Windows System licensed or not？

bool IsWindowsGenuine()
{
GUID uid;
RPC_WSTR rpc=(RPC_WSTR)_T("55c92734-d682-4d71-983e-d6ec3f16059f");
UuidFromString(rpc,&uid);
SL_GENUINE_STATE state;
SLIsGenuineLocal(&uid,&state,NULL);

if(state==SL_GENUINE_STATE::SL_GEN_STATE_IS_GENUINE)
return true;
return false;
}