title: Wxpython show dialog on main frame startup
body: <p>I am a new using python and wxpython. I have a problem to show login form dialog after main frame startup like <a href="https://lh4.googleusercontent.com/-ipyi_RDKs7I/VE8y7NhgHKI/AAAAAAAACS8/5F0JH91bRws/s800/a.jpg" rel="nofollow">this picture</a></p>
  
  <p>So if the user is not logged, the main frame cannot access. And if user click close/tutup button, it will close the main frame also. Please give me a sample code :)</p>