fournij said:
Hi
I'm writing a MFC C++ application using Visual .NET. I'm using a Dual
Head video card with 2 monitors. I want to start my application in the
first monitor but open a dialog box in the second monitor. I tried to
set the X position of the dialog box greather thant the first screen
resolution, but the dialog box still appear on the first monitor.
Can you help me ?
Thanks
You'll get better feedback if you post this question in a MS or VC++
newsgroup.
Here's some related info:
You could use 'MonitorFromPoint()' or 'MonitorFromWindow()' to
determine which monitor it is shown on. See also
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/gdi/monitor_5isz.asp
("Positioning Objects on Multiple Display Monitors") and the associated
code sample at
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/gdi/monitor_9t0w.asp
("Positioning Objects on a Multiple Display Setup"):
#include <windows.h>
#include "multimon.h"
#define MONITOR_CENTER 0x0001 // center rect to monitor
#define MONITOR_CLIP 0x0000 // clip rect to monitor
#define MONITOR_WORKAREA 0x0002 // use monitor work area
#define MONITOR_AREA 0x0000 // use monitor entire area
//
// ClipOrCenterRectToMonitor
//
// The most common problem apps have when running on a
// multimonitor system is that they "clip" or "pin" windows
// based on the SM_CXSCREEN and SM_CYSCREEN system metrics.
// Because of app compatibility reasons these system metrics
// return the size of the primary monitor.
//
// This shows how you use the multi-monitor functions
// to do the same thing.
//
void ClipOrCenterRectToMonitor(LPRECT prc, UINT flags)
{
HMONITOR hMonitor;
MONITORINFO mi;
RECT rc;
int w = prc->right - prc->left;
int h = prc->bottom - prc->top;
//
// get the nearest monitor to the passed rect.
//
hMonitor = MonitorFromRect(prc, MONITOR_DEFAULTTONEAREST);
//
// get the work area or entire monitor rect.
//
mi.cbSize = sizeof(mi);
GetMonitorInfo(hMonitor, &mi);
if (flags & MONITOR_WORKAREA)
rc = mi.rcWork;
else
rc = mi.rcMonitor;
//
// center or clip the passed rect to the monitor rect
//
if (flags & MONITOR_CENTER)
{
prc->left = rc.left + (rc.right - rc.left - w) / 2;
prc->top = rc.top + (rc.bottom - rc.top - h) / 2;
prc->right = prc->left + w;
prc->bottom = prc->top + h;
}
else
{
prc->left = max(rc.left, min(rc.right-w, prc->left));
prc->top = max(rc.top, min(rc.bottom-h, prc->top));
prc->right = prc->left + w;
prc->bottom = prc->top + h;
}
}
void ClipOrCenterWindowToMonitor(HWND hwnd, UINT flags)
{
RECT rc;
GetWindowRect(hwnd, &rc);
ClipOrCenterRectToMonitor(&rc, flags);
SetWindowPos(hwnd, NULL, rc.left, rc.top, 0, 0, SWP_NOSIZE |
SWP_NOZORDER | SWP_NOACTIVATE);
}
