Problem to stream grabbed audio sample to Audio renderer

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C++

directshow

audio

I am a newbie in directshow. I have written a program to take sample audio from microphone into a buffer using ISampleGrabber.

void MICDetect::Run_Graph(IMediaControl* m_pControl)
{
    m_hr = m_pControl->Run();// Now run the graph, i.e. start listening!
    if(SUCCEEDED(m_hr))
        {
            cout<<"Graph is Running"<<endl;
        }
    else HR_Failed(m_hr);
    cout<<"Waiting for buffer";
    for(int i=5;i>=1;--i)
    {
        Sleep(500);
        cout<<".";
    }
    cout<<endl;
    m_hr = m_pGrabber->GetCurrentBuffer(&m_Size, NULL);
    if(FAILED(m_hr))
    {
        HR_Failed(m_hr);
    }
     pBuffer = (BYTE*)CoTaskMemAlloc(m_Size);
    if (!pBuffer)
    {
        m_hr = E_OUTOFMEMORY;
        HR_Failed(m_hr);
    }
    for(int i=1000000;i>1;i--)
    {
        Sleep(1);
    m_hr = m_pGrabber->GetCurrentBuffer(&m_Size, (long*)pBuffer);
    if (FAILED(m_hr))
    {
        HR_Failed(m_hr);
    }
    
    }
system("pause");
}

Since I need a sample of 1000 samples per sec for start I pause getcurrentbuffer for 1ms and loop it. I'm not sure of this method. The only way for me to be sure is to stream the grabbed sample to an audio render.

How am i supposed to do that?