Hi,
I just did couple of changes in Fortune client examplelike
1. changed name enableGetfortune to enablebtnConnect.
2. Added a timer so as have socket connection automatically
the header is
Qt Code: 
  1. #ifndef CLIENT_H
  2. #define CLIENT_H
  3.  
  4. #include <QDialog>
  5. #include <QTcpSocket>
  6. #include<Qtimer>
  7.  
  8. QT_BEGIN_NAMESPACE
  10. class QLabel;
  11. class QLineEdit;
  13. class QTcpSocket;
  14. class QNetworkSession;
  15. QT_END_NAMESPACE
  16.  
  17. //! [0]
  18. class client : public QDialog
  19. {
  20.     Q_OBJECT
  21.  
  22. public:
  23.     client(QWidget *parent = 0);
  24.     QTimer *timer;
  25.  
  26. private:
  27.  
  28.     void requestNewFortune();
  29.     void readFortune();
  30.     void newconnect();
  31.     void displayError(QAbstractSocket::SocketError socketError);
  32.     void enablebtnConnect();
  33.     void sessionOpened();
  34.     QLabel *hostLabel;
  35.     QLabel *portLabel;
  36.     QLineEdit *hostLineEdit;
  37.     QLineEdit *portLineEdit;
  38.     QLabel *statusLabel;
  39.     QPushButton *btnConnect;
  40.     QPushButton *quitButton;
  41.     QDialogButtonBox *buttonBox;
  42.  
  43.     QTcpSocket *tcpSocket;
  44.     QString joyvalue;
  45.     quint16 blockSize;
  46.  
  47.     QNetworkSession *networkSession;
  48. };
  49. //! [0]
  50.  
  51. #endif
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and code is

Qt Code: 
  1. #include <QtGui>
  2. #include <QtNetwork>
  3.  
  4. #include "client.h"
  5.  
  6. //! [0]
  7. client::client(QWidget *parent):
  8.         QDialog(parent), networkSession(0)
  9. {
  10.     hostLabel = new QLabel(tr("&Server name:"));
  11.     portLabel = new QLabel(tr("S&erver port:"));
  12.  
  13.     // find out which IP to connect to
  14.     QString ipAddress;
  15.     QList<QHostAddress> ipAddressesList = QNetworkInterface::allAddresses();
  16.     // use the first non-localhost IPv4 address
  17.     for (int i = 0; i < ipAddressesList.size(); ++i) {
  18.         if (ipAddressesList.at(i) != QHostAddress::LocalHost &&
  19.             ipAddressesList.at(i).toIPv4Address()) {
  20.             ipAddress = ipAddressesList.at(i).toString();
  21.             break;
  22.         }
  23.     }
  24.     // if we did not find one, use IPv4 localhost
  25.     if (ipAddress.isEmpty())
  26.         ipAddress = QHostAddress(QHostAddress::LocalHost).toString();
  27.  
  28.     hostLineEdit = new QLineEdit(ipAddress);
  29.     portLineEdit = new QLineEdit;
  30.     portLineEdit->setValidator(new QIntValidator(1, 65535, this));
  31.  
  32.     hostLabel->setBuddy(hostLineEdit);
  33.     portLabel->setBuddy(portLineEdit);
  34.  
  35.     statusLabel = new QLabel(tr("Run Server as well"));
  36.  
  37.     btnConnect = new QPushButton(tr("Connect"));
  38.     btnConnect->setDefault(true);
  39.     btnConnect->setEnabled(false);
  40.  
  41.     quitButton = new QPushButton(tr("Quit"));
  42.  
  43.  
  44.     tcpSocket = new QTcpSocket(this);
  45.     connect(quitButton, SIGNAL(clicked()), this, SLOT(close()));
  46.  
  47.     connect(hostLineEdit, SIGNAL(textChanged(QString)),this, SLOT(enablebtnConnect()));
  48.     connect(portLineEdit, SIGNAL(textChanged(QString)),this, SLOT(enablebtnConnect()));
  49.     connect(btnConnect, SIGNAL(clicked()), this, SLOT(newconnect()));
  50.     connect(timer, SIGNAL(timeout()),this, SLOT(requestNewFortune()));
  51.     connect(tcpSocket, SIGNAL(readyRead()), this, SLOT(readFortune()));
  52.     connect(tcpSocket, SIGNAL(error(QAbstractSocket::SocketError)),this, SLOT(displayError(QAbstractSocket::SocketError)));
  53.  
  54.     QGridLayout *mainLayout = new QGridLayout;
  55.     mainLayout->addWidget(hostLabel, 0, 0);
  56.     mainLayout->addWidget(hostLineEdit, 0, 1);
  57.     mainLayout->addWidget(portLabel, 1, 0);
  58.     mainLayout->addWidget(portLineEdit, 1, 1);
  59.     mainLayout->addWidget(statusLabel, 2, 0, 1, 2);
  60.     mainLayout->addWidget(btnConnect, 3, 0);
  61.     mainLayout->addWidget(quitButton, 3, 1);
  62.     setLayout(mainLayout);
  63.  
  64.     setWindowTitle(tr("Fortune client"));
  65.     portLineEdit->setFocus();
  66.  
  67.     QNetworkConfigurationManager manager;
  68.     if (manager.capabilities() & QNetworkConfigurationManager::NetworkSessionRequired) {
  69.         // Get saved network configuration
  70.         QSettings settings(QSettings::UserScope, QLatin1String("Trolltech"));
  71.         settings.beginGroup(QLatin1String("QtNetwork"));
  72.         const QString id = settings.value(QLatin1String("DefaultNetworkConfiguration")).toString();
  73.         settings.endGroup();
  74.  
  75.         // If the saved network configuration is not currently discovered use the system default
  76.         QNetworkConfiguration config = manager.configurationFromIdentifier(id);
  77.         if ((config.state() & QNetworkConfiguration::Discovered) !=
  78.             QNetworkConfiguration::Discovered) {
  79.             config = manager.defaultConfiguration();
  80.         }
  81.  
  82.         networkSession = new QNetworkSession(config, this);
  83.         connect(networkSession, SIGNAL(opened()), this, SLOT(sessionOpened()));
  84.  
  85.         btnConnect->setEnabled(false);
  86.         statusLabel->setText(tr("Opening network session."));
  87.         networkSession->open();
  88.     }
  89. }
  90.  
  91.  
  92. void client::newconnect()
  93. {
  94.     timer->start();
  95.  
  96. }
  97.  
  98. void client::requestNewFortune()
  99. {
  100.     btnConnect->setEnabled(false);
  101.     blockSize = 0;
  102.     tcpSocket->abort();
  103.     tcpSocket->connectToHost(hostLineEdit->text(),
  104.                              portLineEdit->text().toInt());
  105. }
  106. void client::readFortune()
  107. {
  108. //! [9]
  109.     QDataStream in(tcpSocket);
  110.     in.setVersion(QDataStream::Qt_4_0);
  111.  
  112.     if (blockSize == 0) {
  113.         if (tcpSocket->bytesAvailable() < (int)sizeof(quint16))
  114.             return;
  115. //! [8]
  116.  
  117. //! [10]
  118.         in >> blockSize;
  119.     }
  120.  
  121.     if (tcpSocket->bytesAvailable() < blockSize)
  122.         return;
  123. //! [10] //! [11]
  124.  
  125.     QString nextFortune;
  126.     in >> nextFortune;
  127.  
  128.     if (nextFortune == joyvalue) {
  129.         QTimer::singleShot(0, this, SLOT(requestNewFortune()));
  130.         return;
  131.     }
  132. //! [11]
  133.  
  134. //! [12]
  135.     joyvalue = nextFortune;
  136. //! [9]
  137.     statusLabel->setText(joyvalue);
  138.     btnConnect->setEnabled(true);
  139. }
  140. void client::displayError(QAbstractSocket::SocketError socketError)
  141. {
  142.     switch (socketError) {
  143.     case QAbstractSocket::RemoteHostClosedError:
  144.         break;
  145.     case QAbstractSocket::HostNotFoundError:
  146.         QMessageBox::information(this, tr("Fortune client"),
  147.                                  tr("The host was not found. Please check the "
  148.                                     "host name and port settings."));
  149.         break;
  150.     case QAbstractSocket::ConnectionRefusedError:
  151.         QMessageBox::information(this, tr("Fortune client"),
  152.                                  tr("The connection was refused by the peer. "
  153.                                     "Make sure the fortune server is running, "
  154.                                     "and check that the host name and port "
  155.                                     "settings are correct."));
  156.         break;
  157.     default:
  158.         QMessageBox::information(this, tr("Fortune client"),
  159.                                  tr("The following error occurred: %1.")
  160.                                  .arg(tcpSocket->errorString()));
  161.     }
  162.  
  163.     btnConnect->setEnabled(true);
  164. }
  165.  
  166. void client::enablebtnConnect()
  167. {
  168.     btnConnect->setEnabled((!networkSession || networkSession->isOpen()) &&
  169.                                  !hostLineEdit->text().isEmpty() &&
  170.                                  !portLineEdit->text().isEmpty());
  171.  
  172.     btnConnect->setText("Connected");
  173.  
  174.  
  175. }
  176.  
  177. void client::sessionOpened()
  178. {
  179.     // Save the used configuration
  180.     QNetworkConfiguration config = networkSession->configuration();
  181.     QString id;
  182.     if (config.type() == QNetworkConfiguration::UserChoice)
  183.         id = networkSession->sessionProperty(QLatin1String("UserChoiceConfiguration")).toString();
  184.     else
  185.         id = config.identifier();
  186.  
  187.     QSettings settings(QSettings::UserScope, QLatin1String("Trolltech"));
  188.     settings.beginGroup(QLatin1String("QtNetwork"));
  189.     settings.setValue(QLatin1String("DefaultNetworkConfiguration"), id);
  190.     settings.endGroup();
  191.  
  192.     statusLabel->setText(tr("Run Server as well"));
  193.  
  194.     enablebtnConnect();
  195. }
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but is not showing me any output window nor any build issues.
Pls check it out.

Thanks
Arpit