The LAT Control Program (LATCP) allows you to control the LAT port
   driver (LTDRIVER) on a VMS node and to obtain information from
   it. For example, you can use LATCP to create services on the local
   VMS node, to associate a port on the local VMS 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 in effect 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