/// <summary>
/// A private helper method used to retrieve current display settings as a DEVMODE object.
/// </summary>
/// <remarks>
/// Internally calls EnumDisplaySettings() native function with the value ENUM_CURRENT_SETTINGS (-1) to retrieve the current settings.
/// </remarks>
private static SafeNativeMethods.DEVMODE GetDeviceMode(DisplayDevice dev, bool def)
{
SafeNativeMethods.DEVMODE mode = new SafeNativeMethods.DEVMODE();
mode.Initialize();
if (def)
{
if (SafeNativeMethods.EnumDisplaySettings(null, SafeNativeMethods.ENUM_CURRENT_SETTINGS, ref mode))
return mode;
else
//throw new InvalidOperationException(GetLastError());
throw new InvalidOperationException("Hello");
}
else
{
//if (SafeNativeMethods.EnumDisplaySettings(dev.DeviceName, 0, ref mode))
if(SafeNativeMethods.EnumDisplaySettingsEx(dev.DeviceName, -2, ref mode, (uint)CDSFlags.CDS_RESET) )
return mode;
else
//throw new InvalidOperationException(GetLastError());
throw new InvalidOperationException("Hello1");
}
}
/// <summary>
/// Enumerates all supported display modes.
/// </summary>
/// <remarks>
/// Internally calls EnumDisplaySettings() native function.
/// Because of the nature of EnumDisplaySettings() it calls it many times and uses the <code>yield return</code> statement to simulate an enumerator.
/// </remarks>
public static IEnumerator<DisplaySettings> GetModesEnumerator(string devName)
{
SafeNativeMethods.DEVMODE mode = new SafeNativeMethods.DEVMODE();
mode.Initialize();
// mode.dmDeviceName = devName;
int idx = 0;
while (SafeNativeMethods.EnumDisplaySettingsEx(devName, idx, ref mode, 0))
{
yield return CreateDisplaySettingsObject(idx++, mode);
}
}
