[pygtk] How to get hwnd of StatusIcon

[Todong Ma]

Hi everyone,
I want to display a balloon notification near system tray icon, I found 
calling Shell_NotifyIcon with .szInfo and .szInfoTitle will show a 
balloon message.

Widget.get_window() can be used to get a Widget's hwnd, but how could I 
get hwnd of StatusIcon since it's direct child class of GObject?

Thanks,