First, sorry form my bad English.

Put in the begining of your program, after the program login

SET RESOURCE OFF
COPY FILE FOXUSER.* TO (PrgUserNane).*
SET RESOURCE TO (PrgUserNane)

and, in the end of your program

SET RESOURCE OFF
ERASE (PrgUserNane).DBF
ERASE (PrgUserNane).FPT

When you look the dir, you will see who is in the program...