Sir,
Thank you a lot to help me its done.
Another question please,
How can I hide window database ( make f11 not active) because I don't want any one to see what I did (access 2003)
Thank you again

OK, First, Access is not the most secure platform. Anyone with a decent knowledge of Access can get past most of the things you can do to secure your design.

This article lists some of the things you can do:
How to enforce or disable the startup options in an Access database project

But, if I understood you, this is a school project so why the big secrecy?

If you want to disable F11, you could capture each Keypress check for F11 and do something else, but that would probably slow down your app.