Not sure how you are doing your D&D, but if you are using the Control
D&D events, one simple thing you could do is to move the selection are
you move the drop as below. To display a little line at the insertion
point would require more work.

void listBox2_DragOver(object sender, DragEventArgs e)
   {
       Point pt = this.listBox2.PointToClient(new Point(e.X, e.Y));
       int index = this.listBox2.IndexFromPoint(pt);
       if (index > -1 && index < list2.Count)
           this.listBox2.SelectedIndex = index;
   }
===============
Clay Burch
Syncfusion, Inc.