These interfaces get and set the screen stripe height - an additive and subtractive operation. Be careful you do not end up with no screen stripe or a very large screen stripe. Refer to the XTSOLsetSSHeight(3) and XTSOLgetSSHeight(3) man pages.
These interfaces are reserved for the Window Manager.
Status XTSOLgetSSHeight(Display *display, int screen_num, int *newHeight); void XTSOLsetSSHeight(Display *display, int screen_num, int newHeight);