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"


extern "C" void _SHFree (void *p);

/*
 * 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);
        _SHFree (il);
        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	/* 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	extern "C" void _SHFree (void *p);
37
38	/*
39	* The the text of a menu item.
40	*/
41	void
42	set_menu_text (HMENU menu, int m_uid, const char *text)
43	{
44	MENUITEMINFO mii;
45	char menu_text[80];
46
47	memset (&mii, 0, sizeof (mii));
48	mii.cbSize = sizeof (mii);
49	mii.fMask = MIIM_TYPE;
50	mii.dwTypeData = menu_text;
51	mii.cch = sizeof (menu_text);
52	GetMenuItemInfo (menu, m_uid, FALSE, &mii);
53
54	memset (&mii, 0, sizeof mii);
55	mii.cbSize = sizeof mii;
56	mii.fMask = MIIM_TYPE;
57	mii.fType = MFT_STRING;
58	mii.dwTypeData = (char *) text;
59	SetMenuItemInfo (menu, m_uid, FALSE, &mii);
60	} /* set_menu_text */
61
62
63	void
64	set_menu_state (HMENU menu, int m_uid, int state)
65	{
66	MENUITEMINFO mii;
67
68	memset( &mii, 0, sizeof (mii) );
69	mii.cbSize = sizeof (mii);
70	mii.fMask = MIIM_STATE;
71	mii.fState = state;
72	SetMenuItemInfo (menu, m_uid, FALSE, &mii);
73	} /* set_menu_state */
74
75
76
77	const char *
78	get_filename_dlg (HWND hwnd, int id, const char * title,
79	const char * filter, const char * name)
80	{
81	static char file[512] = "";
82	OPENFILENAME open;
83
84	if (name && strlen (name) < (sizeof (file)-1))
85	strcpy (file, name);
86	else
87	memset (file, 0, sizeof (file));
88	if (!filter)
89	filter = _("All Files (.)\0.");
90	memset (&open, 0, sizeof (open));
91	open.lStructSize = sizeof (OPENFILENAME);
92	open.hInstance = glob_hinst;
93	open.lpstrTitle = title;
94	open.lpstrFilter = filter;
95	open.hwndOwner = hwnd;
96	open.lpstrFile = file;
97	open.nMaxFile = sizeof (file) - 1;
98	open.Flags = 0;
99
100	if (id == 0 && GetOpenFileName (&open))
101	return open.lpstrFile;
102	else if (id == 1 && GetSaveFileName (&open))
103	return open.lpstrFile;
104
105	return NULL;
106	} /* get_filename_dlg */
107
108
109	const char *
110	get_folder_dlg (HWND hwnd, const char * title, const char * name)
111	{
112	static char folder[MAX_PATH] = "";
113	BROWSEINFO bi;
114	ITEMIDLIST * il;
115
116	memset (&bi, 0, sizeof (bi));
117	bi.hwndOwner = hwnd;
118	if (title)
119	bi.lpszTitle = title;
120	if (name && strlen (name) < MAX_PATH-1)
121	strcpy (folder, name);
122	else
123	memset (folder, 0, sizeof (folder));
124	il = SHBrowseForFolder (&bi);
125	if (il) {
126	SHGetPathFromIDList (il, folder);
127	_SHFree (il);
128	return folder;
129	}
130	return NULL;
131	}
132
133
134	char*
135	get_clip_text (HWND hwnd)
136	{
137	HANDLE clipmem;
138	char cliptxt, p;
139	int len;
140
141	if (OpenClipboard (hwnd) == FALSE)
142	return NULL;
143	clipmem = GetClipboardData (CF_TEXT);
144	if (clipmem == NULL) {
145	p = NULL;
146	goto leave;
147	}
148	cliptxt = (char *) GlobalLock (clipmem);
149	if (cliptxt == NULL) {
150	p = NULL;
151	goto leave;
152	}
153
154	len = strlen (cliptxt);
155	p = new char[len + 1];
156	if (!p)
157	BUG (NULL);
158	memcpy (p, cliptxt, len);
159	p[len] = '\0';
160	GlobalUnlock (clipmem);
161
162	leave:
163	CloseClipboard ();
164	return p;
165	} /* get_clip_text */
166
167
168	int
169	set_clip_text (HWND hwnd, const char *text, int nbytes)
170	{
171	HANDLE clipmem;
172	int rc = 0;
173	char *p;
174
175	if (OpenClipboard (hwnd) == FALSE)
176	return WPTERR_CLIP_OPEN;
177	EmptyClipboard ();
178
179	clipmem = GlobalAlloc (GHND, nbytes + 1);
180	if (clipmem == NULL)
181	BUG (NULL);
182	p = (char *) GlobalLock (clipmem);
183	if (p == NULL) {
184	rc = WPTERR_GENERAL;;
185	goto leave;
186	}
187	memcpy (p, text, nbytes);
188	p[nbytes] = '\0';
189
190	GlobalUnlock (clipmem);
191	SetClipboardData (CF_TEXT, clipmem);
192
193	leave:
194	CloseClipboard ();
195	return rc;
196	} /* set_clip_text */
197
198
199	int
200	set_clip_text2 (HWND hwnd, const char *text, int nbytes, int head_foot)
201	{
202	char p, new_text;
203
204	p = get_clip_text (hwnd);
205	if (!p)
206	return WPTERR_CLIP_GET;
207	new_text = new char [strlen (p)+strlen (text)+8];
208	if (!new_text)
209	BUG (0);
210	if (head_foot == 0)
211	sprintf (new_text, "%s\r\n%s\r\n\r\n", text, p);
212	else
213	sprintf (new_text, "%s\n%s\n\n", p, text);
214	set_clip_text (hwnd, new_text, strlen (new_text)+1);
215	free_if_alloc (p);
216	free_if_alloc (new_text);
217	return 0;
218	}
219
220
221	char*
222	make_filename( const char path, const char file, const char *ext )
223	{
224	char *p;
225	size_t size = 0;
226
227	if( path && *path )
228	size += strlen( path );
229	if( file && *file )
230	size += strlen( file );
231	if( ext && *ext )
232	size += strlen( ext );
233	p = new char[size + 4];
234	memset( p, 0, size );
235	if( path ) {
236	strcat( p, path );
237	if( path[strlen( path ) -1] != '\\' )
238	strcat( p, "\\" );
239	}
240	if( file )
241	strcat( p, file );
242	if( ext ) {
243	strcat( p, "." );
244	strcat( p, ext );
245	}
246	return p;
247	} /* make_filename */
248
249
250	/* return 0 if it exists, otherwise >0. */
251	int
252	file_exist_check (const char * fname)
253	{
254	HANDLE fh;
255
256	fh = CreateFile( fname, GENERIC_READ, FILE_SHARE_READ,
257	NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL );
258	if( fh == INVALID_HANDLE_VALUE )
259	return WPTERR_FILE_EXIST;
260	CloseHandle( fh );
261	return 0;
262	} /* file_exist_check */
263
264
265	int
266	dir_exist_check( const char *dir )
267	{
268	struct stat statbuf;
269
270	if( stat( dir, &statbuf ) == -1 )
271	return WPTERR_GENERAL;
272	if( statbuf.st_mode & _S_IFDIR )
273	return 0;
274	return WPTERR_GENERAL;
275	} /* dir_exist_check */
276
277
278	size_t
279	get_file_size( const char *fname )
280	{
281	size_t fsize;
282	HANDLE fh;
283
284	fh = CreateFile( fname, GENERIC_READ, FILE_SHARE_READ,
285	NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL );
286	if( fh == INVALID_HANDLE_VALUE )
287	return 0;
288	fsize = GetFileSize( fh, NULL );
289	if( fsize == 0xFFFFFFFF )
290	fsize = 0;
291	CloseHandle( fh );
292	return fsize;
293	} /* get_file_size */
294
295
296	int
297	init_file_lock( LOCK ctx, const char file )
298	{
299
300	ctx->size = get_file_size( file );
301	ctx->file = m_strdup( file );
302	ctx->fh = CreateFile( file, GENERIC_READ, FILE_SHARE_READ, NULL,
303	OPEN_ALWAYS, 0, NULL );
304	if( ctx->fh == INVALID_HANDLE_VALUE )
305	return WPTERR_GENERAL;
306	if( LockFile( ctx->fh, 0, 0, ctx->size, 0 ) == FALSE ) {
307	CloseHandle( ctx->fh );
308	ctx->fh = INVALID_HANDLE_VALUE;
309	ctx->size = 0;
310	free( ctx->file );
311	return WPTERR_GENERAL;
312	}
313	return 0;
314	} /* init_file_lock */
315
316
317	void
318	release_file_lock( LOCK *ctx )
319	{
320	free_if_alloc( ctx->file );
321	ctx->file = NULL;
322	ctx->size = 0;
323	CloseHandle( ctx->fh );
324	} /* release_file_lock */
325
326
327	int
328	dialog_box_param( HINSTANCE hinst, LPCTSTR name, HWND parent, DLGPROC fnc,
329	LPARAM param, LPCTSTR title, int title_id )
330	{
331	#ifndef LANG_DE
332	if( FindWindowEx( GetDesktopWindow(), NULL, NULL, title ) )
333	return -1;
334	#else
335	char strdesc[256];
336	LoadString( glob_hinst, title_id, strdesc, sizeof (strdesc) -1 );
337	if( FindWindowEx( GetDesktopWindow(), NULL, NULL, strdesc ) )
338	return -1;
339	#endif
340
341	return DialogBoxParam( hinst, name, parent, fnc, param );
342	} /* dialog_box_param */
343
344
345	int
346	msg_box( HWND hwnd, const char text, const char title, int mode )
347	{
348	mode \|= MB_SETFOREGROUND;
349	mode \|= MB_TASKMODAL;
350	mode \|= MB_TOPMOST;
351	return MessageBox(hwnd, text, title, mode);
352	} /* msg_box */
353
354
355	void
356	set_active_window( HWND dlg )
357	{
358	activ_hwnd = dlg;
359	} /* set_active_window */
360
361	void
362	reset_active_window( void )
363	{
364	activ_hwnd = NULL;
365	} /* reset_active_window */
366
367
368	static DWORD CALLBACK
369	reminder_thread( void *ctx )
370	{
371	reminder_ctx_s c = (reminder_ctx_s )ctx;
372
373	Sleep( c->msecs );
374	SetForegroundWindow( activ_hwnd );
375
376	return 0;
377	} /* reminder_thread */
378
379	HANDLE
380	window_reminder( struct reminder_ctx_s *ctx )
381	{
382	DWORD tid = 0;
383
384	return CreateThread( NULL, 0, reminder_thread, ctx, 0, &tid );
385	} /* window_reminder */
386
387
388	char *
389	m_strdup (const char *str)
390	{
391	char * p = new char[strlen (str) + 1];
392	if (p)
393	strcpy (p, str);
394	return p;
395	} /* m_strdup */
396
397
398	void
399	center_window2 (HWND hwndChild, HWND style)
400	{
401	HWND hwndParent;
402	RECT rChild, rParent;
403	HDC hdc;
404	int wChild, hChild, wParent, hParent;
405	int wScreen, hScreen, xNew, yNew;
406	int flags = SWP_NOSIZE \| SWP_NOZORDER;
407
408	hwndParent = GetDesktopWindow ();
409	GetWindowRect (hwndChild, &rChild);
410	wChild = rChild.right - rChild.left;
411	hChild = rChild.bottom - rChild.top;
412
413	GetWindowRect (hwndParent, &rParent);
414	wParent = rParent.right - rParent.left;
415	hParent = rParent.bottom - rParent.top;
416
417	hdc = GetDC (hwndChild);
418	wScreen = GetDeviceCaps (hdc, HORZRES);
419	hScreen = GetDeviceCaps (hdc, VERTRES);
420	ReleaseDC (hwndChild, hdc);
421	xNew = rParent.left + ((wParent - wChild) /2);
422	if (xNew < 0)
423	xNew = 0;
424	else if ((xNew+wChild) > wScreen)
425	xNew = wScreen - wChild;
426	yNew = rParent.top + ((hParent - hChild) /2);
427	if (yNew < 0)
428	yNew = 0;
429	else if ((yNew+hChild) > hScreen)
430	yNew = hScreen - hChild;
431	if (style == HWND_TOPMOST \|\| style == HWND_NOTOPMOST)
432	flags = SWP_NOMOVE \| SWP_NOSIZE;
433	SetWindowPos (hwndChild, style? style : NULL, xNew, yNew, 0, 0, flags);
434	}
435
436
437	void
438	center_window (HWND hwndChild)
439	{
440	center_window2 (hwndChild, NULL);
441	}