+ Constructor. Use the `ShowModal` method to show the dialog.
+
+ :param parent: The parent window.
+ :param message: Text to display above the list of selections.
+ :param caption: Text to use in the title bar of the dialog.
+ :param choices: A list of strings or unicode objects that the
+ user is allowed to choose from.
+ :param style: Styles to apply to the dialog. The default value is
+ equivallent to wx.DEFAULT_DIALOG_STYLE|wx.RESIZE_BORDER|wx.OK|wx.CANCEL|wx.CENTER.
+ :param pos: Where to position the dialog (not used on Windows)
+
+