>>I need to write a Visual Foxpro program by VFP 3.0 that can be run in Win 3.1 or Win 95. Now, I need to add a function in the program that can backup some data to the floppy disk(s). How can I do so?
>
>>The data files may span over one disk.
>In this case better to compress data first. For such purposes I called LHA.EXE DOS compressing utility from the VFP (the reason - it is free :). You can use some Windows programs of that kind, like DYNAZIP for example.
>
>Nick

I've been using DYNAZIP and, as I've said before, I can recommend it. It costs about $300. It has just about any compression feature you can think of. Best of all, Innermedia tech support actually knows how to use their product in VFP (which I've learned here is unusual for companies that make .OCXs). I e-mailed them about a problem I had using their progress bar, and got a reply in about 2 days which taught me something new about how vfp3 works. Their site is www.innermedia.com and also has a few other products.

We decided to buy it partly because the two basic windows-based compressors we tried, WinZip and PKZip for Windows, don't really work from a command line the way old PKZip for DOS did. PKZip for Windows, made by PKWare, doesn't have command line switches, though they say they plan to add those in. WinZip, made by Nico Mak Computing, has them, documented only on their web site, and they are inadequate if you want to do much. It's better to use a real programming tool like DynaZip anyway.