// NOTE: this function returns True if the display settings can be set, False otherwise
// NOTE: this _might_ let us detect if a display change requires a reboot (although we don't yet return a result indicating that reality)
public static Boolean TestDisplaySettings(String displayAdapterName, DisplaySettings settings)
{
var displayAdapterNameAsCharArray = ConvertStringToNullTerminatedCharArray(displayAdapterName);
var devmode = settings.devmode;
var result = WindowsApi.ChangeDisplaySettingsEx(displayAdapterNameAsCharArray, ref devmode, IntPtr.Zero, (UInt32)WindowsApi.ChangeDisplaySettingsFlags.CDS_TEST, IntPtr.Zero);
switch (result)
{
case WindowsApi.DISP_CHANGE_RESULT.DISP_CHANGE_SUCCESSFUL:
return(true);
//case WindowsApi.DISP_CHANGE_RESULT.DISP_CHANGE_RESTART:
default:
return(false);
}
}
// NOTE: this function throws an exception if the settings could not be set successfully
public static void SetCurrentDisplaySettings(String displayAdapterName, DisplaySettings settings)
{
/* OPTIONAL FLAGS:
* CDS_GLOBAL | CDS_UPDATEREGISTRY // save the updated resolution for all users
* CDS_RESET // update the settings even if they're the same as the current settings
* CDS_SET_PRIMARY // make this display adapter the primary display adapter
* CDS_TEST // tests if the change would be valid [NOTE: this _might_ let us detect if a display change requires a reboot]
* CDS_UPDATEREGISTRY // save the display change in the system registry (for the user, unless also using CDS_GLOBAL)
* CDS_DISABLE_UNSAFE_MODES // prohibits us from accidentally using unsafe display modes
*/
var displayAdapterNameAsCharArray = ConvertStringToNullTerminatedCharArray(displayAdapterName);
var devmode = settings.devmode;
var result = WindowsApi.ChangeDisplaySettingsEx(displayAdapterNameAsCharArray, ref devmode, IntPtr.Zero, 0, IntPtr.Zero);
switch (result)
{
case WindowsApi.DISP_CHANGE_RESULT.DISP_CHANGE_SUCCESSFUL:
return;
default:
throw new Exception("Could not change screen settings; result: " + result);
}
}
