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How to detect whether 32bit or 64bit Outlook is installed? RRS feed

  • Question

  • How to detect if 32bit or 64bit Outlook is installed on the local computer? The method should support Outlook 2003 to 2013. Thanks
    Saturday, June 28, 2014 3:51 PM

All replies

  • See the Bitness value in the following registry hive: 

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\15.0\Outlook

    where 15.0 is the version of Outlook currently installed on the PC.

    Also you can check out the bitness of the current process where the code is run if you develop an add-in.
    Saturday, June 28, 2014 3:55 PM
  • Hi,

    Please take a look at:

    Detect If Office 2010 is 64bit or 32bit

    Hope this helps.


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    Monday, June 30, 2014 6:33 AM
    Moderator
  • See the Bitness value in the following registry hive: 

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\15.0\Outlook

    where 15.0 is the version of Outlook currently installed on the PC.

    Also you can check out the bitness of the current process where the code is run if you develop an add-in.

    To access the registry as a 32bit app, I think I should first

    read the key without the KEY_WOW64_64KEY flag

    and if the registry key cannot be found, then I should try to re-read with  KEY_WOW64_64KEY flag, is that correct?

    Sunday, July 6, 2014 4:39 PM