working storage values

Have vendor started task that runs constantly while listening on port
1205. This started task has a loadlib with user written cobol
programs. This started task also has a control file (jcl ddname)
with a record. For performance reasons, I only want to read the
record one time only. How should I code the cobol program so that
the working storage values are retained between calls.

I can't statically link the vendor program with my program.....
.

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