what code do i need?

hello
i write a litle script for vb
but everybody can see it
i just want that only my registred members kan see it
and not the guests
so what code do i have to place it





greetings
BaBa2002

Planet Blowreactor

[all-the-vb]

PHP Code:

if ($bbuserinfo[userid]==0) {
  show_nopermission();
} 

[BaBa2002]

thx