Format of LANtastic message buffer:
Offset	Size	Description	)
 00h	BYTE	reserved
 01h	BYTE	message type
		00h general
		01h server warning
		02h-7Fh reserved
		80h-FFh user-defined
 02h 16 BYTEs	ASCIZ destination machine name
 12h 16 BYTEs	ASCIZ server name which user must be logged into
 22h 16 BYTEs	ASCIZ user name
 32h 16 BYTEs	ASCIZ originating machine name (filled in when received)
 42h 80 BYTEs	message text