[HOWTO] Integrate PunBB with own Website (register and login)

Hello all.
I read a lot of threads for that question.
I want when a user registers at website (with website registeration form) i wanted that the registered information got also injected into the punbb database so that the user didn't have to register seperately later on the forums.
What i have to do?

I found in wiki code for login integrate - it works. But i cant find code for register registration form..
How to do this integrate? Any suggestions?