Sorry ,what I mean , The program wil run after registed by program which I have attach (setup.exe). Without the right key the program does not work.
so I must Run the setup.exe and fill the code , the right code will replace the code in config.dbf . So when the program is execute it look the code at config.dbf
The program made by foxpro too but it brand encsripted by Refox level 1+ . so it not posible to deassemble without knowing the right password for refox level 1+.

In my opinion/logic , the process can be reverse ,decode to encode so
the product ID can be reverse in to the code with the Opposite program
so i try understand the algorthym and make the opposite program ..but it seem to difficult to me ,so I Need a help from the expert.