How to handle events on arrow widget

[xsj cmbchina com (Xiong Shao Jun)]

Hi, gtk fans, I ran into a problem a few days ago. I'd like to handle
events on an arrow
widget. I used the following program segment:
butbox = gtk_vbox_new(FALSE, 0);
......
arrow = gtk_arrow_new(GTK_ARROW_LEFT, GTK_SHADOW_OUT);
gtk_box_pack_start(GTK_BOX(butbox), arrow, TRUE, TRUE, 0);
gtk_widget_show(arrow);

gtk_signal_connect(GTK_OBJECT(arrow),  "button_press_event",
        (GtkSignalFunc)arrow_button,
        NULL);
gtk_signal_connect(GTK_OBJECT(arrow),  "enter_notify_event",
        (GtkSignalFunc)arrow_enter,
        NULL);
gtk_signal_connect(GTK_OBJECT(arrow),  "key_press_event",
        (GtkSignalFunc)arrow_key,
        NULL);
gtk_widget_set_events(arrow,   GDK_BUTTON_PRESS_MASK |
                                                GDK_KEY_PRESS_MASK |
                                                GDK_ENTER_NOTIFY_MASK);

But the event handlers are not called. So how to handle events on
arrows? Should I have
to use event box, and pack the arrow into the event box, then handle
events on event box?

Much thanks,
Xiong Shaojun