public SpaceNavigator()
        {
            try
            {
                _device = new Device();
                _sensor = _device.Sensor;
                _sensor.SensorInput += OnSensorInput;
               // keyboard.KeyDown += keyboard_KeyDown;
               // keyboard.KeyUp += keyboard_KeyUp;

                // Associate a configuration with this _device'
                _device.LoadPreferences("csMonitor");
                _device.Connect();

            }
            catch (COMException e)
            {
                Console.WriteLine("{0} Caught exception #1.", e);
                throw e;
            }
        }