>Does anyone have some code that they would like to share to drive 7-Zip from VFP?
>(7-Zip is a free Zip program.)

On Foxite.com there is a program called „Live Backup created by Jun Tangunan.
It uses 7Zip to compress the backup data.
Click on
http://weblogs.foxite.com/sandstorm36/
and scroll down or search for "Live Backup Revealed"
The source code is included.