[USER32] Fix GetWindowTextLength() blocking call using the same technique as in GetWi...
[reactos.git] / win32ss / user / user32 / windows / dc.c
1 /*
2 * ReactOS kernel
3 * Copyright (C) 1998, 1999, 2000, 2001 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
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
18 */
19 /*
20 * PROJECT: ReactOS user32.dll
21 * FILE: win32ss/user/user32/windows/dc.c
22 * PURPOSE: Input
23 * PROGRAMMER: Casper S. Hornstrup (chorns@users.sourceforge.net)
24 * UPDATE HISTORY:
25 * 09-05-2001 CSH Created
26 */
27
28 #include <user32.h>
29
30 BOOL
31 WINAPI
32 GdiReleaseDC(HDC hdc);
33
34 /*
35 * @implemented
36 */
37 int
38 WINAPI
39 ReleaseDC(HWND hWnd,
40 HDC hDC)
41 {
42 // From msdn: if the DC was not released return zero.
43 // if the DC was released return one.
44
45 if (!hDC) return FALSE; // Null hDC return zero.
46
47 GdiReleaseDC ( hDC ); // Release locals.
48
49 return NtUserxReleaseDC(hDC);
50 }
51
52
53 /*
54 * @implemented
55 */
56 HWND
57 WINAPI
58 WindowFromDC(HDC hDC)
59 {
60 return NtUserxWindowFromDC(hDC);
61 }