private static string changeSettings(DisplaySettings set, DisplayManager.DisplayDevice dev, bool prim)
{
return DisplayManager.SetDisplaySettings(set, dev, prim);
}
/// <summary>
/// Changes the current display settings with the new settings provided. May throw InvalidOperationException if failed. Check the exception message for more details.
/// </summary>
/// <param name="set">The new settings.</param>
/// <remarks>
/// Internally calls ChangeDisplaySettings() native function.
/// </remarks>
public static string SetDisplaySettings(DisplaySettings set, DisplayDevice dev, bool primary)
{
SafeNativeMethods.DEVMODE mode = new SafeNativeMethods.DEVMODE();
mode.dmPelsWidth = (uint)set.Width;
mode.dmPelsHeight = (uint)set.Height;
mode.dmDisplayOrientation = (uint)set.Orientation;
mode.dmBitsPerPel = (uint)set.BitCount;
mode.dmDisplayFrequency = (uint)set.Frequency;
if (primary)
{
mode.dmPosition.x = 0;
mode.dmPosition.y = 0;
}
else
{
mode.dmPosition.x = -set.Width -1;
mode.dmPosition.y = 0;
}
uint flags;
if (primary)
flags = (uint)(CDSFlags.CDS_RESET | CDSFlags.CDS_UPDATEREGISTRY | CDSFlags.CDS_SET_PRIMARY );
else
flags = (uint)(CDSFlags.CDS_RESET | CDSFlags.CDS_UPDATEREGISTRY);
mode.dmFields = (uint)(SafeNativeMethods.DM.Position | SafeNativeMethods.DM.PelsHeight | SafeNativeMethods.DM.PelsWidth|
SafeNativeMethods.DM.DisplayFrequency | SafeNativeMethods.DM.DisplayOrientation|
SafeNativeMethods.DM.BitsPerPixel);
mode.dmSize = (ushort)Marshal.SizeOf(mode);
DisplayChangeResult result = (DisplayChangeResult)
SafeNativeMethods.ChangeDisplaySettingsEx(dev.DeviceName, ref mode, IntPtr.Zero, flags, IntPtr.Zero);
string msg = "Successfully changed the settings!";
switch (result)
{
case DisplayChangeResult.BadDualView:
msg = Properties.Resources.InvalidOperation_Disp_Change_BadDualView;
break;
case DisplayChangeResult.BadParam:
msg = Properties.Resources.InvalidOperation_Disp_Change_BadParam;
break;
case DisplayChangeResult.BadFlags:
msg = Properties.Resources.InvalidOperation_Disp_Change_BadFlags;
break;
case DisplayChangeResult.NotUpdated:
msg = Properties.Resources.InvalidOperation_Disp_Change_NotUpdated;
break;
case DisplayChangeResult.BadMode:
msg = Properties.Resources.InvalidOperation_Disp_Change_BadMode;
break;
case DisplayChangeResult.Failed:
msg = Properties.Resources.InvalidOperation_Disp_Change_Failed;
break;
case DisplayChangeResult.Restart:
msg = Properties.Resources.InvalidOperation_Disp_Change_Restart;
break;
}
return msg;
}
