SMSG.HELPCMD2.D1

1.  Special messages do not appear on the specially programmed virtual
    machine's  screen because the messages are designed to be
    instcactions that are passed as data parameters.  The special
    messaqes are stored in the prespecified VMCF data receiving
     area as they are received, and the instructions are processed
     by the proqrammed virtual machine.
 
2.  Virtual machines can only receive and process special messages
    ander these two conditions: (1) the virtual machine has issued the
    SET SMSG ON command, and (2) the user wishing to receive special
    messaqes has issued an AUTHORIZE with the Virtual Machine
    Communication Facility (VMCF) of VM/370.
 
    Note: Refer to VM/370 System Programmer's Guide for more
    information on the AUTHORIZE function of VMCF.