The following code demonstrates how to add Windows Media support to the ltmmConvert Object.
// declare the windows media certificate creation function
HRESULT STDMETHODCALLTYPE WMCreateCertificate( IUnknown** pUnkCert );
// link the stub library
#pragma comment(lib, "wmstub.lib")
void AddWindowsMediaSupportConvertObjectExample ( void )
{
HRESULT hr;
IltmmConvert* pConvert = NULL;
IUnknown* punkCert = NULL;
// initialize the COM library
hr = CoInitialize(NULL);
if(FAILED(hr))
goto error;
// create the convert object
hr = CoCreateInstance(&CLSID_ltmmConvert, NULL, CLSCTX_INPROC_SERVER, &IID_IltmmConvert, (void**) &pConvert);
if(FAILED(hr))
goto error;
// create a windows media certificate
hr = WMCreateCertificate(&punkCert);
if(SUCCEEDED(hr))
{
// assign the certificate to the convert object
IltmmConvert_put_WMCertificate (pConvert, punkCert);
IUnknown_Release(punkCert);
}
error:
// clean up
if(pConvert)
IUnknown_Release(pConvert);
CoUninitialize();
}
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