Programming with LEADTOOLS Multimedia > C++ Code > IltmmSupportManager::UnlockSupport Example for C++

IltmmSupportManager::UnlockSupport Example for C++

HRESULT DVDUnlockSupport() 
{ 
   VARIANT_BOOL vb;  
   IltmmSupportManager* pSupportMgr;  
 
   // try to create the support manager interface 
   HRESULT hr = CoCreateInstance(CLSID_ltmmSupportManager, NULL, CLSCTX_INPROC_SERVER, IID_IltmmSupportManager, (void**)&pSupportMgr);  
   if (hr != S_OK)  
      return -1;  
 
   // check if support is locked 
   pSupportMgr->IsSupportLocked(L_SUPPORT_CONVERTFROMDVD, &vb);  
   if (vb == VARIANT_TRUE)  
   { 
      // use your unlock key here 
      static TCHAR L_KEY_CONVERTFROMDVD[] = L"DVDKey"; 
 
      USES_CONVERSION;  
 
      // try to unlock support 
      hr = pSupportMgr->UnlockSupport(L_SUPPORT_CONVERTFROMDVD, T2OLE(L_KEY_CONVERTFROMDVD));  
      if (hr != S_OK)  
      { 
         // release the support manager object 
         pSupportMgr->Release(); 
         return hr;  
      } 
 
      // check again to see if it is unlocked now 
      pSupportMgr->IsSupportLocked(L_SUPPORT_CONVERTFROMDVD, &vb);  
      if (vb != VARIANT_FALSE)  
      { 
         // release the support manager object 
         pSupportMgr->Release(); 
         return E_FAIL;  
      } 
   } 
 
   // release the support manager object 
   pSupportMgr->Release(); 
 
   return S_OK;  
}