how to draw cricle on Chart

Hi,

I am facing an issue regarding chart control, what I am doing is that I m plotting points on "point graph" and I need to draw a circle over the graph to indicate certain boundary (radius for the circle is known).

1.Till now I successfully plotted graph but I am unable to draw circle over the graph.

2. How can I draw such circle on graph control on Microsoft Report.

Thanks & Regards,

Maverick.