Another snippet, all in the name of GUI comparisons:

import wx.wx;

public class HelloWorldApp : App
{
  public override bool OnInit()
  {
    Frame frame = new Frame(null, wxID_ANY, "Hello wxWidgets World");
    frame.CreateStatusBar();
    frame.SetStatusText("Hello World");
    frame.Show(true);
    return true;
  }
}

int main()
{
  HelloWorldApp app = new HelloWorldApp();
  app.Run();
  return 0;
}

Screenshots at http://wxd.sourceforge.net/Hello.html

--anders