Contents of the "vms" sub-archive for UnZip 5.12 and later:

  Contents            this file
  README              general VMS info about using UnZip and zipfiles
  unzip_def.rnh       UnZip default help page, RUNOFF format
  unzip_cli.help      UnZip VMSCLI help page, TPU format
  unzipsfx.hlp        UnZipSFX pre-formatted help page
  cvthelp.tpu         TPU macro file to convert .help file to RUNOFF format
  cmdline.c           VMS-style command-line-interface code (if VMSCLI defined)
  unz_cld.cld         more VMS-command-line stuff (if VMSCLI defined)
  vms.c               VMS file manipulation code
  vms.h               VMS header file for UnZip
  make.com            command file to make UnZip with GNU or DEC C on VAX or AXP
  descrip.mms         MMK/MMS makefile for UnZip/ZipInfo and UnZipSFX
  vmsshare.opt        options file used by descrip.mms
  unzip.opt           options file used by descrip.mms and make.com
  unzipsfx.opt        options file used by descrip.mms and make.com
  clean.com           command file to remove .obj and .exe files; used with MMS
  makesfx.com         command file to create self-extracting archives

MAKE/VMS is no longer supported since MMK (MMS clone by Matt Madison/MadGoat
Enterprises, compatible with descrip.mms) is both free and becoming quite 
popular.  MMK is available by anonymous ftp from ftp.spc.edu/ftp.wku.edu and 
by mailserver at wkuvx1.wku.edu.  Check VMS newsgroups for announcements and 
exact location.

The MAKE.COM command file accepts compilation options in a LOCAL_UNZIP 
symbol or logical; the format is "VMSCLI,RETURN_SEVERITY" (for example).
DESCRIP.MMS must be edited in order to use special options.