Hi James,
As far as I know, you cannot use VBA code to get your result. Because Excel object model didn't provide the interface.
If need more information about it, I suggest you post your issue to MSDN forum for Excel
http://social.msdn.microsoft.com/Forums/en-US/home?forum=exceldev&filter=alltypes&sort=lastpostdesc
The reason why we recommend posting appropriately is you will get the most qualified pool of respondents, and other partners who read the forums regularly can either share their knowledge or learn from your interaction with us. Thank you for your understanding.
Regards,
Emi Zhang
TechNet Community Su