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

IltmmSupportManager::UnlockSupport Example for C

LPOLESTR T2OLE(LPCTSTR lpt) 
{ 
   static OLECHAR lpw[512]; 
   if(!lpt) 
      return NULL; 
   lpw[0] = L'\0'; 
   MultiByteToWideChar(CP_ACP, 0, lpt, -1, lpw, 512); 
   return lpw; 
} 
HRESULT IltmmSupportManager_UnlockSupport_Example (IltmmSupportManager* pSprtMngr) 
{ 
   VARIANT_BOOL vb; 
   HRESULT hr = CoCreateInstance(&CLSID_ltmmSupportManager, NULL, CLSCTX_INPROC_SERVER, &IID_IltmmSupportManager, (void**)&pSprtMngr); 
   if (hr != S_OK) 
      return -1; 
   IltmmSupportManager_IsSupportLocked (pSprtMngr, L_SUPPORT_CONVERTFROMDVD, &vb); 
   if (vb == VARIANT_TRUE) 
   { 
      hr = IltmmSupportManager_UnlockSupport (pSprtMngr, L_SUPPORT_CONVERTFROMDVD, T2OLE("DVDKey")); 
      if (hr != S_OK) 
      { 
         IltmmSupportManager_Release(pSprtMngr); 
         return hr; 
      } 
      IltmmSupportManager_IsSupportLocked (pSprtMngr, L_SUPPORT_CONVERTFROMDVD, &vb); 
      if (vb != VARIANT_FALSE) 
         return E_FAIL; 
      return S_OK; 
   } 
   return S_OK; 
}