Shoutbox

Is there any way at all to intercept and clear an offline message (yes, I said something kinda stupid to a person) before the reciever signs on and well... recieves it? I realize it's stored on the MSN server, so, not much of a change, but still

Oh yes, I have Windows Live Messenger, and also the Plus! Live plugin.

There isn't. Once it's sent to the server you cannot undo it .