passing VB date to Oracle stored procedure

This question has probably been asked before, but here I go again.

Imagine the following Oracle stored procedure:

     PROCEDURE cv_lotsByNumOrEquip (
         prm_equip_id    IN lot.equip_id%TYPE,
         prm_start_date IN DATE);

Using OO4O (Oracle Objects 4 OLE), not RDO or ADO, how can a VB6 function successfully execute this procedure? I've attempted just about every format I can think of, but I always end up with the err msg

     OIP-00005: Variable not in a valid date format

Any suggestions would be most welcome.

Thanks in advance,
Garrett

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