VMS Help SET, COMMAND  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    Invokes the Command Definition Utility, which adds commands to
    your process command table or to a specified command table file.
    For a complete description of the Command Definition Utility,
    refer to the OpenVMS Command Definition, Librarian, and Message
    Utilities Manual.

    Format

      SET COMMAND  [filespec[,...]]

  Additional Information (explode) :

• Parameters
• Qualifiers
• Examples