How should I do this?

[NiLord]

Hello Mybb developers, long time no see you!

I want to do a Mybb plugin but this one require something i've never done before with mybb. I need to manipulate the user's post and change some part of it. On the other hand I do need too the post ID...

What do I need to do to get this information and change the post itself?

[User 2877]

hook: postbit
object: $post
variable: $post['message']