>>Is there a VFP tool with source code, free if available that would let me zip files?
>
>https://github.com/VFPX/Win32API/blob/master/samples/sample_568.md

Intersting, but uncertain if free of Dynazip IP as doc mentions XP as first verified working OS.
Text also cites incompability with .Net already - could be classified as extremely weak encryption ;-))