Transfers control from your current process to the specified
    process. The LATCP ATTACH command is similar to the DCL ATTACH
    command. For example, from the DCL command level you can enter
    the DCL SPAWN command to create a LATCP subprocess without ending
    your DCL session, execute several LATCP commands at the LATCP
    prompt, then use the ATTACH command to return to DCL.

    Format

      ATTACH  [process-name]