The following example installs the add-in module stubcsp300_shr.exe in
   the CDSA MDS database.  The logical definition in the first command is
   necessary because the shareable image is not in SYS$LIBRARY and it will
   be invoked as part of the installation process.

      $ define stubcsp300_shr "cdsa_tempdir:[addin]stubcsp300_shr.exe"
      $ mod_install -i -s /cdsa_tempdir/addin -
      _$ /stubcsp300_shr.exe -d /cdsa_tempdir/addin