wxPySimpleApp does not use Tahoma on MS Windows

Hi!

Is it indended that when using code like this

   if __name__ == '__main__':
       app = wxPySimpleApp()
       frame = MyFrame(None, -1)
       frame.Show(true)
       app.MainLoop()

the font used by the application is not the default system font, but when using instead code like this

   class MyApp(wxApp):
       def OnInit(self):
           frame = MyFrame(None, -1)
           frame.Show(True)
           self.SetTopWindow(frame)
           return True

   if __name__ == '__main__':
       app = MyApp(0)
       app.MainLoop()

the system default font (which is in the case of WinXP Tahoma) is used?

Kind regards,
Markus