I am developing a application that "control" some computers... I want it to have a function like InterCafe's

(http://www.cybercafe-software.com/screenshots/sc_sicherheitseinstellungen.html) policy manager. Where can I get information about this? I don't know what to search on... Should I use ADM files? Help plz

I would checkout Microsoft's own documentation. Try http://www.microsoft.com/security

You should also look to the National Institute of Standards and Technology (NIST)

http://www.nist.gov

and the Center for Internet Security

http://www.cisecurity.org

There are tons of templates and policies out there on the net to lockdown Windows PC's.

Good luck.