trunk/Src/wptW32API.cpp

/* wptW32API.cpp - Common W32 API functions
 *      Copyright (C) 2001, 2002, 2003 Timo Schulz
 *
 * This file is part of WinPT.
 *
 * WinPT is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 * 
 * WinPT is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with WinPT; if not, write to the Free Software Foundation, 
 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
 */

#include <windows.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <shellapi.h>
#include <shlobj.h>
#include <commctrl.h>

#include "wptNLS.h"
#include "wptW32API.h"
#include "wptErrors.h"
#include "wptVersion.h"
#include "wptTypes.h"


/*
 * The the text of a menu item.
 */
void
set_menu_text (HMENU menu, int m_uid, const char *text)
{
    MENUITEMINFO mii;
    char menu_text[80];
    
    memset (&mii, 0, sizeof (mii));
    mii.cbSize = sizeof (mii);
    mii.fMask = MIIM_TYPE;
    mii.dwTypeData = menu_text;
    mii.cch = sizeof (menu_text);
    GetMenuItemInfo (menu, m_uid, FALSE, &mii);
    
    memset (&mii, 0, sizeof mii);
    mii.cbSize = sizeof mii;
    mii.fMask = MIIM_TYPE;
    mii.fType = MFT_STRING;
    mii.dwTypeData = (char *) text;
    SetMenuItemInfo (menu, m_uid, FALSE, &mii);
} /* set_menu_text */


void
set_menu_state (HMENU menu, int m_uid, int state)
{       
    MENUITEMINFO mii;

    memset( &mii, 0, sizeof (mii) );
    mii.cbSize = sizeof (mii);
    mii.fMask = MIIM_STATE;
    mii.fState = state;
    SetMenuItemInfo (menu, m_uid, FALSE, &mii);
} /* set_menu_state */


const char *
get_filename_dlg (HWND hwnd, int id, const char * title, 
                  const char * filter, const char * name)
{
    static char file[512] = "";
    OPENFILENAME open;
    
    if (name && strlen (name) < (sizeof (file)-1))
        strcpy (file, name);
    else
        memset (file, 0, sizeof (file));
    if (!filter)
        filter = _("All Files (*.*)\0*.*");
    memset (&open, 0, sizeof (open));
    open.lStructSize = sizeof (OPENFILENAME);
    open.hInstance = glob_hinst;
    open.lpstrTitle = title;
    open.lpstrFilter = filter;
    open.hwndOwner = hwnd;
    open.lpstrFile = file;
    open.nMaxFile = sizeof (file) - 1;
    open.Flags = 0;

    if (id == 0 && GetOpenFileName (&open))
        return open.lpstrFile;
    else if (id == 1 && GetSaveFileName (&open))
        return open.lpstrFile;
    
    return NULL;
} /* get_filename_dlg */


const char * 
get_folder_dlg (HWND hwnd, const char * title, const char * name)
{
    static char folder[MAX_PATH] = "";
    BROWSEINFO bi;
    ITEMIDLIST * il;

    memset (&bi, 0, sizeof (bi));
    bi.hwndOwner = hwnd;
    if (title)
        bi.lpszTitle = title;
    if (name && strlen (name) < MAX_PATH-1)
        strcpy (folder, name);
    else
        memset (folder, 0, sizeof (folder));
    il = SHBrowseForFolder (&bi);
    if (il) {
        SHGetPathFromIDList (il, folder);
        return folder;
    }
    return NULL;
}


char*
get_clip_text (HWND hwnd)
{
    HANDLE clipmem;
    char *cliptxt, *p;  
    int len;
    
    if (OpenClipboard (hwnd) == FALSE)
        return NULL;
    clipmem = GetClipboardData (CF_TEXT);
    if (clipmem == NULL) {
        p = NULL;
        goto leave;
    }
    cliptxt = (char *) GlobalLock (clipmem);
    if (cliptxt == NULL) {
        p = NULL;
        goto leave;
    }
    
    len =  strlen (cliptxt);
    p = new char[len + 1];
    if (!p)
        BUG (NULL);
    memcpy (p, cliptxt, len);
    p[len] = '\0';
    GlobalUnlock (clipmem);
    
leave:
    CloseClipboard ();
    return p;
} /* get_clip_text */


int
set_clip_text (HWND hwnd, const char *text, int nbytes)
{    
    HANDLE clipmem;
    int rc = 0;
    char *p;
    
    if (OpenClipboard (hwnd) == FALSE)  
        return WPTERR_CLIP_OPEN;
    EmptyClipboard ();

    clipmem = GlobalAlloc (GHND, nbytes + 1);
    if (clipmem == NULL)
        BUG (NULL);
    p = (char *) GlobalLock (clipmem);
    if (p == NULL) {
        rc = WPTERR_GENERAL;;
        goto leave;     
    }
    memcpy (p, text, nbytes);
    p[nbytes] = '\0';
    
    GlobalUnlock (clipmem);
    SetClipboardData (CF_TEXT, clipmem);
    
leave:
    CloseClipboard ();
    return rc;
} /* set_clip_text */


int
set_clip_text2 (HWND hwnd, const char *text, int nbytes, int head_foot)
{
    char *p, *new_text;

    p = get_clip_text (hwnd);
    if (!p)
        return WPTERR_CLIP_GET;
    new_text = new char [strlen (p)+strlen (text)+8];
    if (!new_text)
        BUG (0);
    if (head_foot == 0)
        sprintf (new_text, "%s\r\n%s\r\n\r\n", text, p);
    else
        sprintf (new_text, "%s\n%s\n\n", p, text);
    set_clip_text (hwnd, new_text, strlen (new_text)+1);
    free_if_alloc (p);
    free_if_alloc (new_text);
    return 0;
}


char*
make_filename( const char *path, const char *file, const char *ext )
{
    char *p;
    size_t size = 0;

    if( path && *path )
        size += strlen( path );
    if( file && *file )
        size += strlen( file );
    if( ext && *ext )
        size += strlen( ext );
    p = new char[size + 4];
    memset( p, 0, size );
    if( path ) {
        strcat( p, path );
        if( path[strlen( path ) -1] != '\\' )
            strcat( p, "\\" );
    }
    if( file )
        strcat( p, file );
    if( ext ) {
        strcat( p, "." );
        strcat( p, ext );
    }
    return p;
} /* make_filename */


/* return 0 if it exists, otherwise >0. */
int
file_exist_check (const char * fname)
{       
    HANDLE fh;  

    fh = CreateFile( fname, GENERIC_READ, FILE_SHARE_READ, 
                     NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL );
    if( fh == INVALID_HANDLE_VALUE )
        return WPTERR_FILE_EXIST;
    CloseHandle( fh );
    return 0;
} /* file_exist_check */


int
dir_exist_check( const char *dir )
{
    struct stat statbuf;    
    
    if( stat( dir, &statbuf ) == -1 )
        return WPTERR_GENERAL;
    if( statbuf.st_mode & _S_IFDIR )
        return 0;
    return WPTERR_GENERAL;
} /* dir_exist_check */


size_t
get_file_size( const char *fname )
{
    size_t fsize;
    HANDLE fh;

    fh = CreateFile( fname, GENERIC_READ, FILE_SHARE_READ,
                    NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL ); 
    if( fh == INVALID_HANDLE_VALUE )
        return 0;
    fsize = GetFileSize( fh, NULL );
    if( fsize == 0xFFFFFFFF )
        fsize = 0;
    CloseHandle( fh );
    return fsize;
} /* get_file_size */


int
init_file_lock( LOCK *ctx, const char *file )
{
    
    ctx->size = get_file_size( file );
    ctx->file = m_strdup( file );
    ctx->fh = CreateFile( file, GENERIC_READ, FILE_SHARE_READ, NULL, 
                         OPEN_ALWAYS, 0, NULL );
    if( ctx->fh == INVALID_HANDLE_VALUE )
        return WPTERR_GENERAL;
    if( LockFile( ctx->fh, 0, 0, ctx->size, 0 ) == FALSE ) {
        CloseHandle( ctx->fh );
        ctx->fh = INVALID_HANDLE_VALUE;
        ctx->size = 0;
        free( ctx->file );
        return WPTERR_GENERAL;
    }
    return 0;
} /* init_file_lock */


void
release_file_lock( LOCK *ctx )
{
    free_if_alloc( ctx->file );
    ctx->file = NULL;
    ctx->size = 0;
    CloseHandle( ctx->fh );
} /* release_file_lock */


int
dialog_box_param( HINSTANCE hinst, LPCTSTR name, HWND parent, DLGPROC fnc, 
                                  LPARAM param, LPCTSTR title, int title_id )
{
    #ifndef LANG_DE
    if( FindWindowEx( GetDesktopWindow(), NULL, NULL, title ) )
        return -1;      
    #else
    char strdesc[256];
    LoadString( glob_hinst, title_id, strdesc, sizeof (strdesc) -1 );
    if( FindWindowEx( GetDesktopWindow(), NULL, NULL, strdesc ) )
        return -1;
    #endif
    
    return DialogBoxParam( hinst, name, parent, fnc, param );
} /* dialog_box_param */


int
msg_box( HWND hwnd, const char *text, const char *title, int mode )
{
    mode |= MB_SETFOREGROUND;
    mode |= MB_TASKMODAL;
    mode |= MB_TOPMOST;
    return MessageBox(hwnd, text, title, mode);
} /* msg_box */


void
set_active_window( HWND dlg )
{       
    activ_hwnd = dlg;
} /* set_active_window */

void
reset_active_window( void )
{       
    activ_hwnd = NULL;
} /* reset_active_window */


static DWORD CALLBACK 
reminder_thread( void *ctx )
{
    reminder_ctx_s *c = (reminder_ctx_s *)ctx;

    Sleep( c->msecs );
    SetForegroundWindow( activ_hwnd );

    return 0;
} /* reminder_thread */

HANDLE
window_reminder( struct reminder_ctx_s *ctx )
{
    DWORD tid = 0;
    
    return CreateThread( NULL, 0, reminder_thread, ctx, 0, &tid );
} /* window_reminder */


char *
m_strdup( const char *str )
{
    char * p = new char[strlen( str ) + 1];
    if( p )
        strcpy( p, str );
    return p;
} /* m_strdup */


void
center_window2 (HWND hwndChild, HWND style) 
{     
    HWND hwndParent;
    RECT rChild, rParent;    
    HDC hdc;
    int wChild, hChild, wParent, hParent;     
    int wScreen, hScreen, xNew, yNew;
    int flags = SWP_NOSIZE | SWP_NOZORDER;

    hwndParent = GetDesktopWindow ();
    GetWindowRect (hwndChild, &rChild);     
    wChild = rChild.right - rChild.left;     
    hChild = rChild.bottom - rChild.top;

    GetWindowRect (hwndParent, &rParent);     
    wParent = rParent.right - rParent.left;     
    hParent = rParent.bottom - rParent.top;      
    
    hdc = GetDC (hwndChild);     
    wScreen = GetDeviceCaps (hdc, HORZRES);     
    hScreen = GetDeviceCaps (hdc, VERTRES);     
    ReleaseDC (hwndChild, hdc);      
    xNew = rParent.left + ((wParent - wChild) /2);     
    if (xNew < 0)
        xNew = 0;
    else if ((xNew+wChild) > wScreen) 
        xNew = wScreen - wChild;
    yNew = rParent.top  + ((hParent - hChild) /2);
    if (yNew < 0)
        yNew = 0;
    else if ((yNew+hChild) > hScreen)
        yNew = hScreen - hChild;
    if (style == HWND_TOPMOST || style == HWND_NOTOPMOST)
        flags = SWP_NOMOVE | SWP_NOSIZE;
    SetWindowPos (hwndChild, style? style : NULL, xNew, yNew, 0, 0, flags);
}


void
center_window (HWND hwndChild) 
{
    center_window2 (hwndChild, NULL);
}
1	twoaday	2	/* wptW32API.cpp - Common W32 API functions
2			* Copyright (C) 2001, 2002, 2003 Timo Schulz
3			*
4			* This file is part of WinPT.
5			*
6			* WinPT is free software; you can redistribute it and/or modify
7			* it under the terms of the GNU General Public License as published by
8			* the Free Software Foundation; either version 2 of the License, or
9			* (at your option) any later version.
10			*
11			* WinPT is distributed in the hope that it will be useful,
12			* but WITHOUT ANY WARRANTY; without even the implied warranty of
13			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14			* GNU General Public License for more details.
15			*
16			* You should have received a copy of the GNU General Public License
17			* along with WinPT; if not, write to the Free Software Foundation,
18			* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
19			*/
20
21			#include <windows.h>
22			#include <stdio.h>
23			#include <sys/types.h>
24			#include <sys/stat.h>
25			#include <shellapi.h>
26			#include <shlobj.h>
27			#include <commctrl.h>
28
29			#include "wptNLS.h"
30			#include "wptW32API.h"
31			#include "wptErrors.h"
32			#include "wptVersion.h"
33			#include "wptTypes.h"
34
35
36			/*
37			* The the text of a menu item.
38			*/
39			void
40			set_menu_text (HMENU menu, int m_uid, const char *text)
41			{
42			MENUITEMINFO mii;
43			char menu_text[80];
44
45			memset (&mii, 0, sizeof (mii));
46			mii.cbSize = sizeof (mii);
47			mii.fMask = MIIM_TYPE;
48			mii.dwTypeData = menu_text;
49			mii.cch = sizeof (menu_text);
50			GetMenuItemInfo (menu, m_uid, FALSE, &mii);
51
52			memset (&mii, 0, sizeof mii);
53			mii.cbSize = sizeof mii;
54			mii.fMask = MIIM_TYPE;
55			mii.fType = MFT_STRING;
56			mii.dwTypeData = (char *) text;
57			SetMenuItemInfo (menu, m_uid, FALSE, &mii);
58			} /* set_menu_text */
59
60
61			void
62			set_menu_state (HMENU menu, int m_uid, int state)
63			{
64			MENUITEMINFO mii;
65
66			memset( &mii, 0, sizeof (mii) );
67			mii.cbSize = sizeof (mii);
68			mii.fMask = MIIM_STATE;
69			mii.fState = state;
70			SetMenuItemInfo (menu, m_uid, FALSE, &mii);
71			} /* set_menu_state */
72
73
74
75			const char *
76			get_filename_dlg (HWND hwnd, int id, const char * title,
77			const char * filter, const char * name)
78			{
79			static char file[512] = "";
80			OPENFILENAME open;
81
82			if (name && strlen (name) < (sizeof (file)-1))
83			strcpy (file, name);
84			else
85			memset (file, 0, sizeof (file));
86			if (!filter)
87			filter = _("All Files (.)\0.");
88			memset (&open, 0, sizeof (open));
89			open.lStructSize = sizeof (OPENFILENAME);
90			open.hInstance = glob_hinst;
91			open.lpstrTitle = title;
92			open.lpstrFilter = filter;
93			open.hwndOwner = hwnd;
94			open.lpstrFile = file;
95			open.nMaxFile = sizeof (file) - 1;
96			open.Flags = 0;
97
98			if (id == 0 && GetOpenFileName (&open))
99			return open.lpstrFile;
100			else if (id == 1 && GetSaveFileName (&open))
101			return open.lpstrFile;
102
103			return NULL;
104			} /* get_filename_dlg */
105
106
107			const char *
108			get_folder_dlg (HWND hwnd, const char * title, const char * name)
109			{
110			static char folder[MAX_PATH] = "";
111			BROWSEINFO bi;
112			ITEMIDLIST * il;
113
114			memset (&bi, 0, sizeof (bi));
115			bi.hwndOwner = hwnd;
116			if (title)
117			bi.lpszTitle = title;
118			if (name && strlen (name) < MAX_PATH-1)
119			strcpy (folder, name);
120			else
121			memset (folder, 0, sizeof (folder));
122			il = SHBrowseForFolder (&bi);
123			if (il) {
124			SHGetPathFromIDList (il, folder);
125			return folder;
126			}
127			return NULL;
128			}
129
130
131			char*
132			get_clip_text (HWND hwnd)
133			{
134			HANDLE clipmem;
135			char cliptxt, p;
136			int len;
137
138			if (OpenClipboard (hwnd) == FALSE)
139			return NULL;
140			clipmem = GetClipboardData (CF_TEXT);
141			if (clipmem == NULL) {
142			p = NULL;
143			goto leave;
144			}
145			cliptxt = (char *) GlobalLock (clipmem);
146			if (cliptxt == NULL) {
147			p = NULL;
148			goto leave;
149			}
150
151			len = strlen (cliptxt);
152			p = new char[len + 1];
153			if (!p)
154			BUG (NULL);
155			memcpy (p, cliptxt, len);
156			p[len] = '\0';
157			GlobalUnlock (clipmem);
158
159			leave:
160			CloseClipboard ();
161			return p;
162			} /* get_clip_text */
163
164
165			int
166			set_clip_text (HWND hwnd, const char *text, int nbytes)
167			{
168			HANDLE clipmem;
169			int rc = 0;
170			char *p;
171
172			if (OpenClipboard (hwnd) == FALSE)
173			return WPTERR_CLIP_OPEN;
174			EmptyClipboard ();
175
176			clipmem = GlobalAlloc (GHND, nbytes + 1);
177			if (clipmem == NULL)
178			BUG (NULL);
179			p = (char *) GlobalLock (clipmem);
180			if (p == NULL) {
181			rc = WPTERR_GENERAL;;
182			goto leave;
183			}
184			memcpy (p, text, nbytes);
185			p[nbytes] = '\0';
186
187			GlobalUnlock (clipmem);
188			SetClipboardData (CF_TEXT, clipmem);
189
190			leave:
191			CloseClipboard ();
192			return rc;
193			} /* set_clip_text */
194
195
196			int
197			set_clip_text2 (HWND hwnd, const char *text, int nbytes, int head_foot)
198			{
199			char p, new_text;
200
201			p = get_clip_text (hwnd);
202			if (!p)
203			return WPTERR_CLIP_GET;
204			new_text = new char [strlen (p)+strlen (text)+8];
205			if (!new_text)
206			BUG (0);
207			if (head_foot == 0)
208			sprintf (new_text, "%s\r\n%s\r\n\r\n", text, p);
209			else
210			sprintf (new_text, "%s\n%s\n\n", p, text);
211			set_clip_text (hwnd, new_text, strlen (new_text)+1);
212			free_if_alloc (p);
213			free_if_alloc (new_text);
214			return 0;
215			}
216
217
218			char*
219			make_filename( const char path, const char file, const char *ext )
220			{
221			char *p;
222			size_t size = 0;
223
224			if( path && *path )
225			size += strlen( path );
226			if( file && *file )
227			size += strlen( file );
228			if( ext && *ext )
229			size += strlen( ext );
230			p = new char[size + 4];
231			memset( p, 0, size );
232			if( path ) {
233			strcat( p, path );
234			if( path[strlen( path ) -1] != '\\' )
235			strcat( p, "\\" );
236			}
237			if( file )
238			strcat( p, file );
239			if( ext ) {
240			strcat( p, "." );
241			strcat( p, ext );
242			}
243			return p;
244			} /* make_filename */
245
246
247			/* return 0 if it exists, otherwise >0. */
248			int
249			file_exist_check (const char * fname)
250			{
251			HANDLE fh;
252
253			fh = CreateFile( fname, GENERIC_READ, FILE_SHARE_READ,
254			NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL );
255			if( fh == INVALID_HANDLE_VALUE )
256			return WPTERR_FILE_EXIST;
257			CloseHandle( fh );
258			return 0;
259			} /* file_exist_check */
260
261
262			int
263			dir_exist_check( const char *dir )
264			{
265			struct stat statbuf;
266
267			if( stat( dir, &statbuf ) == -1 )
268			return WPTERR_GENERAL;
269			if( statbuf.st_mode & _S_IFDIR )
270			return 0;
271			return WPTERR_GENERAL;
272			} /* dir_exist_check */
273
274
275			size_t
276			get_file_size( const char *fname )
277			{
278			size_t fsize;
279			HANDLE fh;
280
281			fh = CreateFile( fname, GENERIC_READ, FILE_SHARE_READ,
282			NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL );
283			if( fh == INVALID_HANDLE_VALUE )
284			return 0;
285			fsize = GetFileSize( fh, NULL );
286			if( fsize == 0xFFFFFFFF )
287			fsize = 0;
288			CloseHandle( fh );
289			return fsize;
290			} /* get_file_size */
291
292
293			int
294			init_file_lock( LOCK ctx, const char file )
295			{
296
297			ctx->size = get_file_size( file );
298			ctx->file = m_strdup( file );
299			ctx->fh = CreateFile( file, GENERIC_READ, FILE_SHARE_READ, NULL,
300			OPEN_ALWAYS, 0, NULL );
301			if( ctx->fh == INVALID_HANDLE_VALUE )
302			return WPTERR_GENERAL;
303			if( LockFile( ctx->fh, 0, 0, ctx->size, 0 ) == FALSE ) {
304			CloseHandle( ctx->fh );
305			ctx->fh = INVALID_HANDLE_VALUE;
306			ctx->size = 0;
307			free( ctx->file );
308			return WPTERR_GENERAL;
309			}
310			return 0;
311			} /* init_file_lock */
312
313
314			void
315			release_file_lock( LOCK *ctx )
316			{
317			free_if_alloc( ctx->file );
318			ctx->file = NULL;
319			ctx->size = 0;
320			CloseHandle( ctx->fh );
321			} /* release_file_lock */
322
323
324			int
325			dialog_box_param( HINSTANCE hinst, LPCTSTR name, HWND parent, DLGPROC fnc,
326			LPARAM param, LPCTSTR title, int title_id )
327			{
328	twoaday	6	#ifndef LANG_DE
329	twoaday	2	if( FindWindowEx( GetDesktopWindow(), NULL, NULL, title ) )
330			return -1;
331	twoaday	6	#else
332	twoaday	2	char strdesc[256];
333			LoadString( glob_hinst, title_id, strdesc, sizeof (strdesc) -1 );
334			if( FindWindowEx( GetDesktopWindow(), NULL, NULL, strdesc ) )
335			return -1;
336	twoaday	6	#endif
337	twoaday	2
338			return DialogBoxParam( hinst, name, parent, fnc, param );
339			} /* dialog_box_param */
340
341
342			int
343			msg_box( HWND hwnd, const char text, const char title, int mode )
344			{
345			mode \|= MB_SETFOREGROUND;
346			mode \|= MB_TASKMODAL;
347			mode \|= MB_TOPMOST;
348			return MessageBox(hwnd, text, title, mode);
349			} /* msg_box */
350
351
352			void
353			set_active_window( HWND dlg )
354			{
355			activ_hwnd = dlg;
356			} /* set_active_window */
357
358			void
359			reset_active_window( void )
360			{
361			activ_hwnd = NULL;
362			} /* reset_active_window */
363
364
365			static DWORD CALLBACK
366			reminder_thread( void *ctx )
367			{
368			reminder_ctx_s c = (reminder_ctx_s )ctx;
369
370			Sleep( c->msecs );
371			SetForegroundWindow( activ_hwnd );
372
373			return 0;
374			} /* reminder_thread */
375
376			HANDLE
377			window_reminder( struct reminder_ctx_s *ctx )
378			{
379			DWORD tid = 0;
380
381			return CreateThread( NULL, 0, reminder_thread, ctx, 0, &tid );
382			} /* window_reminder */
383
384
385			char *
386			m_strdup( const char *str )
387			{
388			char * p = new char[strlen( str ) + 1];
389			if( p )
390			strcpy( p, str );
391			return p;
392			} /* m_strdup */
393
394
395			void
396			center_window2 (HWND hwndChild, HWND style)
397			{
398			HWND hwndParent;
399			RECT rChild, rParent;
400			HDC hdc;
401			int wChild, hChild, wParent, hParent;
402			int wScreen, hScreen, xNew, yNew;
403			int flags = SWP_NOSIZE \| SWP_NOZORDER;
404
405			hwndParent = GetDesktopWindow ();
406			GetWindowRect (hwndChild, &rChild);
407			wChild = rChild.right - rChild.left;
408			hChild = rChild.bottom - rChild.top;
409
410			GetWindowRect (hwndParent, &rParent);
411			wParent = rParent.right - rParent.left;
412			hParent = rParent.bottom - rParent.top;
413
414			hdc = GetDC (hwndChild);
415			wScreen = GetDeviceCaps (hdc, HORZRES);
416			hScreen = GetDeviceCaps (hdc, VERTRES);
417			ReleaseDC (hwndChild, hdc);
418			xNew = rParent.left + ((wParent - wChild) /2);
419			if (xNew < 0)
420			xNew = 0;
421			else if ((xNew+wChild) > wScreen)
422			xNew = wScreen - wChild;
423			yNew = rParent.top + ((hParent - hChild) /2);
424			if (yNew < 0)
425			yNew = 0;
426			else if ((yNew+hChild) > hScreen)
427			yNew = hScreen - hChild;
428			if (style == HWND_TOPMOST \|\| style == HWND_NOTOPMOST)
429			flags = SWP_NOMOVE \| SWP_NOSIZE;
430			SetWindowPos (hwndChild, style? style : NULL, xNew, yNew, 0, 0, flags);
431			}
432
433
434			void
435			center_window (HWND hwndChild)
436			{
437			center_window2 (hwndChild, NULL);
438			}