Sort Group List by Surname

I am hoping someone can help me. I have been asked to create a button that will sort our group member list by surname. I have found the “Sort Member List” button that presently sorts these lists by Firstname. Unfortunately my grasp of Lotus Script can only be described as shocking and I dont really know how to amend the “Sort Member List” code to do this.

Has anyone done this already or can they maybe give me a few pointers?

Regards

Mark

Subject: Sort Group List by Surname

use @Contains in the button