How do I behave my application's logged in same as asp.net logged in

Hello everyone! By reading my question, you would get the idea. I'm working on application that requires user login information to access to members-only resources/pages. My question is, when I verified from database that user is valid user, how can I register him in a way that satisfy the following:   Request.IsAuthenticated 'is user is authenticated to view that requested page or not?   I mean, if we create a new project in VS 2010, it creates a database, an account folder( some members only page), when we register using default setting, it automatically signed us in and give access to members only pages.  There is db called applicationservices. how can we implement this behavior using my own custom settings?  Any suggestion anything will be very very helpful. thanks in advance.   (P.S: please ask me before reporting 'bad question' to this question. please!)