Захват видео с web-камеры

// capture video.cpp: определяет точку входа для консольного приложения.
//
 
#include "stdafx.h"
#include <Windows.h>
#include <Dshow.h>
#include <ObjIdl.h>
#include <Strmif.h>
#include <Control.h>
#pragma comment(lib, "strmiids")
 
 
 
int _tmain(int argc, _TCHAR* argv[])
{
 
    IGraphBuilder *pGraph = NULL;
    ICaptureGraphBuilder2 *pBuild = NULL;
    IBaseFilter *pCap; //Video capture filter
    ICreateDevEnum *pDevEnum = NULL;
    IEnumMoniker *pEnum = NULL;
    IMoniker *pMoniker=NULL;
    IMediaControl *pControl = NULL;
    IMediaEvent   *pEvent = NULL;
 
    // Create the Capture Graph Builder.
    HRESULT hr = CoCreateInstance(CLSID_CaptureGraphBuilder2, NULL, 
        CLSCTX_INPROC_SERVER, IID_ICaptureGraphBuilder2, (void**)&pBuild );
    // Create the System Device Enumerator.
    hr = CoCreateInstance(CLSID_SystemDeviceEnum, NULL,
    CLSCTX_INPROC_SERVER, IID_ICreateDevEnum, 
    reinterpret_cast<void**>(&pDevEnum));
if (SUCCEEDED(hr))
{
    // Create an enumerator for the video capture category.
    hr = pDevEnum->CreateClassEnumerator(
        CLSID_VideoInputDeviceCategory,
        &pEnum, 0);
}
 
    if (hr==S_OK)
    {
        // Create the Filter Graph Manager.
        hr = CoCreateInstance(CLSID_FilterGraph, 0, CLSCTX_INPROC_SERVER,
            IID_IGraphBuilder, (void**)&pGraph);
        if (SUCCEEDED(hr))
        {
            // Initialize the Capture Graph Builder.
            hr = pGraph->QueryInterface(IID_IMediaControl, (void **)&pControl);
            hr = pGraph->QueryInterface(IID_IMediaEvent, (void **)&pEvent);
            pBuild->SetFiltergraph(pGraph);
            hr = pMoniker->BindToObject(NULL, NULL, IID_IBaseFilter,
                (void**)&pCap);
            // Now add the filter to the graph. 
            pGraph->AddFilter(pCap,L"Video Capture Filter");
            hr= pBuild->RenderStream(&PIN_CATEGORY_PREVIEW, &MEDIATYPE_Video, 
    pCap, NULL, NULL);
 
            return S_OK;
        }
        else
        {
            pBuild->Release();
            pMoniker->Release();
        }
    }
    return hr; // Failed
}