I am trying to built the package for the cyber cafe.

User should be able to access the system, any program, start menu, utilities only after getting logged in to the server (where the time duration will be calculated).

Login and logout of the user is been monitored at the server.

Can anybody help me in finding the way to lock the window till the user logs in through my application?

I am trying to display the invisible full screen form which won't allow any event on the windows and will cover the entire screen. But not getting the way to work with it.

Kindly help, how to move further.
Thanks in advance.