This instance method will insert all menu items in ulMenuID MenuID into the pop-up or pull-down menu.
Menu item IDs in open cascade must match corresponding open view.
Class-specific menu IDs should be above WPMENUID_USER.
The wpInsertMenuItems method is a superset of the OS/2 Warp version 3 wpInsertPopupMenuItems method. All new or modified object classes that formerly called the wpModifyPopupMenu method should override the wpInsertMenuItems method instead. This gives you more control over what menu items are added to or removed from the popup menu as well as the folder pull-down menus.