GRIP If specified, the GRIP option allows you to include in the lower-right corner of the window a triangular area in which you can click-and-drag to resize the entire window. So the grip affects the entire window, although it is a status bar style.
GRIP applies only to resizable windows. When it is specified, any resizing of a window using the grip triggers the same event as would resizing the window in a conventional way. If you specify grip in a non-resizable window, it is ignored.