% TTCREATEMAILBOX   Create a mailbox for inter-task communication.%%  Usage: ttCreateMailbox(mailboxname, maxsize)%%  Inputs:%    mailboxname  Name of the mailbox, must be unique.%    maxsize      The size of the buffer associated with the mailbox.%       % See also TTTRYPOST, TTTRYFETCH%%       TrueTime, Version 1.3%       Copyright 2005%       Martin Andersson, Dan Henriksson and Anton Cervin%       Department of Automatic Control%       Lund Institute of Technology, Sweden