The RexxDeleteQueue return values are:
────────────────────────────────────────────────────────────────────────
0 RXQUEUE_OK The queue function has completed
successfully.
──────────────────────────────────────────────────────────────────────
5 RXQUEUE_BADQNAME The queue name is not valid, or
you tried to create or delete a
queue named "SESSION."
──────────────────────────────────────────────────────────────────────
9 RXQUEUE_NOTREG The queue does not exist.
──────────────────────────────────────────────────────────────────────
10 RXQUEUE_ACCESS The queue cannot be deleted
because it is busy.
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