admin_bar_init action-hook . WP 3.1.0

Fires after WP_Admin_Bar is initialized.

Usage

add_action( 'admin_bar_init', 'action_function_name_1975' );
function action_function_name_1975(){
	// action...
}

Where the hook is called

do_action( 'admin_bar_init' );

Where the hook is used (in WP core)