c++ login system for vbulletin

[xRenegade85]

Hi

I am trying to make a login system that works through a MFC/C++ app, it lets the user enter the username and password, and then it checks whether the usernameand pass were correct by submitting the info to my vb powered board.
My problem is that i dot know how to get the return info, i understand that all i have to do is "http://www.mysite.com/login.php?user=MyUsername?pass=MyPass"(something like this) but i dont know how to get the return type like whether the login was successful or not.

Could someone please help me?

Thanks in adv.