public static extern bool NET_DVR_GetAlarmOut(int lUserID, NET_DVR_ALARMOUTSTATUS lpAlarmOutState);
        /// <summary>
        /// 功能:获取报警输出
        /// </summary>
        /// <param name="userID">NET_DVR_Login ()的返回值.</param>
        /// <param name="bite">报警输出状态 0:无效 1:有效</param>
        /// <returns>返回值:TRUE 表示成功,FALSE 表示失败。</returns>
        public bool GetAlarmOut(int userID, byte[] bite)
        {
            bool b;

            NET_DVR_ALARMOUTSTATUS temp=new NET_DVR_ALARMOUTSTATUS();
            temp.OutPut = bite;

            b = NET_DVR_GetAlarmOut(userID,ref temp);

            return b;
        }