protected override void OnClick()
{
ArcMap.Application.CurrentTool = null;
UID dockWinID = new UIDClass();
dockWinID.Value = ThisAddIn.IDs.DockableWindowVisibility;
IDockableWindow dockWindow = ArcMap.DockableWindowManager.GetDockableWindow(dockWinID);
dockWindow.Show(true);
}