public static TbkReturn open_port(string portName, int baudrate)
        {
            TbkReturn ret = (TbkReturn)TransbankWrapPINVOKE.open_port(portName, baudrate);

            return(ret);
        }
        public static TbkReturn set_normal_mode()
        {
            TbkReturn ret = (TbkReturn)TransbankWrapPINVOKE.set_normal_mode();

            return(ret);
        }
        public static TbkReturn close_port()
        {
            TbkReturn ret = (TbkReturn)TransbankWrapPINVOKE.close_port();

            return(ret);
        }
        public static TbkReturn poll()
        {
            TbkReturn ret = (TbkReturn)TransbankWrapPINVOKE.poll();

            return(ret);
        }