>>>Is there any documentation on how to access the Winzip interface from an application?
>>>
>>>From Visual FoxPro, I would like to have access to Winzip to zip and unzip a file. As for my applications, I use Dynazip but for a client site, they would mostly like to use Winzip for that.
>>
>>does your client have the documentation?
>
>Yes, they have a corporate licence. However, I think that documentation is only for the interface.

The command switches for WinZip were on the Nico Mak web site, last time I looked, which was several months ago. They resemble the ol' PKZip switches. Evidently they are an afterthought, or they would have been documented better. There is no mention anywhere I have seen of WinZip being an OLE or DDE server.

Since DynaZip is ZIP compatible, distributable in runtime for free, and has every option you could ask for, why on earth does the client care? Maybe you can make your own form and call it WinZip :).