Question

My VB.NET (3.5) application generates Excel reports.

Newer versions of Excel support the Office Open XML file format, while older versions don’t.

I’d like my application to identify which version of Excel is installed on the local machine, and use a different method for generating the report (Newer versions: by generating an XML file. Older versions: by utilizing Excel Automation).

How can I identify the Excel version installed on the local machine?

Answer 1

You can have a look at one of the following registry keys :

HKEY_USERS\.DEFAULT\Software\Microsoft\Office\11.0\Excel 
HKEY_CURRENT_USER\Software\Microsoft\Office\11.0\Excel

You should look for the existence of the key, with “Excel” in it, as you can have office 2003 installed, and visio 2007 aside, so both keys will exist, but only one will have an Excel subkey :

HKEY_CURRENT_USER\Software\Microsoft\Office\11.0
HKEY_CURRENT_USER\Software\Microsoft\Office\12.0

Number / Version correspondance

• Office 9 : Office 2000
• Office 10 : Office XP (First version to support XML format worksheets)
• Office 11 : Office 2003
• Office 12 : Office 2007
• Office 14 : Office 2010 (fun fact, 13 was skipped)