[CommandMethod("CDL")] public void ShowColorDialog() { Document doc = Application.DocumentManager.MdiActiveDocument; Database db = doc.Database; Editor ed = doc.Editor; var cd = new Autodesk.AutoCAD.Windows.ColorDialog(); System.Windows.Forms.DialogResult dr = cd.ShowDialog(); if (dr == System.Windows.Forms.DialogResult.OK) { ed.WriteMessage(" Color selected: " + cd.Color.ToString()); } }