protected override void CreateChildControls() { Controls.Clear(); containerPanel = new Panel(); containerPanel.ID = "containerPanel"; containerPanel.CssClass = this.CssClass; this.Controls.Add(containerPanel); dragHandler = new Panel(); dragHandler.ID = "dragHandler"; this.Controls.Add(dragHandler); //contentPanel = new Panel(); //contentPanel.ID = "contentPanel"; //this.Controls.Add(contentPanel); if (!this.DesignMode) { _dragPanelExtender = new DragPanelExtender(); _dragPanelExtender.ID = "_dragPanelExtender"; _dragPanelExtender.TargetControlID = "containerPanel"; _dragPanelExtender.DragHandleID = "dragHandler"; this.Controls.Add(_dragPanelExtender); } }