>I am almost finished writing a scanning utility to highlight all references to date/time functions in prg files across a whole disk

Interesting. How about tracking other variables involved in the statements?
Like cDate = DTOC(DATE())
Then later in the code cYear = RIGHT(cDate,2)

If the tool can't track things like this, then it gives a false sense of security.
I decided that I didn't want to write a VFP parser and cross-reference tool myself, so I'm waiting for a solution...