protected override void OnDragOver(DragEventArgs drgevent)
{
Point pt = this.PointToClient(Cursor.Position);//new Point(drgevent.X, drgevent.Y));
PointF lDragPosition = this.ClientToDoc(new Point(pt.X,pt.Y));
foreach (MindFusion.Diagramming.DiagramNode iNode in this.Diagram.Nodes)
{
if (iNode.Bounds.Contains(lDragPosition))
iNode.Brush = new MindFusion.Drawing.SolidBrush(Color.Yellow);
else
iNode.Brush = new MindFusion.Drawing.SolidBrush(Color.White);
}
base.OnDragOver(drgevent);
}