vfb_confirmation hook?

I need to be able to have my forms post to a leads service. I should be able to accomplish this with the vfb_confirmation hook, correct?

add_action( ‘vfb_confirmation’, ‘vfb_action_confirmation’ );

function vfb_action_confirmation( $form_id ){
<form action=”post url here”>
}

Could you give me an example of what it would look like if I only wanted this on forms 1 and 2? Also, where do I insert this hook? visual-form-builder-pro.php?

Thanks so much Matt!

http://wordpress.org/extend/plugins/visual-form-builder/