CALL GASK ('MAXDISP',
units, x-dim, y-dim, x-pixels,
y-pixels, return-code-variable);The GASK('NUMGRAPH', . . . ) routine returns how many graphs are
in the current catalog. The catalog checked is the catalog selected
in the GSET('CATALOG', . . . ) function, if specified. Otherwise,
it is the default catalog, WORK.GSEG.