public static extern emDSCameraStatus CameraGetLightFrequency(int m_iCameraID, ref emDSLightFrequency pemFrequency);
public static extern emDSCameraStatus CameraSetLightFrequency(int m_iCameraID, emDSLightFrequency emFrequency);
public static extern emDSCameraStatus CameraGetLightFrequency(int m_iCameraID, ref emDSLightFrequency pemFrequency);
public static extern emDSCameraStatus CameraSetLightFrequency(int m_iCameraID, emDSLightFrequency emFrequency);