I am assisting with Windows support for a PyGTK app that appears as a system tray applet, but am not so strong on the GTK+ gooey stuff...
We have it so when you left-click the systray icon, the window appears right by your tray icon no matter where your system tray is--and on Linux this works great, using the results of gtk.StatusIcon.get_geometry() to calculate the size and position. 
Of course, the docs for gtk.StatusIcon.get_geometry() point out that "some platforms do not provide this information"--and this includes MS Windows, as I get NoneType as the result.
I can make a guess and position the window in the bottom-right corner of the screen, 30 pixels up from the bottom--as this will catch the majority of Windows users who haven't moved the taskbar. But for those that have, it looks all wrong.
So is there a Windows-friendly way to get the position of the systray icon so I can place my window there?

Please note: I am already using gtk_menu_popup() with gtk_status_icon_position_menu for a pop-up menu which works correctly.
But what I am trying to position is a separate gtk.Window, which will not accept gtk_status_icon_position_menu (because it's not a menu).
Any other ideas would be appreciated...
Gtk provides function gtk_status_icon_position_menu that can be passed into gtk_menu_popup as a GtkPositionFunc.
This seems to provide the requested functionality.
Getting the position of the gtk.StatusIcon on Windows