Changing of icon of toolbar button

[Michal ROMAN <michal roman nov sk>]

Hi,

I have created toolbar :

toolbar1 = gtk_toolbar_new (GTK_ORIENTATION_HORIZONTAL,
GTK_TOOLBAR_BOTH);
gtk_widget_ref (toolbar1);
gtk_object_set_data_full (GTK_OBJECT (window1), "toolbar1", toolbar1,
                            (GtkDestroyNotify) gtk_widget_unref);
gtk_widget_show (toolbar1);
gtk_container_add (GTK_CONTAINER (handlebox1), toolbar1);

tmp_toolbar_icon = create_pixmap (window1, "icon.xpm");
button1 = gtk_toolbar_append_element (GTK_TOOLBAR (toolbar1),
GTK_TOOLBAR_CHILD_BUTTON, NULL, _("button1"), NULL,
NULL,tmp_toolbar_icon, NULL, NULL);
gtk_widget_ref (button1);
gtk_object_set_data_full (GTK_OBJECT (window1), "button1", button1,
(GtkDestroyNotify) gtk_widget_unref);
gtk_widget_show (button1);


How can I change icon for button1 in my program?

Thank's
Michal