.NET
Microsoft Technologies based on the .NET software framework.
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Win11 - User32.GetRawInputData fails to read data since 24H2
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(259.20000000000005, 40%, 35%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EVT%3C/text%3E%3C/svg%3E)
Vít H
0
Reputation points
Background:
We are using HwndHost class to host child window inside WPF application. From WndProc method we are forwarding input messages (WM_INPUT) to child process/window using User32.SendMessage. The child process/window WndProc method then receives the message and reads from it using User32.GetRawInputData.
I can confirm it works fine in Win10 and Win11 23H2.
Since 24H2 the GetRawInputData method from user32.dll is not able to read data(lParam) from forwarded WM_INPUT message from parent window/process.
returned result is -1 and lastWin32Error is set to 6 - invalid handle.
.NET
Windows Presentation Foundation
Windows Presentation Foundation
A part of the .NET Framework that provides a unified programming model for building line-of-business desktop applications on Windows.
2,853 questions
Windows 11
Windows 11
A Microsoft operating system designed for productivity, creativity, and ease of use.
11,495 questions
{count} votes
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(246.4, 86%, 33%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EDL%3C/text%3E%3C/svg%3E)
David Lowndes 2,615 Reputation points MVP2025-01-28T16:59:29.51+00:00 A simple (as possible) repro project would be needed so that you can report the issue to MS.
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Viorel 121.6K Reputation points2025-01-28T17:00:11.13+00:00 It seems that the implementation should be fixed. It must not rely on features discovered through experiments. The raw data probably can be got in WndProc and then sent to child process. Or maybe the child process can be converted to a DLL or Class Library.
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Vít H 0 Reputation points
2025-01-28T17:36:53.29+00:00 edit: link to dropbox with repro
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David Lowndes 2,615 Reputation points MVP
2025-01-28T18:19:03.47+00:00 OK, I can reproduce what you say: All OK with Win10 & 11 (23H2 at least), problem occurs on Win 11 24H2 (I tried Win11 24H2 on ARM). Unless someone here can see any issue with your code (I can't), you'll probably need to report this to MS using paid support - though you shouldn't have to pay if it's a bug.
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Viorel 121.6K Reputation points
2025-01-28T18:59:53.6866667+00:00 If RegisterRawInputDevices is called inside the child process (which is therefore entitled to perform GetRawInputData) and is removed from main process, then your sample seems to work better.
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(236.8, 99%, 32%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EDT%3C/text%3E%3C/svg%3E)
Dan Thompson (SBS) 0 Reputation points Microsoft Employee2025-02-13T20:14:14.9066667+00:00 Those of you who are hitting the problem: what apps are having this problem? Trying to figure out magnitude of impact of this problem.
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(259.20000000000005, 75%, 35%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EA%3C/text%3E%3C/svg%3E)
현성 김 0 Reputation points2025-04-03T06:35:32.8766667+00:00 I’m having a similar issue on Windows 11 24H2 (26100.3194, 26100.3624). It works successfully on 23H2, but fails on 24H2.
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