or the appropriate reference to the data.</P>
<P>
Armed with this reference, the application can then act on the message. The message body should be treated as read-only and not be modified by the application in any way.</P>
<P>
When it's done with the message, it calls the library again to say it's done with the message (this call is passed on to the data driver to do with as it sees fit). </P>
<P>
If the application has no further use for the message descriptor, it will call the Mailbox library to say the