IErrorInfo in C #

Question

There is C ++ COM. And that sometimes challenges SomeMethod() . C ++ Com supports ISupportErrorInfo and populates IErrorInfo . How can I get IErrorInfo.Description in C #?

This code catches the error, but there is no cpp message in it.

 try { COM.SomeMethod() } catch (COMException exn) { string ACppErrorMessage = exn.message; outputError(ACppErrorMessage); } 

Answer 1

According to the documentation, the Description IErrorInfo field displays exceptions in the Message object if HRESULT contains this information, otherwise it is simply filled with default values.

If Message empty, I can only assume that the information is not returned from HRESULT .