private void ActivateDropDownMenu(object sender)
{
DropDownMenu.Left = this.Left;
DropDownMenu.Top = this.Top + 1;
DropDownMenu.Layout();
if (AnchorRight)
{
DropDownMenu.Left = this.Right - DropDownMenu.Width;
DropDownMenu.Layout();
}
DropDownMenu.Activate((Screen)sender, this);
}