>>I'm using pkzip2.5, which is completely command line oriented, and I'm building the command line in Fox, and launching it using Ed Rauh's Api_AppRun class. Works like a charm, except that it appears on the taskbar briefly, and if you call it repeatedly it may occassionally steal focus from your top level window (i.e. I'm zipping all the data files from within an app, and answering email while it works, and have some trouble typing, not always).
>
>What about licencing? Do you require that each user MUST have pkzip installed
>or do you distribute pkzip with your application ?

My bosses told me it's been paid for some previous version and that we have the right. So I distribute it - and if I didn't distribute, the users would be instructed where to download it from (PKZip's website).