diff --git a/24_day/bootpack.c b/24_day/bootpack.c
index 541aa30..668bae3 100644
--- a/24_day/bootpack.c
+++ b/24_day/bootpack.c
@@ -285,6 +285,18 @@ void HariMain(void)
 											mmx = mx; /*进入窗口移动模式*/
 											mmy = my;
 										}
+										if (sht->bxsize - 21 <= x && x < sht->bxsize - 5 && 5 <=y && y < 19) {
+											/*点击“×”按钮*/
+											if (sht->task != 0) { /*该窗口是否为应用程序窗口？*/
+												cons = (struct CONSOLE *) *((int *) 0x0fec);
+												cons_putstr0(cons, "\nBreak(mouse) :\n");
+												io_cli(); /*强制结束处理中禁止切换任务*/
+												task_cons->tss.eax = (int)
+												&(task_cons->tss.esp0);
+												task_cons->tss.eip = (int) asm_end_app;
+												io_sti();
+											}
+										}
 										break;
 									}
 								}