>AFAIK, this info never was made public by MS.
>
>>Hi
>>
>>I'm studying some encrypt-vfp software, want to write my own
>>to protect my product.

I think that coming up with one's own ways to decrypt the p-code is always the first step in building a code encryption for Fox. It's never been published, and it's changed each version - but it's been done. Guys from Refox did it, and so have others.