The title bar is the striped bar at the top of the active window. It contains the window's name, the close box and the zoom box. In order to work with a window, the window must be active. Only one window at a time may be the active window. The active window is always the frontmost window, and inactive window always appear behind the active window, The active window's title bar has black lines, its size, zoom, and close boxes are defined, as are its scroll bars.
Inactive windows show the window's name but none of the other distinctive window features.