static FXDatePicker()
{
DefaultStyleKeyProperty.OverrideMetadata(typeof(FXDatePicker), new FrameworkPropertyMetadata(typeof(FXDatePicker)));
EventManager.RegisterClassHandler(typeof(FXDatePicker), Keyboard.KeyDownEvent, new KeyEventHandler(KeyDownHandler), true);
EventManager.RegisterClassHandler(typeof(FXDatePicker), Mouse.MouseDownEvent, new MouseButtonEventHandler(OnMouseButtonDown), true);
}