>For distribution purposes, the Win32 API has support for file decompression in the API; a whole set of calls for extracting files which are LZ compressed are available.

Ed,

As I recall, these compression functions have been available at least since Win16. I did some playing around with them because of their availability. Again, as I recall, I wasn't terribly impressed with them. I can't remember whether the reason was that they were either terribly slow and/or the compression ratio wasn't as good as PKZip.

I hadn't thought to revisit these under Win32, perhaps doing so might be in order.