Show all series' values in stacked bars mouseover (ASP.NET CHART)

Question

Hi...

I'm using the asp.net Chart control to present a stacked bars chart.

I can create a mouseover custom tooltip using this code:

series.MapAreaAttributes = "onmouseover=\"showTooltip('#VALY');\"";

... which works fine. But I can't seem to find a way to show the rest of the values for the other series in that column.

Example: I have 2 series (Paid and Unpaid) making up a single column in the chart. When I mouseover any of the series, I want to show both the value of the moused-over series, but also the other series contained in that particular stacked column.

Can anyone point me in the right direction?