>my system is stay on Novell 4.2 Lan Server.
>all office user have right to access the prg/data directory.
>but....i find that, they can open my database file in his ways (run local VFP to open OR open dbf file from EXCEL).
>
>how to protect my database file ??

Another thought. Search on "encrypt" and you will find some code for things like shifting bits.