You can look at DynaZip site. It's not free, but it has examples in C, Delphi, Visual Basic and VFP.

If you want to use WinZip, you can run it using ShellExecute API function. I'll search here for parameters, because I believe, this problem was discussed before, though from VFP point of view.

Ok, here is a helpful thread: Forum: Visual FoxPro Category: Visual FoxPro in general Title: Re: Using WinZip Thread #527556 Message #527577


>let's say that i want to zip a folder with certain files, but i dont
>want to show the winzip' s interface, i just want to use its DLLs so i
>can make my own " Zip extension files" can you guys help me, i think
>we can do it with a shell using the DOS pkzip file.
>
>Also, i would like to know how to unzip directly from a zip file, i
>mean not to ask a word, go directly to a folder that will be overwrite
>every day with the new information. Can you tell which parameters i
>need to make this work the way i want. Example:
>
>Unzip exportation.zip c:\Exporta\today
>
>Let me know this.