facebook - Facebook login using api's

Question

I have one website and i'm trying to achieve the following please help me I want to login to facebook from my website. i know the username and password of user can i login at the server using facebook api's for that user and use that session on the person viewing my site. My site has a facebook button when user clicks on it i have to open facebook page on different browser tab with that user logged in. please suggest

Answer 1

Here is the starting point of using Facebook API

http://developers.facebook.com/

http://developers.facebook.com/docs/reference/apis/

http://www.developer.nokia.com/Community/Wiki/Facebook_authentication_in_Windows_Phone_application

Update: Login Implementation

ASP.NET Implementation

ASP.NET MVC4 Implementation