private void OnContentChanged(object sender, RoutedEventArgs e)
 {
     VncLibControl.VncLibUserCallback = VncLibUserCallback;
     VncLibControl.Connect();
     VncLibControl.UpdateScreen();
     VncLibControl.EnableMouseCapturing();
 }
 private void MainWindow_OnClosing(object sender, CancelEventArgs e)
 {
     VncLibControl.Disconnect();
 }