>I need an Org Chart control for use in VFP7.

Not quite what you asked for, but here is a lead. I haven't tried this myself though.
http://www.humanconcepts.com/support/q001-0040-5300.htm
The pro version of this software allows you to use command line options to create and import data for a chart. Your users can then have the org chart browser plug-ing to view the charts.
http://www.humanconcepts.com/products/orgviewer.htm