A general "About" dialog src code paragraph in Gtk+ programming

GTK_CALLBACK void on_toolbutton_about_clicked(GtkWidget *btn, gpointer user_data)
{

GtkWidget *about_dialog;
GdkPixbuf *logo;
GError *error=NULL;
const gchar *author[]={"Guan Jiaying"};

about_dialog=gtk_about_dialog_new();

logo=gdk_pixbuf_new_from_file("k.ico",&error);
if(!error)
gtk_about_dialog_set_logo(GTK_ABOUT_DIALOG(about_dialog),logo);
else
{
g_print("Error:%s\n",error->message);
g_error_free(error);
}

gtk_about_dialog_set_program_name(GTK_ABOUT_DIALOG(about_dialog),"Chinese Certification Document Editor");
gtk_about_dialog_set_version(GTK_ABOUT_DIALOG(about_dialog),"v1.0");
gtk_about_dialog_set_authors(GTK_ABOUT_DIALOG(about_dialog),author);

gtk_about_dialog_set_license(GTK_ABOUT_DIALOG(about_dialog),"Free license under Guan's approval");
gtk_about_dialog_set_copyright(GTK_ABOUT_DIALOG(about_dialog),"(C) 2014 Guan");

gtk_dialog_run(GTK_DIALOG(about_dialog));
gtk_widget_destroy(about_dialog);

}