waveOut Problems

I'm trying to create a simple loobback between the microphone, then send it to the soundcard. I was successfully able to get data from the soundcard, but once I do waveOutWrite, I get error code 33, and I don't know what that means. I searched all over the winmm.h file, and I don't see anywhere error 33. What am I doing wrong?

Here's code:

Code:

---

#include <windows.h>
#include <mmsystem.h>
#include <stdio.h>

#pragma comment (lib, "winmm.lib")

HWAVEIN WaveInHandle;
HWAVEOUT WaveOutHandle;

WAVEHDR WaveHeader;

WAVEFORMATEX WaveFormat;

int err;

void CALLBACK waveOutProc(HWAVEOUT WaveOutHandle, UINT uMsg, DWORD dwInstance, DWORD
                                                  dwParam1, DWORD dwParam2)
{
        if(uMsg == WOM_DONE)
        {
                printf("Successfully written sound!!\n");
        }

        if(uMsg == WOM_OPEN)
        {
                printf("WaveOut Opened....\n");
        }

        if(uMsg == WOM_CLOSE)
        {
                printf("WaveOut closed!!\n");
        }
}

void CALLBACK waveInProc(HWAVEIN WaveInHandle, UINT uMsg, DWORD dwInstance, DWORD
dwParam1, DWORD dwParam2)
{
        if (uMsg == WIM_DATA)
        {
                printf("Got some data\n");
                if ((waveInAddBuffer(WaveInHandle, &WaveHeader, sizeof(WaveHeader))))
                {
                        printf("Error while adding the buffer again...\n");
                }
               
                // error 33....
                err = waveOutWrite(WaveOutHandle,&WaveHeader,sizeof(WaveHeader));
               
                        if(err != MMSYSERR_NOERROR)
                        {
                                printf("Error playing back data!\n");
                        }
               
        }
       
        if (uMsg == WIM_OPEN)
        {
                printf("Device opened...\n");
        }

        if (uMsg == WIM_CLOSE)
        {
                printf("Device closed...\n");
        }
}


int main()
{

int intBufferSize = 44100;

WaveFormat.nSamplesPerSec = 22050;
WaveFormat.nChannels = 1;
WaveFormat.wBitsPerSample = 16;
WaveFormat.wFormatTag = WAVE_FORMAT_PCM;
WaveFormat.nBlockAlign = WaveFormat.nChannels * (WaveFormat.wBitsPerSample/8);
WaveFormat.nAvgBytesPerSec = WaveFormat.nSamplesPerSec * WaveFormat.nBlockAlign;
WaveFormat.cbSize = 0;

WaveHeader.dwBufferLength = intBufferSize;
WaveHeader.lpData = (char *)VirtualAlloc(0, intBufferSize, MEM_COMMIT, PAGE_READWRITE);
WaveHeader.dwFlags = 0;
WaveHeader.dwLoops = 0;
WaveHeader.lpNext = 0;

if ((err = waveInOpen(&WaveInHandle, WAVE_MAPPER,
&WaveFormat, (DWORD)&waveInProc, 0, CALLBACK_FUNCTION)))
{
        printf("Error opening the device!\n");
}

                if ((waveInPrepareHeader(WaveInHandle, &WaveHeader, sizeof(WaveHeader))))
                {
                        printf("Error while preparing header!\n");
                }

if((err = waveOutOpen(&WaveOutHandle,WAVE_MAPPER,&WaveFormat,(DWORD)&waveOutProc,0,CALLBACK_FUNCTION)) != MMSYSERR_NOERROR)
{
        printf("Error opening WaveOut!");
}

if((err = waveOutPrepareHeader(WaveOutHandle,&WaveHeader,sizeof(WaveHeader))))
{
        printf("Error while preparing waveOut Header");
}

if ((waveInAddBuffer(WaveInHandle, &WaveHeader, sizeof(WaveHeader))))
{
        printf("Error while adding buffer to queue!\n");
}

waveInStart(WaveInHandle);

getchar();

waveInClose(WaveInHandle);
printf("Device closed...\n\n\n");

return 0;

}

---

*bump*

33 means another program has locked a part of the file(may be something else),you process cant access it
the visual studio has a small tool to search the error messages by it's code ,y may find it in the vc program's entry,
btw,in my computer ,it's name is errlook.exe

I do lock memory for lpWave data, but thats the only way I was ever successful to read microphone data. Otherwise it won't work...What should I do?