Hi Canh,
You might try Armadillo,
It's seems to be a very good packer and protector. You can download a trial version from
http://www.siliconrealms.com. You'll need the professional version for VFP application, but in fact it will pack any EXE file. (professional version is arround $200)
It has some great features for creating activation keys, limited demo versions etc. They claim to be very secure.
Walter,
>Hello everybody!
>I have got a serious problem with the .EXE file which is build by MS VFP project. Someone uses refox software to generate source code from the .EXE
>What do I do to deter someone from that.
>Canh