Originally posted by matty
Few things the window NEVER opens and therefore the Window Message cannot be registered. I will have to look at it later to see why this is.
You got the params the wrong way round when creating the window (and missed an e in listener)
You also forgot to close the <TopMost> tag in the XML.
After fixing these however I still can't get it to work. Quickly reading the scripting docs makes me think its something to do with the absence of 'PlusWnd::RegisterMessageNotification', however I have no idea how to implement it.