Programming with LEADTOOLS Multimedia > How To > Unlock Support for DVD Conversions

Unlock Support for DVD Conversions

This example shows how to use the ltmmSupportManager object to unlock support for DVD conversions.

HRESULT ConvertDVDUnlockSupport() 
{ 
   VARIANT_BOOL vb;  
   IltmmSupportManager* pSprtMngr;  
 
   HRESULT hr = CoCreateInstance(CLSID_ltmmSupportManager, NULL, CLSCTX_INPROC_SERVER, IID_IltmmSupportManager, (void**)&pSprtMngr);  
   if (hr != S_OK)  
      return -1;  
 
   pSprtMngr->IsSupportLocked(L_SUPPORT_CONVERTFROMDVD, &vb);  
 
   if (vb == VARIANT_TRUE)  
   { 
      static TCHAR L_KEY_CONVERTFROMDVD[] = TEXT("DVDKey"); 
      USES_CONVERSION;  
 
      hr = pSprtMngr->UnlockSupport(L_SUPPORT_CONVERTFROMDVD, T2OLE(L_KEY_CONVERTFROMDVD));  
 
      if (hr != S_OK)  
      { 
         pSprtMngr->Release(); 
         return hr;  
      } 
 
      pSprtMngr->IsSupportLocked(L_SUPPORT_CONVERTFROMDVD, &vb);  
 
      if (vb != VARIANT_FALSE)  
         return E_FAIL;  
 
      return S_OK;  
   } 
 
   return S_OK;  
}