OSF/Motif provides the components for building menus (buttons, menu shells, and so on) but does little to make menu construction easy. ViewKit ObjectPak provides a set of classes that facilitate common operations on menus, including creating menu bars, menu panes, popup menus, option menus, and cascading menu panes. The ObjectPak menu package also provides an object-oriented interface for activating and deactivating menu items, dynamically adding, removing, or replacing menus items or menu panes, and performing other operations.

The VkSimpleWindow class is useful for windows that require only a work area. However, windows frequently require menus. By providing support for a menu bar along the top of the window, the VkWindow class extends the VkSimpleWindow class.

This section describes the following three methods that you can use to create the contents of a window:

VkSimpleWindow and VkWindow constructors both have the same form: