VMS Help
CREATE, /MAILBOX, Qualifiers, /MESSAGE_SIZE
 *Conan The Librarian 

       /MESSAGE_SIZE=n

    Specifies the maximum size (in bytes) of a message that can be
    sent to the mailbox. The maximum value is 65535. If you do not
    specify /MESSAGE_SIZE or specify the value as 0, the operating
    system provides a default value from the DEFMBXMXMSG system
    parameter.
  Close     Help