Listbox Update

[kingzooly]

I have opted to use a Tree object since I was able to search for a item in the tree rather then knowing the ID

[kingzooly]

As you can see here I have my little chat box but no way of knowing when the chat is been updated

[kingzooly]

I need to update a ListBox I am using it as a user list and I need to add (n)Username
and each time a new message from that user comes in it changed n but I can't see how to update that

I can't use the on select option as it needs to update names what are not selected at the time, I was thinking a table but that means I have to really mess about with then a user logs off and removes them selves and I have to rebuild the list every time what could be a problem to the app since its listening to replys of messages.