Как создать в проекте вторую форму(в QtDesigner)

#ifndef FORM2_H
#define FORM2_H
#include <QtGui/QWidget>
#include "ui_form2.h"
#include "ui_untitled.h"
#include "qet.h"
 
namespace Ui{
class form2;
}
class form2 : public QWidget
{
Q_OBJECT
 public:
  explicit form2(QWidget *parent=0);
          ~form2(); 
 private:
  Ui::form2 *ui;
 public slots:
 void on_pushButton_clicked();
};
 
#endif

#include "form2.h"
 
form2::form2(QWidget *parent):QWidget(parent),
      ui(new Ui::form2)
{
 ui->setupUi(this);
}
//------------------------------------------
void form2::on_pushButton_clicked()
{
 ui->label->setText("hello");
}
form2::~form2()
{
delete ui;
}

void qet::on_pushButton_clicked()
{
 form2 *form=new form2;
 form->show();
}

######################################################################
# Automatically generated by qmake (2.01a) Wed Apr 11 20:06:42 2012
######################################################################
 
TEMPLATE = app
TARGET = 
DEPENDPATH += .
INCLUDEPATH += .
 
# Input
HEADERS += qet.h form2.h
FORMS += untitled.ui form2.ui
SOURCES += main.cpp qet.cpp
RESOURCES += resources.qrc