>>I am planning to create some graphic reports, like charts, and also some interactive reports, where you could click on an item and "drill down" or group/ungroup items. It should be possible to integrate in VFP code seamlessly. What would be the best options for this?
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>Check https://vfpx.codeplex.com/wikipage?title=FoxCharts&referringTitle=Home

Thanks, that looks very promising. Not sure yet if it's possible to make it interactive, but the simple results look very good for charts.