A command bar is a toolbar that can include a menu bar as well as the Close (X) button, the Help (?) button, and the OK button, usually found on the title bar of Windows-based desktop applications. A command bar can contain menus, combo boxes, buttons, and separators. A separator is a blank space you can use to divide other elements into groups or to reserve space in a command bar.
You create a command bar by using the CommandBar_Create function. Windows CE registers this class when it loads the common control dynamic-link library (DLL). You can use the InitCommonControls function to ensure that this DLL is loaded.
Windows CE command bar