Sorry forgot to post new working code for future beginners like myself !

Qt Code: 
  1. ****************************************************************************/
  2.  
  3. #ifndef FORM1_H
  4. #define FORM1_H
  5.  
  6. #include <qdialog.h>
  7. #include <qtimer.h>
  8.  
  11.  
  12. class Form1 : public QDialog
  13. {
  14.     Q_OBJECT
  15.  
  16. public:
  17.         Form1( QWidget* parent = 0, const char* name = 0, bool modal = FALSE, WFlags fl = 0 );
  18.         ~Form1();
  19.  
  21.         QTimer timer;
  22.  
  23. protected slots:
  24.         void myiter();
  25. };
  26.  
  27. #endif // FORM1_H
  28.  
  29. ****************************************************************************/
  30.  
  31. #include "form1.h"
  32. #include <qprogressbar.h>
  33. #include <qtimer.h>
  34.  
  35. Form1::Form1( QWidget* parent, const char* name, bool modal, WFlags fl ) : QDialog( parent, name, modal, fl )
  36. {
  37.         pb = new QProgressBar( this );
  38.         pb->setGeometry( QRect( 0, 0, 500, 30 ) );
  39.         pb->setTotalSteps( 10 );
  40.         pb->reset();
  41.  
  42.         connect( &timer, SIGNAL( timeout() ), this, SLOT( myiter() ) );
  43.  
  44.         if ( !timer.isActive() ) { timer.start(400); } else { timer.stop(); }
  45. }
  46.  
  47. Form1::~Form1() {};
  48. void Form1::myiter() {
  49.         int i = pb->progress();
  50.         pb->setProgress( ++i );
  51.         if ( i == pb->totalSteps() )  { close(); }
  52. }
  53.  
  54. ****************************************************************************/
  55. #include <qapplication.h>
  56. #include "form1.h"
  57.  
  58. int main( int argc, char ** argv )
  59. {
  60.     QApplication a( argc, argv );
  61.     Form1 w;
  62.     w.show();
  63.     a.connect( &a, SIGNAL( lastWindowClosed() ), &a, SLOT( quit() ) );
  64.     return a.exec();
  65. }
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