotifyWinEvent(EVENT_SYSTEM_CAPTUREEND, pWnd, OBJID_WINDOW, CHILDID_SELF, WEF_SETBYWNDPTI);
 564    }
 565
 566    /* also remove other windows if not capturing anymore */
 567    if (hWnd == NULL)
 568    {
 569       MsqSetStateWindow(ThreadQueue, MSQ_STATE_MENUOWNER, NULL);
 570       MsqSetStateWindow(ThreadQueue, MSQ_STATE_MOVESIZE, NULL);
 571    }
 572
 573    if (Window)
 574       IntNotifyWinEvent(EVENT_SYSTEM_CAPTURESTART, Window, OBJID_WINDOW, CHILDID_SELF, WEF_SETBYWNDPTI);
 575
 576    co_IntPostOrSendMessage(hWndPrev, WM_CAPTURECHANGED, 0, (LPARAM)hWnd);
 577    ThreadQueue->CaptureWindow = hWnd;
 578
 579    return hWndPrev;
 580 }
 581
 582 /*
 583  * @implemented
 584  */
 585 HWND APIENTRY
 586 NtUserSetCapture(HWND hWnd)
 587 {
 588    DECLARE_RETURN(HWND);
 589
 590    DPRINT("Enter NtUserSetCapture(%x)\n", hWnd);
 591    UserEnterExclusive();
 592
 593    RETURN( co_UserSetCapture(hWnd));
 594
 595 CLEANUP:
 596    DPRINT("Leave NtUserSetCapture, ret=%i\n",_ret_);
 597    UserLeave();
 598    END_CLEANUP;
 599 }
 600
 601
 602
 603 HWND FASTCALL co_UserSetFocus(PWND Wnd OPTIONAL)
 604 {
 605    if (Wnd)
 606    {
 607       PTHREADINFO pti;
 608       PUSER_MESSAGE_QUEUE ThreadQueue;
 609       HWND hWndPrev;
 610       PWND TopWnd;
 611       USER_REFERENCE_ENTRY Ref;
 612
 613       ASSERT_REFS_CO(Wnd);
 614
 615       pti = PsGetCurrentThreadWin32Thread();
 616       ThreadQueue = pti->MessageQueue;
 617
 618       if (Wnd->style & (WS_MINIMIZE | WS_DISABLED))
 619       {
 620          return( (ThreadQueue ? ThreadQueue->FocusWindow : 0));
 621       }
 622
 623       if (Wnd->head.pti->MessageQueue != ThreadQueue)
 624       {
 625          EngSetLastError(ERROR_INVALID_WINDOW_HANDLE);
 626          return( 0);
 627       }
 628
 629       TopWnd = UserGetAncestor(Wnd, GA_ROOT);
 630       if (TopWnd && TopWnd->head.h != UserGetActiveWindow())
 631       {
 632 //         PWND WndTops = UserGetWindowObject(hWndTop);
 633          UserRefObjectCo(TopWnd, &Ref);
 634          co_IntSetActiveWindow(TopWnd);
 635          UserDerefObjectCo(TopWnd);
 636       }
 637
 638       hWndPrev = co_IntSetFocusWindow(Wnd);
 639
 640       return( hWndPrev);
 641    }
 642    else
 643    {
 644       return( co_IntSetFocusWindow(NULL));
 645    }
 646
 647 }
 648
 649
 650 /*
 651  * @implemented
 652  */
 653 HWND APIENTRY
 654 NtUserSetFocus(HWND hWnd)
 655 {
 656    PWND Window;
 657    USER_REFERENCE_ENTRY Ref;
 658    DECLARE_RETURN(HWND);
 659    HWND ret;
 660
 661    DPRINT("Enter NtUserSetFocus(%x)\n", hWnd);
 662    UserEnterExclusive();
 663
 664    if (hWnd)
 665    {
 666       if (!(Window = UserGetWindowObject(hWnd)))
 667       {
 668          RETURN(NULL);
 669       }
 670
 671       UserRefObjectCo(Window, &Ref);
 672       ret = co_UserSetFocus(Window);
 673       UserDerefObjectCo(Window);
 674
 675       RETURN(ret);
 676    }
 677    else
 678    {
 679       RETURN( co_UserSetFocus(0));
 680    }
 681
 682 CLEANUP:
 683    DPRINT("Leave NtUserSetFocus, ret=%i\n",_ret_);
 684    UserLeave();
 685    END_CLEANUP;
 686 }
 687
 688 /* EOF */