add_admin_bar_menus action-hook . WP 3.1.0

Fires after menus are added to the menu bar.

Usage

add_action( 'add_admin_bar_menus', 'action_function_name_8275' );
function action_function_name_8275(){
	// action...
}

Where the hook is called

do_action( 'add_admin_bar_menus' );

Where the hook is used (in WP core)