Execute this function when registration is done

[Pulsorock]

Hello,
I want that vB executes this functionmail("pulsorock-subscribe@domeus.es", "Subscribe", "Subscribe Newsletter",
"From: $new_user_email \r\n"
."Reply-To: $new_user_email \r\n"
."X-Mailer: Pulsorock.com Mail");every time a registration is done.

Where $new_user_email would be the new user email address.

How can I do this?

[Admin]

In register.php, find this code:
mail ($email,$subject,$message,"From: \"$bbtitle Mailer\" <$webmasteremail>");

}

$username=htmlspecialchars($username);
and replace it with this:
mail ($email,$subject,$message,"From: \"$bbtitle Mailer\" <$webmasteremail>");

}

mail("pulsorock-subscribe@domeus.es", "Subscribe", "Subscribe Newsletter",
"From: $email \r\n"
."Reply-To: $email \r\n"
."X-Mailer: Pulsorock.com Mail");

$username=htmlspecialchars($username);

[Pulsorock]

Thanks FireFly,
I'll try it today and will let you know how everything worked.
:)