代码：

#include <gtk-2.0/gtk/gtk.h>
#include <glib-2.0/glib.h>
#include <gtk-2.0/gdk/gdkkeysyms.h>
#include <stdio.h>static void label_const(GtkWidget *eventbox) {static int i = 0;static char citem[100];sprintf(citem, "标签单击的次数：%d", ++i);GtkWidget *dialog;dialog = gtk_message_dialog_new(NULL, GTK_DIALOG_MODAL, GTK_MESSAGE_INFO,GTK_BUTTONS_OK, citem);gtk_window_set_title(GTK_WINDOW(dialog), "单击次数");gtk_dialog_run(GTK_DIALOG(dialog));gtk_widget_destroy(dialog);}int main(int argc, char *argv[]) {gtk_init(&argc, &argv);GtkWidget *window;window = gtk_window_new(GTK_WINDOW_TOPLEVEL);gtk_window_set_title(GTK_WINDOW(window), "事件盒演示");gtk_widget_show(window);GtkWidget *eventbox;eventbox = gtk_event_box_new();gtk_widget_show(eventbox);gtk_container_add(GTK_CONTAINER(window), eventbox);GtkWidget *label;label = gtk_label_new("请用鼠标单击标签");gtk_widget_show(label);gtk_container_add(GTK_CONTAINER(eventbox), label);g_signal_connect(G_OBJECT(window), "delete_event",G_CALLBACK(gtk_main_quit), NULL);g_signal_connect((gpointer) eventbox, "button_press_event", G_CALLBACK(label_const), NULL);gtk_main();return 0;
}

编译运行