Le Giap 2009-09-29 15:53
Hi,
I have a problem.
I have two monitors. When i plug-out a monitor, applications on that monitor wil be disable.
But, i cant not catching window message when i unplug monitor. I using VS.2003.
I catch on WM_DEVICECHANGE message. It always return DISPLAY_DEVICE_ATTACHED_TO_DESKTOP.
Can you help fix solution.
My code
DISPLAY_DEVICE dd;
ZeroMemory(&dd, sizeof(dd));
dd.cb = sizeof(dd);
EnumDisplayDevices(0, 1, &dd, 0);
if (!(dd.StateFlags & DISPLAY_DEVICE_MIRRORING_DRIVER)) {
DISPLAY_DEVICE ddMon;
ZeroMemory(&ddMon, sizeof(ddMon));
ddMon.cb = sizeof(ddMon);
DWORD devMon = 0;
while (EnumDisplayDevices(dd.DeviceName, devMon, &ddMon, 0))
{
if (ddMon.StateFlags & DISPLAY_DEVICE_ACTIVE)
break;
devMon++;
}
if (!*ddMon.DeviceString)
{
EnumDisplayDevices(dd.DeviceName, 0, &ddMon, 0);
if (!*ddMon.DeviceString)
lstrcpy(ddMon.DeviceString, _T("Default Monitor"));
}
if(!(ddMon.StateFlags & DISPLAY_DEVICE_ATTACHED_TO_DESKTOP))
{
this->ShowWindow(SW_HIDE);
}
else
{
this->ShowWindow(SW_SHOW);
}
}
return CDialog::OnDeviceChange(nEventType,dwData);
}
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