A simple HTML help dialog box using the distribution data files.

def help_box():
    """A simple HTML help dialog box using the distribution data files."""
    style = wx.DEFAULT_DIALOG_STYLE | wx.RESIZE_BORDER
    dialog_box = wx.Dialog(None, wx.ID_ANY, HELP_TITLE,
                           style=style, size=(620, 450))
    html_widget = HtmlHelp(dialog_box, wx.ID_ANY)
    html_widget.page = build_help_html()
    dialog_box.ShowModal()
    dialog_box.Destroy()