AutoCAD .NET :: Modeless Dialog / Insertion Point

I have modeless dialog. On dialog I have button on which user clicks, when he wants to pick insertion point. Problem is when I exit dialog the command line is still in command GetPoint (doesn't show usual Command.My code at the moment is:

           // this.Visible = false;
            AppServ.Document adoc = AppServ.Application.DocumentManager.MdiActiveDocument;
           AppServ.DocumentLock dl = adoc.LockDocument();
            Editor ed = adoc.Editor;
            using (ed.StartUserInteraction(this))
            {
 [code]....