diff --git a/25_day/bootpack.c b/25_day/bootpack.c
index 9d5c075..0b011af 100644
--- a/25_day/bootpack.c
+++ b/25_day/bootpack.c
@@ -21,7 +21,7 @@ void HariMain(void)
 	struct MEMMAN *memman = (struct MEMMAN *) MEMMAN_ADDR;
 	unsigned char *buf_back, buf_mouse[256], *buf_win, *buf_cons[2];
 	struct SHEET *sht_back, *sht_mouse, *sht_win, *sht_cons[2];
-	struct TASK *task_a, *task_cons[2];
+	struct TASK *task_a, *task_cons[2], *task;
 	struct TIMER *timer;
 	static char keytable0[0x80] = {
 		0,   0,   '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '-', '^', 0,   0,
@@ -232,13 +232,15 @@ void HariMain(void)
 					fifo32_put(&keycmd, KEYCMD_LED);
 					fifo32_put(&keycmd, key_leds);
 				}
-				if (i == 256 + 0x3b && key_shift != 0 && task_cons[0]->tss.ss0 != 0) { /* Shift+F1 */
-					cons = (struct CONSOLE *) *((int *) 0x0fec);
-					cons_putstr0(cons, "\nBreak(key) :\n");
-					io_cli(); /*强制结束处理时禁止任务切换*/
-					task_cons[0]->tss.eax = (int) &(task_cons[0]->tss.esp0);
-					task_cons[0]->tss.eip = (int) asm_end_app;
-					io_sti();
+				if (i == 256 + 0x3b && key_shift != 0) {
+					task = key_win->task;
+					if (task != 0 && task->tss.ss0 != 0) { /* Shift+F1 */
+						cons_putstr0(cons, "\nBreak(key) :\n");
+						io_cli(); /*强制结束处理时禁止任务切换*/
+						task->tss.eax = (int) &(task->tss.esp0);
+						task->tss.eip = (int) asm_end_app;
+						io_sti();
+					}
 				}
 				if (i == 256 + 0x57 && shtctl->top > 2) { /* F11 */
 					sheet_updown(shtctl->sheets[1], shtctl->top - 1);
@@ -298,11 +300,11 @@ void HariMain(void)
 										if (sht->bxsize - 21 <= x && x < sht->bxsize - 5 && 5 <=y && y < 19) {
 											/*点击“×”按钮*/
 											if ((sht->flags & 0x10) != 0) { /*该窗口是否为应用程序窗口？*/
-												cons = (struct CONSOLE *) *((int *) 0x0fec);
+												task = sht->task;
 												cons_putstr0(cons, "\nBreak(mouse) :\n");
-												io_cli(); /*强制结束处理中禁止切换任务*/
-												task_cons[0]->tss.eax = (int) &(task_cons[0]->tss.esp0);
-												task_cons[0]->tss.eip = (int) asm_end_app;
+												io_cli(); /*强制结束处理时禁止任务切换*/
+												task->tss.eax = (int) &(task->tss.esp0);/*到此结束*/
+												task->tss.eip = (int) asm_end_app;
 												io_sti();
 											}
 										}