PACKWIN compresses Microsoft DOS and Windows programs, to dramatically
reduce their size. Programs compressed by PACKWIN are functionally identical to the originals, only smaller. For example, consider the
422k "Setup" that is bundled with MS-Windows 3.1. PACKWIN compresses this file to less than 250k, or 59% of its original size. The smaller,
more efficient programs save disk space, LAN overhead, disk caching resources and discourage reverse engineering.
PACKWIN inputs a big program and outputs a small one. The process is
totally automatic and requires no additional drivers and no modification to source code or linking.
The compression algorithm used by PACKWIN is the standard public domain
LZ method.
Files must be DOS or Windows 3.1 executable files. Files that are not "New Executable" files, such as Windows NT "Portable Executables" cannot be compressed.