Function winmm::waveOutOpen

pub unsafe extern "system" fn waveOutOpen(
    phwo: LPHWAVEOUT, 
    uDeviceID: UINT, 
    pwfx: LPCWAVEFORMATEX, 
    dwCallback: DWORD_PTR, 
    dwInstance: DWORD_PTR, 
    fdwOpen: DWORD
) -> MMRESULT