Parameters for Target Page
 

I have developed a site in VB.NET and MS SQL server. This site is a companion site to a vBulletin site on the same ERP system.

What I would like to acheive is the following:

When a user enters my site directly from the vBulletin site their credentials should be passed to my site. If they do not appear as users in my site, then the site automagically adds them to the user database, taking any relevant data from the vBulletin site.

Secondly, my site allows users to search for documentation on function modules. I would like to display related links from the search page of the vBulletin site underneath.

I have had a look at the export functions available and the only one I can find appears to accept only an entire forum number as it's argument.

I can screen scrape a web page quite easily, but I do not know how to send the relevant parameters to get the target page to do what I want.

Is this feasible? Does vBulletin already have the required entry points to enable me to do this?