private static void SetupDevice(string device, int width, int height, int x = 0, int y = 0)
{
ChangeDisplaySettingsFlags flags = ChangeDisplaySettingsFlags.CDS_NONE;
if (x == 0 && y == 0)
{
flags = ChangeDisplaySettingsFlags.CDS_SET_PRIMARY;
}
DEVMODE screenMode = new DEVMODE();
screenMode.dmSize = Convert.ToInt16(Marshal.SizeOf(screenMode));
screenMode.dmDriverExtra = 0;
screenMode.dmFields = DM.Position | DM.PelsHeight | DM.PelsWidth;
screenMode.dmPelsWidth = width;
screenMode.dmPelsHeight = height;
POINTL deleteion;
deleteion.x = x;
deleteion.y = y;
screenMode.dmPosition = deleteion;
ChangeDisplaySettings(device, screenMode, flags);
}
public static extern ChangeDisplaySettingsExResults ChangeDisplaySettingsEx(
string deviceName,
IntPtr devModePointer,
IntPtr handler,
ChangeDisplaySettingsFlags flags,
IntPtr param
);
public static extern ChangeDisplaySettingsExResult ChangeDisplaySettingsEx(
string deviceName,
ref DeviceMode devMode,
IntPtr handler,
ChangeDisplaySettingsFlags flags,
IntPtr param
);
private static void ChangeDisplaySettings(string device, DEVMODE mode, ChangeDisplaySettingsFlags flags = ChangeDisplaySettingsFlags.CDS_NONE)
{
ChangeDisplaySettingsEx(device,
ref mode,
IntPtr.Zero,
flags | ChangeDisplaySettingsFlags.CDS_UPDATEREGISTRY | ChangeDisplaySettingsFlags.CDS_NORESET,
IntPtr.Zero);
}
//todo: CDS_UPDATEREGISTRY
// Change the settings to the values of the DEVMODE passed
public string ChangeSettings(DISPLAY_DEVICE a_dev, DevMode devmode, bool bSetPrimary)
{
string errorMessage = "";
ChangeDisplaySettingsFlags flags = new ChangeDisplaySettingsFlags();
flags = ChangeDisplaySettingsFlags.CDS_UPDATEREGISTRY | ChangeDisplaySettingsFlags.CDS_GLOBAL;
ReturnCodes iRet = NativeMethods.ChangeDisplaySettingsEx(a_dev.DeviceName, ref devmode, IntPtr.Zero, flags, IntPtr.Zero);
//same again, but with PRIMARY
if (bSetPrimary && iRet == ReturnCodes.DISP_CHANGE_SUCCESSFUL)
{
SetAsPrimaryMonitor(a_dev);
}//if primary
if (iRet == ReturnCodes.DISP_CHANGE_SUCCESSFUL)
{
AdjustMonitorPosition(a_dev);
}
switch (iRet)
{
case ReturnCodes.DISP_CHANGE_SUCCESSFUL:
break;
case ReturnCodes.DISP_CHANGE_RESTART:
errorMessage = "Please restart your system";
break;
case ReturnCodes.DISP_CHANGE_FAILED:
errorMessage = "ChangeDisplaySettigns API failed";
break;
case ReturnCodes.DISP_CHANGE_BADDUALVIEW:
errorMessage = "The settings change was unsuccessful because system is DualView capable.";
break;
case ReturnCodes.DISP_CHANGE_BADFLAGS:
errorMessage = "An invalid set of flags was passed in.";
break;
case ReturnCodes.DISP_CHANGE_BADPARAM:
errorMessage = "An invalid parameter was passed in. This can include an invalid flag or combination of flags.";
break;
case ReturnCodes.DISP_CHANGE_NOTUPDATED:
errorMessage = "Unable to write settings to the registry.";
break;
default:
errorMessage = "Unknown return value from ChangeDisplaySettings API";
break;
}
return(errorMessage);
}
[DllImport("user32.dll", CharSet = CharSet.Ansi)] //CallingConvention = CallingConvention.Cdecl
public static extern ReturnCodes ChangeDisplaySettingsEx(string lpszDeviceName, ref DevMode lpDevMode, IntPtr hwnd, ChangeDisplaySettingsFlags dwFlags, IntPtr lParam);
public static extern ChangeDisplaySettingsExResults ChangeDisplaySettingsEx(
string lpszDeviceName,
IntPtr lpDevMode,
IntPtr hwnd,
ChangeDisplaySettingsFlags dwflags,
IntPtr lParam);
private static extern DispChange ChangeDisplaySettingsEx(
string lpszDeviceName,
ref Devmode lpDevMode,
IntPtr hwnd,
ChangeDisplaySettingsFlags dwflags,
IntPtr lParam);
public static extern int ChangeDisplaySettingsEx(string lpszDeviceName, ref DEVMODE lpDevMode, IntPtr hwnd, ChangeDisplaySettingsFlags dwflags, IntPtr lParam);
public static extern DISP_CHANGE ChangeDisplaySettingsEx(string lpszDeviceName, ref Devmode lpDevMode,
IntPtr hwnd, ChangeDisplaySettingsFlags dwflags, IntPtr lParam);
private static extern DispChange ChangeDisplaySettingsEx(
string lpszDeviceName,
ref Devmode lpDevMode,
IntPtr hwnd,
ChangeDisplaySettingsFlags dwflags,
IntPtr lParam);
public static extern DisplayChange ChangeDisplaySettingsEx([In, MarshalAs(UnmanagedType.LPTStr)] string lpszDeviceName, [In] IntPtr lpDevMode, IntPtr hWnd,
[In] ChangeDisplaySettingsFlags dwflags, [In] IntPtr lParam);
public static extern DisplayChange ChangeDisplaySettings([In] IntPtr devMode, [In] ChangeDisplaySettingsFlags flags);
static extern DISP_CHANGE ChangeDisplaySettingsExNoop(string lpszDeviceName, IntPtr noop, IntPtr hwnd, ChangeDisplaySettingsFlags dwflags, IntPtr lParam);
public static extern int ChangeDisplaySettingsEx(string lpszDeviceName, ref DEVMODE lpDevMode, IntPtr hwnd, ChangeDisplaySettingsFlags dwflags, IntPtr lParam);
// A signature for ChangeDisplaySettingsEx with a DEVMODE struct as the second parameter won't allow you to pass in IntPtr.Zero, so create an overload public static extern DISP_CHANGE ChangeDisplaySettingsEx(string lpszDeviceName, IntPtr lpDevMode, IntPtr hwnd, ChangeDisplaySettingsFlags dwflags, IntPtr lParam);
internal static extern DisplayChangeResult ChangeDisplaySettings(ref DEVMODE lpDevMode, ChangeDisplaySettingsFlags dwFlags);
