IBM DB2/400 Stored Procedure Returns Empty Parameter Values

This is not a question, just an observation for the benefit others.

We use a TStoredProc to access a stored procedure on an AS/400 DB2/400
V4R3 database. The stored procedure has parameters with the
ptInputOutput parameter type.

When using the Client Access/400 V3R2M0 ODBC drivers, the values in the
Params always came back empty. Switching over to the Client Access
Express V4R4M0 (with service pack SF60796) ODBC drivers allowed us to
receive the parameter values OK.