// Create extender and properties protected override void CreateChildControls() { base.CreateChildControls(); // The Label gives something to attach the extender to Label label = new Label(); label.ID = this.ID + "_NoBotLabel"; Controls.Add(label); _extender = new NoBotExtender(); _extender.ID = this.ID + "_NoBotExtender"; _extender.TargetControlID = label.ID; Controls.Add(_extender); }