sender.h Example File

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 #ifndef SENDER_H
 #define SENDER_H

 #include <QDialog>
 #include <QHostAddress>

 class QDialogButtonBox;
 class QLabel;
 class QPushButton;
 class QTimer;
 class QUdpSocket;
 class QSpinBox;

 class Sender : public QDialog
 {
     Q_OBJECT

 public:
     Sender(QWidget *parent = 0);

 private slots:
     void ttlChanged(int newTtl);
     void startSending();
     void sendDatagram();

 private:
     QLabel *statusLabel;
     QLabel *ttlLabel;
     QSpinBox *ttlSpinBox;
     QPushButton *startButton;
     QPushButton *quitButton;
     QDialogButtonBox *buttonBox;
     QUdpSocket *udpSocket;
     QTimer *timer;
     QHostAddress groupAddress;
     int messageNo;
 };

 #endif