Plot Secondary Y-Axis in Excel

Question

I have two series of data and am trying to plot them to a primary Y-Axis and a secondary Y-Axis in Excel using ActiveX.  Right now I have a file in Excel that I am using to test my code that has the values 1 through 20 in the first three columns and is saved as test.xlsx in the filepath C:\Templates\test.xlsx.  I am able to open this file and plot the data in an XY scatter chart and name the primary x and y axes, but cannot figure out how to plot one of the data series against the secondary y-axis.
I created a macro in Excel and viewed the code it created to make a secondary y-axis.  This is the code:
Sub Macro1()
' Macro1 Macro
    ActiveSheet.ChartObjects("Chart 1").Activate
    ActiveChart.SeriesCollection(2).Select
    ActiveSheet.ChartObjects("Chart 1").Activate
    ActiveChart.SeriesCollection(2).AxisGroup = 2
    ActiveSheet.ChartObjects("Chart 1").Activate
    ActiveChart.SeriesCollection(2).Select
End Sub
When I try to do this with ActiveX, I can select SeriesCollection(2), but when I choose AxisGroup, it is only a read function and I cannot write a 2 to it.
Is there another way to plot one of these data series against a secondary y-axis.
Attachments:
test.vi ‏31 KB

Answer 1

The attached image was the way that I would have thought I was supposed to create the secondary axis by writing a 2 or xlSecondary to the AxisGroup, but it does not work because AxisGroup is Read Only and I cannot write to it.
http://msdn.microsoft.com/en-us/library/aa141701%28office.10%29.aspx
If I create a secondary axis using a macro, I can act upon that axis.  However, I am not able to create the secondary axis without a macro, which is what I would really like to do.
Ryan
Attachments:
ActiveX.jpg ‏9 KB