Contents of the "windll" sub-archive for UnZip 5.3 and later:

  Contents       this file
  windll16.def   definition file for 16-bit UnZip DLL
  windll16.bcc   Borland makefile for 16-bit UnZip DLL
  windll32.def   definition file for 32-bit UnZip DLL
  windll32.bcc   Borland makefile for 32-bit UnZip DLL
  windll32.msc   Visual C++ 4.2 makefile for 32-bit UnZip DLL
  windll32.dsp   Visual C++ 5.0 "build file" for 32-bit UnZip DLL
  dllsetup.c     pre/post-processing code for unzipping
  windll.c       contains the entry point for the DLL, "fake" printing,
                 sound, rename, replace and password functions
  windll.h       header file for both 16- and 32-bit DLLs
  zipver.h       versioning information for resource file, and also
                 used by WiZ application itself
  windll.rc      resource file for both 16- and 32-bit DLLs
  windll.doc     simplistic explaination of how to use DLL
  structs.h      header file, used by both the DLL and by WiZ, that defines
                 several structures passed to the DLL
  example.c      a very simplistic example of how to load the DLL and make
                 a call into it
  example.h      header file for example.c

The Microsoft C port has not been tested as completely as the Borland port.
Note that Borland C++ 5.0 is full of bugs; version 4.5 or 5.01 is recommended
instead.  If you must use Borland C++ 5.0, using the Intel optimizing compiler
is required to avoid crashes (possibly due to a bug in the stat() function in
the normal Borland compiler).  This does have the advantage of giving you a
smaller code size than the 4.52 compiler.

Borland C++ 5.01 has resolved many of the problems seen with 5.0 and can now
reliably be used.

Note that I have been singularly unsuccessful in getting this to compile and
run under MSVC 1.52c.