I'd like a MessageBox to display when I click a button on my simple PyQT application. How can I declare two textboxes and have a MessageBox display with the text from both textboxes?

Here's my code far:

```
import sys
from PyQt4 import QtGui, QtCore

class myWindow(QtGui.QWidget):
    def __init__(self, parent=None):
        QtGui.QWidget.__init__(self, parent)

        #The setGeometry method is used to position the control.
        #Order: X, Y position - Width, Height of control.
        self.setGeometry(300, 300, 500, 350)
        self.setWindowTitle("Sergio's QT Application.")
        self.setWindowIcon(QtGui.QIcon('menuScreenFolderShadow.png'))

        self.setToolTip('<i>Welcome</i> to the <b>first</b> app ever!')
        QtGui.QToolTip.setFont(QtGui.QFont('Helvetica', 12))

        txtFirstName = QtGui.?
        txtLastName = QtGui.?

        btnQuit = QtGui.QPushButton('Exit Application', self)
        btnQuit.setGeometry(340, 300, 150, 35)

        self.connect(btnQuit, QtCore.SIGNAL('clicked()'),
                    QtGui.qApp, QtCore.SLOT('quit()'))

app = QtGui.QApplication(sys.argv)
mainForm = myWindow()
mainForm.show()
sys.exit(app.exec_())

```