Folks,

My previous message was a bit long, I know... And as it takes a
certain amount of time to publish messages in this group, I wanted to
warn you that I already solved some issues. So don't respond this post
please.

I'll try to be more focus next time.

Well maybe my code will be useful to other people. Here are the key
words :

populate listbox with unique values
create add / remove button between 2 listbox
sort listbox content in alphabetical order

Vincent