public void ShowOverlay()
{
_overlayForm = new DarkTranslucentForm(Color.Black);
_overlayForm.Visible = true;
UpdateOverlay(new Point(0, 0));
}
public DockContentDragFilter(DarkDockPanel dockPanel)
{
_dockPanel = dockPanel;
_highlightForm = new DarkTranslucentForm(Colors.BlueSelection);
}