yesterday example
Qt Code: 
  1. #include <QTimer>
  2. #include <QApplication>
  3.  
  4. class MyProcessEventDispatcher: public QObject
  5. {
  6.     Q_OBJECT
  7.  
  8. public:
  9.        MyProcessEventDispatcher(QObject *parent = 0) 
  10.           : QObject (parent) 
  11.         {
  12. 				connect(&m_timer, SIGNAL(timeout()), SLOT(updateEvents()));
  13.                 m_timer.setInterval(100);                
  14.                 m_timer.start();
  15.        }
  16.  
  17. private slots:
  18.       void updateEvents() 
  19.       {
  20.             m_timer.start();
  21.             qApp->processEvents();
  22.        }
  23.  
  24. private:
  25. 	QTimer m_timer;		
  26. };
  27. #include "main.moc" 
  28. int main(int argc, char **argv)
  29. {
  30.       QApplication app(argc, argv);
  31.       MyProcessEventDispatcher mpee;
  32.       //...  
  33.       return app.exec();
  34. }
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add this code to yours main.cpp, clean your project and then call qmake. now, when you start compilation main.com will be generated.