Unzipping and Zipping files
Have look at www.gzip.org , they have links to an OCX (or the zlib folks do)
Check out lszip (Lindersoft product). We have the DLLs installed on 90,000 custom machines.
nsoftware has a zip component. Haven't used it, tho.
I use xceedsoft's zip/unzip component. Never had any problems.
We use DynaZip-NX with no problems ever. MS used DynaZip for the zip support in WinXP, which is a pretty good endorsement.
I believe infozip (the free one) has one too.
You should probably check out pkware.com. They originated the zip file format, and they have an API for several common languages. It's how they make their money, since they give away at least a version of their software.
I think you will find most zip products out there are based on zlib. http://www.gzip.org/zlib/
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