Intercept messages from USB auxiliary device

[Gintaras]

I'm not familiar with usage pages, therefore I asked AI. It recommended to try `usUsage` = 1, 2, 3 ... until maybe it will work.

See also `RAWINPUTDEVICE` documentation. Try flag `RIDEV_PAGEONLY` (0x20).

C# code:

Copy

    usUsagePage = 1, usUsage = 0,
    dwFlags = api.RIDEV_INPUTSINK | 0x20,


But then, if usUsagePage = 1, you'll receive WM_INPUT for all keyboards, mice, etc, and will need to filter out unwanted notifications in _WmInput.