how to use vb's api?

[eleetoburrito]

Hello. New to VB, would like to know where I can find a tutorial or a simple guide on how to call a function.

For example, on my site, I'd like authenticate someone when they login to my non vb site to then make a call to a function in includes/vb5/frontend/controller/auth.php and test their username, password, email and set the proper cookies and session values.

Any examples would be appreciated.

Thanks