Creates an OSI Transport Application.  An OSI Transport Application
    entity stores information about an end user that is activated for
    receipt of an incoming connection request when the request contains
    that end user's name in its Destination Name field.

    The following is a required argument:

    o   Application Name

        Simple name to be assigned to the application.

    The following arguments are optional:

    o   Filename

        The name of the program to be invoked upon receipt of a connect
        request containing a TSEL matching the "Called TSELS" attribute
        of the Application entity.

    o   Username

        The user name portion of the access control information that
        identifies the account under with the application is to run.
        If invalid information or no user name is specified, system
        defaults are used to select the user.

    Press the OK button to create the OSI Transport Application entity,
    or press the CANCEL button to cancel this operation.  In either case,
    you will return to the main window.