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; 
}