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

Given: Office32 is installed into "Program Files (x86)", this works for me.

I basically check to see if winword.exe is somewhere below the key. If they don't install the word part, well, tough at this point. I use this to variably run 32-bit or 64-bit msi installers for office.

  
    
  



  
    
    IS_32BITOFFICE
   
  
    
    NOT IS_32BITOFFICE