sessions
 

Is there a way to initialize a session via code?

I would like to trigger a login via an externap application that has the same login name and password.

How do sessions work in vbulletin?

I dont know, what you mean ... please at explain

I would like to integrate drupal with vbulletin. I found a module in drupal that syncs up logins ... what I was wondering is if there was a way to login vbulletin automatically, without the user loging into both places, when the user logs into drupal.

I was trying to do some more homework on this and I was recommended not to sync this up but to try to override the drupal login methods.

In short what I am trying to accomplish is to have single sign on between drupal and vbulletin.

Look inside functions_login.php.