Include the GROUPORDER=ASCENDING option in the VBARPARM
statements. For example:
vbarparm category=subject response=&var /
group=&group
datalabel=&byvar dataskin=pressed datalabelattrs=(size=6
weight=bold)
groupdisplay=cluster clusterwidth=1 grouporder=ascending;
or
keylegend / location=inside position=topright title="Highest Grade" sortorder=ascending;