private void callback(HMessage msg)
 {
     Debug.WriteLine(">>>[Callback]<<< \n " + msg.ToString() + "\n");
     Update_TextBlock_UI(msgScreen, ">>>CallBack<<< \n" + msg.ToString());
 }
 void client_onMessage(HMessage message)
 {
     Debug.WriteLine(">>>client_onMessage: " + message.ToString());
     Update_TextBlock_UI(msgScreen, ">>>onMessage<<< \n" + message.ToString());
 }