>I found a light solution but i dont know if it have a good reliability.
>can put any data on a special personal folder and then hide it (lock without password) or unhide it (unlock with a password) with a small DOS code.
>it seems to work properly.
>this solution is in this link:
>http://operating-systems.wonderhowto.com/how-to/lock-folder-without-any-software-with-password-0150639/
>i translated it to vfp and compiled a crypted exe (13 ko).
>Give me your advice on the link above please.

All that does is rename a folder to something obscure, then sets its System and Hidden attributes to True.

If you fire up an Administrator CMD window and run

C:
CD \
DIR /adsh /s

it will list your "hidden" folder.