#include <QtNetwork/qhostinfo.h>
#ifndef QHOSTINFO_H
class QHostInfo{
   /* Some contents are skipped to improve readability */
   public: enum HostInfoError{
      NoError = 0,
      HostNotFound = 1,
      UnknownError = 2,
   };
   /* ... */
};
#endif // QHOSTINFO_H