Creating a keyboard shortcuts for Lightswitch application

Keyboard Shortcut

 partial void Tickets_Created()
{
    this.FindControl("ScreenLayout").ControlAvailable += Tickets_ControlAvailable;

}

void Tickets_ControlAvailable(object sender, Microsoft.LightSwitch.Presentation.ControlAvailableEventArgs e)
{
    var screenLayout = e.Control as System.Windows.Controls.Grid;
    if (screenLayout == null) return;

    screenLayout.KeyUp += ScreenLayoutKeyUp;

}

void ScreenLayoutKeyUp(object sender, KeyEventArgs e)
{
    if (e.Key == Key.A && 
        (Keyboard.Modifiers & (ModifierKeys.Control | ModifierKeys.Shift)) == 
        (ModifierKeys.Control | ModifierKeys.Shift))
    {
        this.Details.Dispatcher.BeginInvoke(AddTicket_Execute);
    }

   if (e.Key == Key.Tab && (Keyboard.Modifiers & ModifierKeys.Control) == ModifierKeys.Control)
   {
      //This is just a sample
      MessageBox.Show("CTRL + TAB trapped");
   }

}