microsoft / microsoft/CsWin32

The P/Invoke `GetWindowThreadProcessId()` doesn't have `SetLastError = true`.

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bug
Dominant language
C#
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Description

Actual behavior

This is likely a win32metadata issue, however the documentation for GetWindowThreadProcessId() says: To get extended error information, call GetLastError.

Expected behavior

That this P/Invoke correctly has SetLastError = true.

Repro steps

  1. NativeMethods.txt content:
GetWindowThreadProcessId
  1. NativeMethods.json content (if present): N/A

  2. Any of your own code that should be shared? N/A

Context
  • CsWin32 version: 0.3.264
  • Win32Metadata version (if explicitly set by project): N/A
  • Target Framework: net472
  • LangVersion (if explicitly set by project): N/A

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by tracing how the NativeMethods.txt entry for GetWindowThreadProcessId is resolved and how its P/Invoke declaration is generated; the issue suggests the relevant metadata may be in win32metadata. Confirm the generated declaration reflects the Windows documentation by setting SetLastError to true, then verify the generated output or relevant tests.

Written by the indexing model from the issue text.

Assessment

Tech stack
csharp
Domain
operating-systems, tooling
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
50/100

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