>I use dzactx.dll in my applications to zip data.
>I have to reinstall my operating system and I am looking for the source for this dll. I'm also looking for some support so am trying to figure out who made that control. I thought it was WinZip but they say it is not theirs.
>Does anyone know who created this control? I purchased it many years ago but can't find my documentation.
>
>Thanks!

I think it is Dynazip.

In any case, you can also take a look at http://www.sweetpotatosoftware.com/SPSBlog/2008/12/08/VFPCompressionUpdateACoupleOfFixesAndASlightEnhancement.aspx for Compression.fll made by Craig Boyd.