How to fill in a list with dynamic data ? (from a newbie)

Hello, I'm new in REBOL. My data are held in a Mysql database. I know how to read them. I want to display them in a list, then choose one line in this list by clicking or double-clicking and display all the datas related to this line. I have 3 questions about the processing of the list. 1 . What is the syntax to dynamically change the contents of the list. 2 . How to get the click event and the values of the line pointed to. 3 . How to scroll in the list using a scrollbar. Thank you for your help.

I put together a vid list demo after your question. (It's good for me too.) do http://anton.idatam.com.au/rebol/gui/demo-vid-list.r Anton.