Accelerator to close window

Hello, Is it possible to have a single GtkWindow and bind a key to close it. I mean without having any button nor menuitem, is it possible to bind Ctr-X to close a window ? I tried : $this->_accel_group = &new GtkAccelGroup(); $this->dialog->add_accel_group ($this->_accel_group); $this->dialog->add_accelerator ("destroy", $this->_accel_group, GDK_KEY__x, GDK_CONTROL_MASK, GTK_ACCEL_VISIBLE); ... But doesn't work $btnExit = new GtkButton(); // Button not visible $this->_accel_group = &new GtkAccelGroup(); $this->dialog->add_accel_group ($this->_accel_group); $btnExit->add_accelerator ("clicked", $this->_accel_group, GDK_KEY__x, GDK_CONTROL_MASK, GTK_ACCEL_VISIBLE); ... But doesn't work Any idea ? Thanks in advance, Benjamin FOURTICQ.