Detect whether MS Office installed is 32bit or 64bit by using registry

Question

I want to install vsto addin based on the excel version (32 bit or 64 bit). I am planning to bundle both 32bit and 64 bit msis and install one by determining the excel versi

Answer 1

You can use the product code (GUID) to identify the bitness of Office applications. See How to detect whether installed MS Office 2010 is 32 or 64 bit for more information.