System.Windows.Forms.CustomTabControl.OnDragOver C# (CSharp) Method

        protected override void OnDragOver(DragEventArgs drgevent)
        {
            base.OnDragOver(drgevent);

              	        if (drgevent.Data.GetDataPresent(typeof(TabPage))){
              				drgevent.Effect = DragDropEffects.Move;
              			} else {
              				drgevent.Effect = DragDropEffects.None;
              		    }
        }