How can I place a page link to the sidebar admin bar?

Question

I have added custom menu link by following. Hope it will be helpful.

add_action( 'admin_menu' , 'custom_admin_menu_new_items' );
function custom_admin_menu_new_items() {
    global $menu;
    add_menu_page( 'My Page', 'My Page', 'manage_options', 'my-page', '','', 6 );
    foreach($menu as $mIndex => $mData) {
        if($mData[2] == 'my-page') {
            $menu[$mIndex][2] = 'http://mypage.com/mypage';
            break;
        }
    }
}

Action hook admin_menu is used. New menu is added by add_menu_page. And after that URL of the menu is overridden by checking the slug in the foreach loop.