Programming with LEADTOOLS Multimedia > C Code > Adding Windows Media Support to the ltmmCapture Object for C

Adding Windows Media Support to the ltmmCapture Object for C

The following code demonstrates how to add Windows Media support to the ltmmCapture Object.

// declare the windows media certificate creation function 
HRESULT STDMETHODCALLTYPE WMCreateCertificate( IUnknown** pUnkCert ); 
// link to the stub library 
#pragma comment(lib, "wmstub.lib") 
void AddWindowsMediaSupportCaptureObjectExample ( void ) 
{ 
   HRESULT hr; 
   IltmmCapture* pCapture = NULL; 
   IUnknown* punkCert = NULL; 
   // initialize the COM library 
   hr = CoInitialize(NULL); 
   if(FAILED(hr)) 
      goto error; 
   // create the capture object 
   hr = CoCreateInstance(&CLSID_ltmmCapture, NULL, CLSCTX_INPROC_SERVER, &IID_IltmmCapture, (void**) &pCapture); 
   if(FAILED(hr)) 
      goto error; 
   // create a windows media certificate 
   hr = WMCreateCertificate(&punkCert); 
   if(SUCCEEDED(hr)) 
   { 
      // assign the certificate to the capture object 
      IltmmCapture_put_WMCertificate (pCapture, punkCert); 
      IUnknown_Release(punkCert); 
   } 
   error: // clean up 
   if(pCapture) 
      IUnknown_Release(pCapture); 
   CoUninitialize(); 
}