basic site integration

[DionDev]

i know this has to already exist

i am going to be integrating my site with vbulletin

i just want basic integration, so people stay logged in when they do log in and i can use their username/userid whenever i want

i just want a very basic integrated page to work with, and my site will also have a login form at the top of it which i want to log users in through vbulletin

thanks