public static extern bool GetMonitorInfo(IntPtr hmon, ref MonitorStructures.MonitorInfoEx mi);
public static extern bool GetMonitorTechnologyType( IntPtr hMonitor, ref MonitorStructures.MC_DISPLAY_TECHNOLOGY_TYPE pdtyDisplayTechnologyType);
public static extern bool EnumDisplayDevices(string lpDevice, uint iDevNum, ref MonitorStructures.DISPLAY_DEVICE lpDisplayDevice, uint dwFlags);