public Login() {
            InitializeComponent();
            XAPI_Client_digits();
            // XAPI_Adjunct_start();
            //XAPI_Adjunct_stop();
            //XAPI_Client_answer();
            //XAPI_Client_bdp_answer();
            //XAPI_Client_bdp_intrude();
            //XAPI_Client_bdp_register();
            // XAPI_Client_callb();
            //XAPI_Client_clear();
            //XAPI_Client_conference();
            //XAPI_Client_deflect();
            //XAPI_Client_digits();
            //XAPI_Client_hold();
            //XAPI_Client_mailbox();
            //XAPI_Client_newcall();
            //XAPI_Client_record_start();
            //XAPI_Client_record_stop();
            //XAPI_Client_resume();
            //XAPI_Client_retrieve();
            //XAPI_Client_start();
            //XAPI_Client_start_Thread();
            //XAPI_Client_stop();
            //XAPI_Client_suspend();
            //XAPI_Client_transfer();
            //XAPI_Client_transfer_undo();
            //XAPI_Cmdr_start();
            //XAPI_Cmdr_stop();
            //XAPI_Stack_initialize();
            XAPI_Client_digits();
            string TEST = "";
        }
        [DllImport("XapiDll.dll", CharSet = CharSet.Unicode)]
        //[DllImport("XapiDll.dll", CharSet = CharSet.Unicode,CallingConvention =CallingConvention.Cdecl)]
        public static extern void XAPI_Client_digits();
       // public static extern void XAPI_Adjunct_start();
       // public static extern void XAPI_Adjunct_stop();
        //public static extern void XAPI_Client_answer();
        //public static extern void XAPI_Client_bdp_answer();
        //public static extern void XAPI_Client_bdp_intrude();
       // public static extern void XAPI_Client_bdp_register();
        //public static extern void XAPI_Client_callb();
        //public static extern void XAPI_Client_clear();
        //public static extern void XAPI_Client_conference();
        //public static extern void XAPI_Client_deflect();
        //public static extern void XAPI_Client_digits();
        //public static extern void XAPI_Client_hold();
        //public static extern void XAPI_Client_mailbox();
        //public static extern void XAPI_Client_newcall();
        //public static extern void XAPI_Client_record_start();
        //public static extern void XAPI_Client_record_stop();
        //public static extern void XAPI_Client_resume();
        //public static extern void XAPI_Client_retrieve();
        //public static extern void XAPI_Client_start();
        //public static extern void XAPI_Client_start_Thread();
        //public static extern void XAPI_Client_stop();
        //public static extern void XAPI_Client_suspend();
        //public static extern void XAPI_Client_transfer();
        //public static extern void XAPI_Client_transfer_undo();
        //public static extern void XAPI_Cmdr_start();
        //public static extern void XAPI_Cmdr_stop();
        //public static extern void XAPI_Stack_initialize();
      //  public static extern void XAPI_Stack_release();