The other way to create a menu or menu bar is to create a CwRowColumn widget configured as a menu or menu bar, and add individual button and separator widgets for the menu items. Convenience methods are provided for creating CwRowColumn widgets that behave as menu bars or as pop-up and pull-down menus. Although non-simple menus allow separate callbacks to be registered for each menu item, they are more cumbersome to program than simple menus.