This section describes the subroutines that can be called from a FORTRAN
program to interface with the Graphics Window Manager. All these routines
use the inherited status strategy which means that if the STATUS
argument is not set to the value SAI__OK on entry the routine will
exit without performing any action. If an error occurs during the execution
of a routine the STATUS will be set and an error will be reported
using the error message service
(EMS--SUN/104).
GWM --- X Graphics Window Manager