Triggers before profile is loaded so you may register some menus if you wish or peform different stuff.
~~~
<?php
function my_component_init(){
ossn_register_callback('page', 'load:profile', 'my_component_cb');
}
function my_component_cb($callback, $type, $params = null){
//it have no paramters values.
//you can use ossn_get_page_owner_guid function to get a profile GUID.
}
ossn_register_callback('ossn', 'init', 'my_component_init');
~~~