IGraphBuilder *pigb = NULL;
IMediaControl *pimc = NULL;
IMediaEventEx *pimex = NULL;
IVideoWindow *pivw = NULL;
IMediaSeeking *pims = NULL;
ICaptureGraphBuilder2 * g_pCaptureBuilder = NULL;
IBaseFilter *pF = 0;
void CTestFilterDlg::OnButton4()
{
// TODO: Add your control notification handler code here
CoInitialize(NULL);
HRESULT hr = CoCreateInstance(CLSID_FilterGraph,
NULL,
CLSCTX_INPROC_SERVER,
IID_IGraphBuilder,
(void