How to get HRESULT of Win32::Networking::ActiveDirectory::IDirectorySearch::GetNextRow?

[rinfield]

I apologize if I'm asking a silly question.

I need the HRESULT to check whether more rows are available to search ActiveDirectory using Win32::Networking::ActiveDirectory::IDirectorySearch.

• C++ example
• ADSI Error Codes

How can I get actual HRESULT from Result<()>?
It seems executing GetNextRow() always returns Ok(()) even when no more rows.

https://microsoft.github.io/windows-docs-rs/doc/windows/Win32/Networking/ActiveDirectory/struct.IDirectorySearch.html#method.GetNextRow

[tim-weis]

This is the result of an issue with the Win32 metadata, that fails to contain enough information for windows-rs to provide a useful binding. The issue was initially reported here. Since then some API's (but not all) have received the proposed AlternateSuccessCodes attribute (such as DoDragDrop). Unfortunately, IDirectorySearch::GetNextRow is not one of them.

As I understand it, the AlternateSuccessCodes attribute is in the process of getting replaced with DllImport.PreserveSig (see this PR for reference). It doesn't look like the Win32 metadata team is planning to invest into the temporary AlternateSuccessCodes solution.

The maintainers of windows-rs may want to bring this to the attention of the Win32 metadata team, and possibly prioritize having the issue resolved. At this time, this specific API is rendered unusable.

[rinfield]

Thank you for your explanation! I'll wait for the progress of win32metadata and windows-rs.:+1:

💭 (If it takes a long time, I wish win32metadata teams accept AlternateSuccessCodes solution first...)

[dqtsth]

Hi. I am blocked by issue. You can accept my solution AlternateSuccessCodes for now and later do solution better? Sorry for impatience I can not finish my project. Thank you for work and windows-rs. 👍

[rinfield]

With 0.29.0, I can now get HRESULT as return type. I have confirmed that the actual implementation and documentation have been fixed.

Thank you!