So when main program runs custom, shouldn't you pass some sort of parameter to the custom program? If it doesn't get the parameter it expects, it won't run...

>Hi Steve...
>
>I use Xitech Cryptor... so, it is the problem... Users can access my DBF just if the files are registred and this function is realized by MAIN.EXE...
>
>So, if someone copy the CUSTOM.EXE, he can open the table and then update, delete, insert rows.... :-(
>
>Without REGISTER these files, nobody could change the data.
>
>[]s