Intercept Post/Edit Hook?

[sleepygiant]

Hi Everyone,
I apologize if this is located within any thread or guide. I tried searching for the hook list, and found the 4.1 list-- but nothing helpful.

I would like to intercept a post and pass it to a PHP script that does some checking against an API.

In wordpress, it's the preprocess_comment hook, but I can't find the proper hook in vbulletin.

Any help would be appreciated!

john