public void send_monitor_to_client(string local_ip_address,string dest_ip_address,bool send_all_screen)

        {

            //IP地址及端口信息

            string command_string = "##IP:" + local_ip_address + "#IPEND###PORT:" + local_port.ToString() + "#PORTEND##";

            if (true == send_all_screen)

            {

                command_string = command_string + "#SENDALL#";

            }

            //添加控制客户机的命令串,在客户端寻找ORDER：与CMD_END##之间的串

            command_string = command_string+ "ORDER:" + Program .order_string   ;

            command_string = command_string + "#CMD_END##";

            UdpClient sender = new UdpClient();

            IPEndPoint endPoint = (new IPEndPoint(IPAddress.Parse(dest_ip_address), GlobalConsts.LOCAL_WAIT_PORT));

            try

            {

                byte[] bytes = Encoding.ASCII.GetBytes(command_string);

                sender.Send(bytes, bytes.Length, endPoint);

            }

            catch (Exception ex)

            {

                Console.WriteLine(ex.ToString());

            }

            finally

            {

                sender.Close();

            }

        }

        private void rev_data()

        {

            rev_data_udp = new UdpClient(new IPEndPoint(IPAddress.Any, local_port));

            IPEndPoint remoteHost = null;