private void layoutControl1_MouseDown(object sender, MouseEventArgs e)
        {
            LayoutControl         lc          = sender as LayoutControl;
            BaseLayoutItemHitInfo hi          = lc.CalcHitInfo(e.Location);
            LayoutControlItem     currentItem = hi.Item as LayoutControlItem;

            if (currentItem == null || hi.HitType != LayoutItemHitTest.TextArea)
            {
                return;
            }
            if (currentItem.Control != null)
            {
                currentItem.Control.Focus();
            }
        }