DllImport("gdi32.dll")]

public static extern bool GetDeviceGammaRamp(IntPtr hDC, ref RAMP lpRamp);

[DllImport("gdi32.dll")]

public static extern bool SetDeviceGammaRamp(IntPtr hDC, ref RAMP lpRamp);

 [DllImport("dxva2.dll")]

 public static extern bool GetNumberOfPhysicalMonitorsFromHMONITOR(IntPtr hMonitor, ref uint pdwNumberOfPhysicalMonitors);

 [DllImport("dxva2.dll")]

 public static extern bool GetPhysicalMonitorsFromHMONITOR(IntPtr hMonitor,

                 uint dwPhysicalMonitorArraySize, [Out] PhysicalMonitor[] pPhysicalMonitorArray);

 [DllImport("dxva2.dll")]

 public static extern bool DestroyPhysicalMonitors(uint dwPhysicalMonitorArraySize,

                 [Out] PhysicalMonitor[] pPhysicalMonitorArray);

 [DllImport("dxva2.dll")]

 public static extern bool GetMonitorTechnologyType(IntPtr hMonitor,

                 ref McDisplayTechnologyType pdtyDisplayTechnologyType);

 [DllImport("dxva2.dll")]

 public static extern bool GetMonitorCapabilities(IntPtr hMonitor, ref uint pdwMonitorCapabilities,

                 ref uint pdwSupportedColorTemperatures);

 [DllImport("dxva2.dll")]

 public static extern bool SetMonitorBrightness(IntPtr hMonitor, short brightness);

 [DllImport("dxva2.dll")]

 public static extern bool SetMonitorContrast(IntPtr hMonitor, short contrast);

 [DllImport("dxva2.dll")]

 public static extern bool GetMonitorBrightness(IntPtr hMonitor, ref short pdwMinimumBrightness,

                 ref short pdwCurrentBrightness, ref short pdwMaximumBrightness);

 [DllImport("dxva2.dll")]

 public static extern bool GetMonitorContrast(IntPtr hMonitor, ref short pwdMinimumContrast,

                 ref short pwdCurrentContrast, ref short pwdMaximumContrast);

DataHandlerClass _cls = new DataHandlerClass();

_CUI_COLOR_DEVICES _screenModel = default(_CUI_COLOR_DEVICES);

public AjustScreenByIgfxDHLib()

{

    CUI_SUPPORTED_CONFIG cui_SUPPORTED_CONFIG = default(CUI_SUPPORTED_CONFIG);

    uint num = _cls.get_SupportedConfig(ref cui_SUPPORTED_CONFIG);

    var id = cui_SUPPORTED_CONFIG.DeviceConfig[0].DispDev[0];

    uint[] array = new uint[3];

    var a = _cls.get_GetDeviceList(id, array);

    _screenModel.ulDevices = array[0];

    _screenModel.Device = new _CUI_COLOR_INFO[3];

    _screenModel.Device[0].Brightness.color = _COLOR_TYPE.NumColors;

    _screenModel.Device[0].Contrast.color = _COLOR_TYPE.NumColors;

    _screenModel.Device[0].Gamma.color = _COLOR_TYPE.NumColors;

    _screenModel.Command = _CUI_COLOR_COMMAND.GET_COLOR;

    _cls.get_color(_screenModel.ulDevices, ref _screenModel);

}