C / C++ / MFC

	LPHWAVEIN phWaveIn = NULL;
	WAVEFORMATEX pcmWaveFormat;
 
	::memset(&pcmWaveFormat, 0, sizeof(WAVEFORMATEX));
 
	pcmWaveFormat.wFormatTag = WAVE_FORMAT_PCM;
	pcmWaveFormat.nChannels = 1;
	pcmWaveFormat.nSamplesPerSec = 11025L;
	pcmWaveFormat.nAvgBytesPerSec = 11025L;
	pcmWaveFormat.nBlockAlign = 1;
	pcmWaveFormat.wBitsPerSample = 8;
	//pcmWaveFormat.cbSize = 0;

	MMRESULT rResult;
	rResult = IsFormatSupported(&pcmWaveFormat, WAVE_MAPPER);
	if(rResult != MMSYSERR_NOERROR) return;
 
	rResult = ::waveInOpen(phWaveIn, WAVE_MAPPER, &pcmWaveFormat, 0, 0, CALLBACK_NULL);
	if(rResult != MMSYSERR_NOERROR)
	{
		CString sErrorMsg;
 
		if(rResult == MMSYSERR_ALLOCATED)
			sErrorMsg = "Specified resource is already allocated.";
		else if(rResult == MMSYSERR_BADDEVICEID)
			sErrorMsg = "Specified device identifier is out of range.";
		else if(rResult == MMSYSERR_NODRIVER)
			sErrorMsg = "No device driver is present.";
		else if(rResult == MMSYSERR_NOMEM)
			sErrorMsg = "Unable to allocate or lock memory.";
		else if(rResult == WAVERR_BADFORMAT)
			sErrorMsg = "Attempted to open with an unsupported waveform-audio format.";
	
	}