Documentation for Office Automation HRESULTs?

[Peter Kron]

I am working with Outlook via it's Automation interfaces using C++. I can't
find descriptions of some of the HRESULTs that get returned. Specifically,
trying to access the Explorer interface sometimes returns 0x9ac20009.

Anyone know where these are documented?

Thanks

 

[Peter Kron]

After more investigation, it seems that the codes are not documented. The
correct approach is to get the description using
GetErrorInfo and the IErrorInfo interface.