LATCP allows you to control the LAT software on a node and to
    obtain information from it. For example, you can use LATCP to
    create services on the local node, to associate a port on the
    local node with a service or device on a remote terminal server,
    and to display information about services offered on the local
    node or on other nodes in the network.

    When you use LATCP commands to change LAT characteristics (such
    as creating a service and associating a port with a service),
    the changes take effect immediately. However, when the LAT
    port driver stops, these characteristics are lost. If you want
    these characteristics to be present the next time you start
    the LAT port driver, edit LAT$SYSTARTUP.COM by modifying or
    adding commands to set these characteristics. Then, invoke
    LAT$STARTUP.COM to start the LAT port driver.

    Format

      RUN SYS$SYSTEM:LATCP

    To invoke LATCP, enter RUN SYS$SYSTEM:LATCP at the DCL command
    prompt. At the LATCP> prompt, you can enter any of the LATCP
    commands.

    To exit from LATCP, enter the EXIT command at the LATCP> prompt
    or press Ctrl/Z.

    You can also execute a single LATCP command by using a DCL string
    assignment statement, as shown in the following example:

    $ LCP :== $LATCP
    $ LCP SET NODE/STATE=ON

    LATCP executes the SET NODE command and returns control to DCL.