public static extern void cdo_start_local_video( cdo_string_rclbck_t rclbck, CDOH handle, IntPtr opaque);
public static extern void cdo_get_version( cdo_string_rclbck_t resultHandler, CDOH handle, IntPtr opaque);
public static extern void cdo_get_video_capture_device( cdo_string_rclbck_t rclbck, CDOH handle, IntPtr opaque);
public static extern void cdo_get_audio_output_device( cdo_string_rclbck_t rclbck, CDOH handle, IntPtr opaque);