Using MSSQL Users

[محروم.كوم]

Hi,

I have a web application in asp.net using mssql database, I just installed vbulletin, in my mssql database there are some 5000 users, I just want when they want to register to forum, there username and email id from mssql be displayed in registration form of forum, I have stored there details in cookies, but how to read it on registration form,

Note : Not good with PHP


Thanks __DEFINE_LIKE_SHARE__