void MyMainWindow :: saveInputDataToFile( const QString& inputName, const Q_ULLONG& inputSize , QWidget* parent )
{
-------
// Parent = MyWizard ;

QFileDialog * obj = new QFileDialog ( parent , "", true ) ;

QString destFilePath = obj->getSaveFileName( QString::null, QString::Null, parent );
-------
}

[HTML]
This is the parent -child flow....
+--------------------------+
| MyMainWindow |
+----------^--------------+
|
+---------------------------+
| MyWizard |
+-----------^--------------+
|
+--------------------------+
| QFileDialog |
+--------------------------+
[/HTML]