/* Show the "about" right-click menu item, and
connect its event handler. */
xfce_panel_plugin_menu_show_about(plugin);
g_signal_connect(G_OBJECT(plugin), "about",
/* Show the "about" right-click menu item, and
connect its event handler. */
xfce_panel_plugin_menu_show_about(plugin);
g_signal_connect(G_OBJECT(plugin), "about",