I've created a pie chart control on a form and the data that will be dispayed on the chart will be taken from a text box or numeric updown (also on the form) that have values. Unfortunately the chart is not taking these values or data. The strange part is that I cannot find any book that address this issue of charting or explain how to do it even though I find it an imoprtant topic; I don't know why? Can anyone please help on this or advice if there is a book that address it.

Thanks
Khalil

What method are you using (or trying to use) to make a 'connection' between the up/dn ctrls & the chart?

I am not sure what do you mean by connection?

I have this code:

Private Sub AxMSChart2_ChartSelected(ByVal sender As System.Object, ByVal e As AxMSChart20Lib._DMSChartEvents_ChartSelectedEvent) Handles chtLoan.ChartSelected
        Dim Result(,) As Object = New Object(,) _
        {{"Principal", "Interest"}, {Principal.ToString, TotalInt.ToString}}
        chtLoan.ChartData = Result

    End Sub

Thanks