>Thanks for the links but in my circumstance, the original source code doesn't exist and so a coded solution won't work. About the only way that I see to handle this is via a 3rd party product that patches the esl. Are there other products on the market that perform this?

Y2KFox doesn't require the source http://www.y2kfox.com/y2kfaq.htm
"A portion of the Y2KFOX engine for FoxPro DOS or FoxBASE is a TSR ...Y2KFOX does not modify these files. We think this is a bad idea, because, besides being a maintenance nightmare, modifying Microsoft EXEs and/or DLLs might expose you (and us) to violations of Microsoft license agreements."

Also see:
Message #301392
Thread #294063
Thread #288656