Transparent image

[Rok Jaklič <rokj rasca net>]

Hi.

I have a simple program which loads image from file and display it into 
the window. Image has also some transparent sections. Is it possible to 
show image without window background (soo I can see desktop background).

Code:

#include <gtkmm.h>

int main(int argc, char *argv[]) {
       Gtk::Main kit(argc, argv);
       Gtk::Window window;
       // window.fullscreen();
       Glib::RefPtr<Gdk::Pixbuf> pixbuf = 
Gdk::Pixbuf::create_from_file("images/logo.png");
       Gtk::Widget *image = new Gtk::Image(pixbuf);
       window.add(*image);
       window.set_decorated(false);
       window.show_all();
       Gtk::Main::run(window);
       Gtk::Main::quit();
       return 0;
}

Kind regards,

Rok