WP Create help tab #1

add_action('admin_menu', 'page_with_help');
function page_with_help() {
    global $wp_meta_boxes;
    $page_with_help = add_menu_page(
        __('Page with Help', 'pwh'),
        __('Page with Help', 'phw'),
        'manage_options',
        'pwh',
        'pwh_page'
    );
    add_action( 'load-'.$page_with_help, 'pwh_add_help_tab' );
}