Shoutbox

http://mpscripts.net/docs/ref-msgevents-chatwndreceivemessage.php

However, several methods can be used to guess if the message was actually sent by the current user. For example, to determine whether or not the personalized status messages should be sent when a message is received, Messenger Plus! compares the time of the last ChatWndSendMessage event with the current time. If it is less than 1 second, the message is considered to come from the current user and the previously recorded time is reset. Even if this method of analysis can seem too simplistic, it works in almost every scenario as it is extremely rare to receive a message sent by a contact between the time the "Send" button was pressed and the time the message of the current user was added to the window (as Messenger does not wait to receive a reply from the server before adding the message to the history control).