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AddIn help


Info on AddIn help.


Firstly, I highly recommend the tool AddInSpy. This tool will detect the

COM AddIn's prerequisites and loading errors. Please download it from,


It has a friendly WPF GUI that can report every AddIn's status. For more

information, please read,


As to the issue itself, since the AddIn does not appear in the COM AddIn

Dialog, it looks like a COM registry issue to me. So my guess is correct,

we can use Process Monitor to listen to the msiexec's registry actions

during the installing. Then we may find some useful information to narrow

down the problem.

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