OScope__NAlabel (ul_pbar_graphics)

 *  Synopsis:
 *    #include <ul_pbar_graphics:oscope.h>
 *
 *    TOScope__Result OScope__NAlabel( void )
 *
 *  Function intent:
 *    OScope__NAlabel() allows the user to set the X-coordinate label to
 *    contain only two numeric labels ala network analyzer displays.
 *  Function parameters:
 *    none
 *  Function return value:
 *    CBS_OK    success
 *    ~CBS_OK   OScope__DisplayScreen() already called