If I understood right, yes it is possible
You can fill in everything: buttons, check boxes, list boxes, edit boxes and normal text! It usually goes like this:
did -ra <name> <id> <text>
will fill the ID with the text you determine, so you kinda need that one for puting text.
switch, however, means that it will first erase
all data in the ID and then write what you want. If you would like to add
something, do not use the -r; if you want to just fill it and erase the previous text, then do use it
In your case you could use the On Start event, open the dialog and then use the On Dialog > init event to fill the listbox/text/whatever..
I hope this was what you were looking for
ZyzzyxEdit: MonoSex has got a point too