Here is a function I've written for the ADG Arcade! project. It is designed to get the player's name or initials for a high score list. The function include file has comments explaining how it works, and the demo project explains how to use it. The code is released for any use and abuse, so hack away!
You can
download the project here.
EDIT: Project updated to account for the change in mid() function in the latest update to AGK.
