Hi,
I'm using Microsoft.Office.Interop.Excel and VB.Net with ASP.Net to
create an Excel workbook with an Excel chart in a worksheet. Most of
the code works that I developed in VBA. The chart is created. But, it
fails to find any properties or methods of the PlotArea class. Even
though they are "available" in the context menu.

This line works:
xlApp.ActiveChart.ChartArea.Border.LineStyle = 0

But this fails:
xlApp.ActiveChart.PlotArea.Interior.ColorIndex = xlNone
with the error message "Unable to get the Interior property of the
PlotArea class"

(xlNone is a constant)

Has anyone run into a similar problem?

Thanks,
Wendell