private void Window_Closed(object sender, EventArgs e)
        {
            this._isRecording = false;
            //Close Mouse and Eye Timer
            Thread.Sleep(100);
            if (_MouseGazeTimer != null)
            {
                _MouseGazeTimer.Dispose();
            }

            //Close URL ReadWriter
            Thread.Sleep(100);
            if (_URLReadWriteThread != null)
            {
                _URLReadWriteThread.Abort();
            }

            //Close EyeTribeUC
            Thread.Sleep(100);
            if (_EyeDeviceUC != null)
            {
                if (_EyeDeviceUC.hasFixation())
                {
                    _EyeDeviceUC.OnFixationEvent -= OnGazeFixationEvent;
                }
                this._EyeDeviceUC.Dispose();
                this._EyeDeviceUC = null;
            }
        }
        /*********************  Eye Device  ***************************/
        private void cb_eyeDevice_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            //Get Eye Device Type
            string text = (sender as System.Windows.Controls.ComboBox).SelectedIndex.ToString();

            this._EyeDeviceType = (EyeDeviceType)Enum.Parse(typeof(EyeDeviceType), text);

            //Close eye device
            if (_EyeDeviceUC != null)
            {
                if (_EyeDeviceUC.hasFixation())
                {
                    _EyeDeviceUC.OnFixationEvent -= OnGazeFixationEvent;
                }
                this._EyeDeviceUC.Dispose();
                this._EyeDeviceUC = null;
            }

            //Do
            if (this._EyeDeviceType == EyeDeviceType.None)
            {
                this.g_eyedevice.Children.Clear();
                if (this.Height > 291)
                {
                    this.Height = this.Height - 260;
                }
                this.bt_start.IsEnabled = true;
            }
            else
            {
                //new eye device
                _EyeDeviceUC = new EyeDevice(_EyeDeviceType);
                if (_EyeDeviceUC.hasFixation())
                {
                    _EyeDeviceUC.OnFixationEvent += OnGazeFixationEvent;
                }

                this.bt_start.IsEnabled = false;
                if (this.Height <= 291)
                {
                    this.Height = this.Height + 260;
                }
                this.g_eyedevice.Children.Clear();
                this.g_eyedevice.Children.Add(_EyeDeviceUC);
            }
        }