>we are looking to buy an OCX written in Visual Basic or C++ that will generate/draw a GANTT CHART from
> "date 1" to "date 2" or
> from "date 1" + length
> for multiple task and different scales of time (more functions are welcome, i.e. targets...)
>
>This OCX will be integrated in a VFP application

Rather than buying a separate OCX, you might try using OLE Automation with Microsoft Project. It's perfectly capable of being controlled from VFP, and provides plenty of capabilities beyond just creating a GANTT chart. It can also handle data from a number of sources, including DBF files.