waveOutMessage does not return preferred audio device from Wave Mapper

#include <cstdio>

#include <windows.h>

#include <mmsystem.h>

int main(int argc, char** argv[]) {

    WCHAR pszWinMMErrText[MAXERRORLENGTH] = {0};

    DWORD dwWaveOutDeviceID;

    DWORD dw2;

    MMRESULT mmres = waveOutMessage((HWAVEOUT)WAVE_MAPPER, 0x2000 + 21, (DWORD_PTR)&dwWaveOutDeviceID, (DWORD_PTR)&dw2);

    if (mmres != MMSYSERR_NOERROR)

    {

        waveOutGetErrorTextW(mmres, pszWinMMErrText, _countof(pszWinMMErrText));

        printf("waveOutMessage failed: %lu (%S)\n", mmres, pszWinMMErrText);

    }

    if (dwWaveOutDeviceID == -1)

    {

        printf("No default output device was assigned, falling back to the first device\n");

    }

    return 0;

}