Re: [PATCH v3 0/2] MR8702: user32/tests: Add more SendMessageCallbackA/W() tests with NULL callback.

[Dmitry Timoshkov (＠dmitry)]

On Mon Aug  4 09:45:22 2025 +0000, Dmitry Timoshkov wrote:
> Doesn't that mean that the proposed solution is not fully correct? At
> least Windows behaviour would need some additional investigation I'd guess.

Does replacing WM_USER by WM_NULL change the observed behaviour under Windows?