Shading under/between vb line chart

[robertybob]

Hi.

I've managed to get a chart built that displays a couple of line graphs using standard Chart/ChartArea etc

I can't, however, seem to work out how to add shading to the area below a graph line or shade the area between 2 lines.

Is there a simple built-in format for this or do I need some 3rd-party add-on?

Thanks