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Editorial Team
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Asked: 2026-05-18T12:36:09+00:00

I developed an office add in and a setup application, but after I install

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I developed an office add in and a setup application, but after I install it on my computer, and then I uninstall it, it seems everything is OK.

But when I want to reinstall it, I always get nothing. It seems there are some information retained in the registry. Is there any tools can help me to find them out and solve this problem ?

By the way, I used vsto | local to install my office add in.
And I have completed all the added registry in my uninstaller, but seems not work

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1 Answer

  1. Editorial Team

    Rather than programmatically trying to uninstall, do it the old fashioned way. Remove the add-in via office, let it remove the keys and such, and then try again.

    I believe an add-in is saved to:

    • HKEY_CLASSES_ROOT\CLSID{guid}\addin-name\keys
    • HKEY_CLASSES_ROOT\addinName
    • HKEY_LOCAL_MACHINE\Software\Microsoft\Office\product\Addins\addinName (all users entry)
    • HKEY_CURRENT_USER\Software\Microsoft\Office\product\Addins\addinName (current user entry)

    and, depending on the system, the Wow6432Node as well under HKLM &/or HKCU

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