Adding text to the chat window (without the contact seeing it) is not possible with Plus! yet. But regulary requested too....
Maybe as an alternative you can use the function ChatWnd::DisplayInfoMessage (see scripting docs) to display some one-line-text in the information area (the status bar where "user is typing" is shown too)....
This post was edited on 03-10-2008 at 12:31 AM by CookieRevised.