BuddyPress.org

Hi, how can I add a new local Buddypress notification? I’ve seen the codex, the other threads, the code of various plugins that use the local bp notification system but I haven’t managed to make it work yet! This is an extract of my code:

$the_query = new WP_Query( array( 'category_name' => 'catname'); 
if ( $the_query->have_posts() ) {
	*send local notification*
} else {
       *dontsend*
}

(Also, it would be awesome if when the user clicks on the notification, it (the notification) disappear from the bp notifications list)