The behavior of the SetWindowDisplayAffinity API differs depending on the Windows 10 build version. API: SetWindowDisplayAffinity(hwnd, WDA_MONITOR); Windows 10 1909 (18363.418): Works correctly; when my dialog is captured, it turns black. Windows 10 2004 (19041.1): My dialog is rendered as transparent (it should ideally turn black). Windows 10 21H2: Behaves the same as version 1909. Updating the OS is not a solution for me, as my clients are not allowed to update Windows. Is there a way to resolve this without updating the OS?

The behavior of the SetWindowDisplayAffinity API differs depending on the Windows 10 build version.

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The behavior of the SetWindowDisplayAffinity API differs depending on the Windows 10 build version.

API: SetWindowDisplayAffinity(hwnd, WDA_MONITOR);

Windows 10 1909 (18363.418): Works correctly; when my dialog is captured, it turns black.
Windows 10 2004 (19041.1): My dialog is rendered as transparent (it should ideally turn black).
Windows 10 21H2: Behaves the same as version 1909.

Updating the OS is not a solution for me, as my clients are not allowed to update Windows. Is there a way to resolve this without updating the OS?

Viorel 118.4K Reputation points

2024-11-07T07:57:13.9333333+00:00

Maybe the clients are comfortable with observed behaviour?
Jeanine Zhang-MSFT 9,866 Reputation points Microsoft Vendor

2024-11-07T08:05:02.7233333+00:00

According to your description, it seems that this issue on the 2004 version has been fixed on the 21H2 version.

The only current solution is to update the operating system. If you do not want to update Windows, you could post the issue in the Feedback Hub.