Notifying a user's role change by admin

Hi,

I’m trying to add a hook that notifies via e-mail the user when an admin modifies the user’s role.
I. E.
Admin changes manually the role of a user from s2member_level1 to s2member_level2.

I’d like to get a function to notify a user by email, so I should retrieve the information about the user’e-mail and pass it to wp mail()

Just to start from somewhere, I tried to hook the wp’s function “update_user_option” inside the s2hacks.php to send an email with some random information to myself, while updating the logged admin profile, but with no luck.

add_action("update_user_option", "my_action_hook_function");
    function my_action_hook_function($vars = array())
    {
     
	  $user = new WP_User ($vars["user_id"]);
        wp_mail ("example@whatever.com", "Subject ( " . $user->user_login . " just updated their Profile )", "Message Body goes here.");

    }

Any help would be very much appreciated !

Hi,

I’m interested in being able to implement the same function as mentioned by Enzo Topico.

Thanks

Mark