Creates a subprocess, enabling you to execute DCL commands
    without terminating your LATCP session. The LATCP SPAWN command
    is similar to the DCL SPAWN command.

    To return to your LATCP session, either log out of the subprocess
    by entering the DCL LOGOUT command, or use the DCL ATTACH command
    to attach your terminal to the process running LATCP.

    Format

      SPAWN  [DCL-command]