gtkmm and save/restore window positions

[Johann Horvat <horvat johann gmx net>]

Hello!

I don't know if this is the right mailing list to ask my question...

Does anyone can tell me how to save and restore window positions with
gtkmm 2.4.

I found get_geometry:
http://www.gtkmm.org/docs/gtkmm-2.4/docs/reference/html/classGdk_1_1Window.html#6833d29726c3d995c39b74310d21326e

Here's a code fragment

WindowMain::~WindowMain(){
  int x, y, w, h, d;
		
  Glib::RefPtr<Gdk::Window> window=get_window();
  window->get_geometry(x, y, w, h, d);
	
  std::cout<<"x="<<(guint)x<<" y="<<(guint)y<<std::endl;
}

Sometimes (nearly every third time) I execute this code, it works
(gives the coordinates), most of the time I get a
x=4 y=23

The linik above says something about gdk_window_get_position, but I
don't know how to use it...

Thanks
Johann