//
//My Callback Function
//
int CALLBACK VoiceWaveOutProc(HWAVEOUT hwo, UINT uMsg, DWORD dwInstance, DWORD dwParam1, DWORD dwParam2)
{
	//this message can be sent if a buffer is sent back, or if the stop button was pressed
 	if (uMsg == WOM_DONE)
	{
		//get a pointer to the instance of CSound
		CSound* pCSound = reinterpret_cast<CSound*>((DWORD_PTR)dwInstance);
		unsigned long result;

		char *Buffer;
		//get the number of the buffer returned
		int nBufferReturned = 0;
		
		for (int x = 0; x < NBUFFERS; x++)
		{
			if (dwParam1 == (DWORD_PTR)&pCSound->WaveHeader[x])
			{
				nBufferReturned = x;
				Buffer = pCSound->Buffer[x];
				if (x!= NBUFFERS-1)
					pCSound->CurrentBuffer = pCSound->Buffer[x+1];
				else
					pCSound->CurrentBuffer = pCSound->Buffer[0];
			}
		}


		//if we aren't playing, return
		if (pCSound->iAction == -1)
		{
			char TempChar[512];
			sprintf(TempChar,"Buffer %i returned for clearing\n",nBufferReturned);
			OutputDebugString(TempChar);

//CRASHES RIGHT HERE, the first time it is called
			result = waveOutUnprepareHeader(pCSound->outHandle, pCSound->WaveHeader[nBufferReturned], sizeof(WAVEHDR));
			if(result) return 1;

			for (int i = 0; i < (int)pCSound->m_dwLength; i++)
				Buffer = NULL;
			return 0;
		}
//...
}
}

//Play Function
int CSound::Play()
{
	if (iAction == 2)
	{
		waveOutRestart(outHandle);
		iAction = 0;
		return 0;
	}
	
	for (int x = 0; x < NBUFFERS; x++)
		for (int i = 0; i < (int)m_dwLength; i++)
			Buffer[x] = 0;

	PlayOffset = 0;

	FILE *fp = fopen(CurFile,"rb");
	fseek(fp,0,SEEK_END);
	PlaySize = (int)ftell(fp);
	fseek(fp,0,SEEK_SET);
	if (PlaySize == 0)
	{
		fclose(fp);
		PlayDone();
		return 0;
	}

	unsigned long result;
	
	for (int x = 0; x < NBUFFERS; x++)
	{
		fread(Buffer[x],sizeof(char),(int)m_dwLength,fp);
		PlayOffset+=1;

		WaveHeader[x].lpData = Buffer[x];
		WaveHeader[x].dwBufferLength=m_dwLength;
		WaveHeader[x].dwBytesRecorded=0;
		WaveHeader[x].dwUser=0;
		WaveHeader[x].dwFlags=0;
		WaveHeader[x].reserved=0;
		WaveHeader[x].lpNext=0;

		result = waveOutPrepareHeader(outHandle,&WaveHeader[x],sizeof(WAVEHDR));
		if(result) return 1;

		result = waveOutWrite(outHandle,&WaveHeader[x],sizeof(WAVEHDR));
		if(result) return 1;
	}

	fclose(fp);
	
	iAction = 0;

	CurrentBuffer = Buffer[0];

	return 0;
}

//Stop Function
//...
iAction = -1;
result = waveOutReset(outHandle);
//...

//Additional Info

#define NBUFFERS 16

//in class
WAVEHDR WaveHeader[NBUFFERS];
WAVEFORMATEX waveFormat;
char* Buffer[NBUFFERS];

//Initialization
for (int x = 0; x < NBUFFERS; x++)
{
	Buffer[x] = new char[m_dwLength];
	for (int i = 0; i < (int)m_dwLength; i++)
		Buffer[x] = 0;
}

int CSound::Play(){	if (iAction == 2)	{		waveOutRestart(outHandle);		iAction = 0;		return 0;	}		for (int x = 0; x < NBUFFERS; x++)		for (int i = 0; i < (int)m_dwLength; i++)			Buffer[x] = 0;	PlayOffset = 0;	FILE *fp = fopen(CurFile,"rb");	fseek(fp,0,SEEK_END);	PlaySize = (int)ftell(fp);	fseek(fp,0,SEEK_SET);	if (PlaySize == 0)	{		fclose(fp);		PlayDone();		return 0;	}	unsigned long result;		for (int x = 0; x < NBUFFERS; x++)	{		fread(Buffer[x],sizeof(char),(int)m_dwLength,fp);		PlayOffset+=1;		WaveHeader[x].lpData = Buffer[x];		WaveHeader[x].dwBufferLength=m_dwLength;		WaveHeader[x].dwBytesRecorded=0;		WaveHeader[x].dwUser=0;		WaveHeader[x].dwFlags=0;		WaveHeader[x].reserved=0;		WaveHeader[x].lpNext=0;		result = waveOutPrepareHeader(outHandle,&(WaveHeader[x]),sizeof(WAVEHDR));		if(result) return 1;		result = waveOutWrite(outHandle,&WaveHeader[x],sizeof(WAVEHDR));		if(result) return 1;	}	fclose(fp);		iAction = 0;	CurrentBuffer = Buffer[0];	return 0;}int CALLBACK VoiceWaveOutProc(HWAVEOUT hwo, UINT uMsg, DWORD dwInstance, DWORD dwParam1, DWORD dwParam2){	OutputDebugString("CallBack Called\n");	//this message can be sent if a buffer is sent back, or if the stop button was pressed 	if (uMsg == WOM_DONE)	{		OutputDebugString("WOM_DONE Message Called\n");		//get a pointer to the instance of CSound		CSound* pCSound = reinterpret_cast<CSound*>((DWORD_PTR)dwInstance);		unsigned long result;		OutputDebugString("About to Return if pCSound->iAction == -1\n");		if (pCSound->iAction == -1) return 0;                //the rest should be irrelevant, if it didn't return, I just fill the buffer with more data and send it back to the driver, I know it works, it never crashes on Play        }}//if stop is called and it is playing:OutputDebugString("About to Call WaveOutReset\n");iAction = -1;//THIS IS WHAT CRASHES WHEN THE PROGRAM FREEZES, IT NEVER CALLS THE CALLBACK WHEN IT FREEZESwaveOutReset(outHandle);for (int x = 0; x < NBUFFERS; x++){		result = waveOutUnprepareHeader(outHandle,&(WaveHeader[x]), sizeof(WAVEHDR));		if(result) return 1;	for (int i = 0; i < (int)m_dwLength; i++)		Buffer[x] = NULL;}//Additional Info#define NBUFFERS 16//in classWAVEHDR WaveHeader[NBUFFERS];WAVEFORMATEX waveFormat;char* Buffer[NBUFFERS];//Initializationfor (int x = 0; x < NBUFFERS; x++){	Buffer[x] = new char[m_dwLength];	for (int i = 0; i < (int)m_dwLength; i++)		Buffer[x] = 0;}