public virtual void SetActive(Main screen, string tag)
{
border = new Border(new Size(1, 1), new Point(0, 0));
border.BackgroundColor = Color.Transparent;
border.ForegroundColor = Color.Transparent;
form = screen;
form.Map.AddRegion(border);
}
public virtual void SetInactive()
{
border.Dispose();
border = null;
}