diff --git a/examples/gui/demo_view_dc.c b/examples/gui/demo_view_dc.c
index 775038fdf6..b6c31d54ea 100644
--- a/examples/gui/demo_view_dc.c
+++ b/examples/gui/demo_view_dc.c
@@ -3,28 +3,6 @@
 #include <rtgui/widgets/label.h>
 #include <rtgui/widgets/slider.h>
 
-static const rt_uint8_t boxChecked[7] = {0x02, 0x06, 0x8E, 0xDC, 0xF8, 0x70, 0x20};
-
-static const rt_uint8_t  sysMin[2] = {0x7E, 0x7E};
-static const rt_uint8_t  sysMax[18] = {0x0F, 0xF8, 0x0F, 0xF8, 0x08, 0x08,
-	0x08, 0x08, 0x08, 0x08, 0x08, 0x08,
-	0x08, 0x08, 0x08, 0x08, 0x0F, 0xF8
-};
-static const rt_uint8_t  sysNormal[18] = {0x03, 0xF0, 0x03, 0xF0, 0x02, 0x10,
-	0x0F, 0xD0, 0x0F, 0xD0, 0x08, 0x70,
-	0x08, 0x40, 0x08, 0x40, 0x0F, 0xC0
-};
-
-static const rt_uint8_t  sysClose[14] = {0x06, 0x18, 0x03, 0x30, 0x01, 0xE0, 0x00,
-	0xC0, 0x01, 0xE0, 0x03, 0x30, 0x06, 0x18
-};
-
-static const rt_uint8_t  viewSYS[28] = {0xFF, 0x1F, 0x3C, 0x06, 0x1C, 0x04, 0x1C,
-	0x0C, 0x0E, 0x08, 0x0E, 0x18, 0x07, 0x10,
-	0x07, 0x30, 0x03, 0xA0, 0x03, 0xE0, 0x01,
-	0xC0, 0x01, 0xC0, 0x00, 0x80, 0x00, 0x80
-};
-
 rt_bool_t dc_event_handler(rtgui_widget_t* widget, rtgui_event_t *event)
 {
 	if (event->type == RTGUI_EVENT_PAINT)
@@ -72,57 +50,7 @@ rt_bool_t dc_event_handler(rtgui_widget_t* widget, rtgui_event_t *event)
 		rtgui_dc_set_color(dc, blue);
 		rtgui_dc_draw_polygon(dc, vx, vy, 6);
 
-		{
-			rtgui_rect_t item_rect = {0, 0, 14, 14};
-			rt_uint16_t item_size = 14;
-
-			rtgui_rect_moveto(&item_rect, 100, 100);
-
-			rtgui_dc_set_color(dc, RTGUI_RGB(0x66, 0x66, 0x66));
-			rtgui_dc_draw_circle(dc, item_rect.x1 + item_size/2, item_rect.y1 + item_size/2, item_size/2);
-			rtgui_dc_set_color(dc, RTGUI_RGB(0xff, 0xFF, 0xFF));
-			rtgui_dc_draw_circle(dc, item_rect.x1 + item_size/2, item_rect.y1 + item_size/2, item_size/2 - 1);
-
-			rtgui_dc_set_color(dc, RTGUI_RGB(0x00, 0x00, 0x00));
-			rtgui_dc_fill_circle(dc, item_rect.x1 + item_size/2, item_rect.y1 + item_size/2, item_size/2 - 3);
-		}
-
-		{
-			rtgui_rect_t item_rect = {0, 0, 14, 14};
-			rt_uint16_t item_size = 14;
-			rtgui_rect_moveto(&item_rect, 120, 120);
-
-			rtgui_dc_set_color(dc, RTGUI_RGB(0x66, 0x66, 0x66));
-			rtgui_dc_draw_circle(dc, item_rect.x1 + item_size/2, item_rect.y1 + item_size/2, item_size/2);
-			rtgui_dc_set_color(dc, RTGUI_RGB(0xff, 0xFF, 0xFF));
-			rtgui_dc_draw_circle(dc, item_rect.x1 + item_size/2, item_rect.y1 + item_size/2, item_size/2 - 1);
-			rtgui_dc_set_color(dc, RTGUI_RGB(0x00, 0x00, 0x00));
-		}
-		{
-			int x, y;
-
-			x = 150; y = 150;
-			rtgui_dc_set_color(dc, black);
-
-			rtgui_dc_draw_byte(dc, x, y, 7, boxChecked);
-			y += 7 + 2;
-
-			rtgui_dc_draw_byte(dc, x, y, 2, sysMin);
-			y += 2 + 2;
-
-			rtgui_dc_draw_word(dc, x, y, 9, sysMax);
-			y += 9 + 2;
-
-			rtgui_dc_draw_word(dc, x, y, 9, sysNormal);
-			y += 9 + 2;
-
-			rtgui_dc_draw_word(dc, x, y, 7, sysClose);
-			y += 7 + 2;
-
-			rtgui_dc_draw_word(dc, x, y, 14, viewSYS);
-			y += 14 + 2;
-		}
-
+		/* 绘制不同的边框 */
 		{
 			rtgui_rect_t rect = {0, 0, 16, 16};
 			rtgui_rect_moveto(&rect, 30, 120);
diff --git a/examples/gui/demo_view_image.c b/examples/gui/demo_view_image.c
index 925e6b93a6..5053b8cd41 100644
--- a/examples/gui/demo_view_image.c
+++ b/examples/gui/demo_view_image.c
@@ -31,9 +31,16 @@ static void open_btn_onbutton(rtgui_widget_t* widget, struct rtgui_event* event)
 		rt_memset(image_type, 0, sizeof(image_type));
 
 		/* 获得图像的类型 */
-		if (rt_strstr(path, ".png") != RT_NULL) strcat(image_type, "png");
-		if (rt_strstr(path, ".jpg") != RT_NULL) strcat(image_type, "jpeg");
-		if (rt_strstr(path, ".hdc") != RT_NULL) strcat(image_type, "hdc");
+		if (rt_strstr(path, ".png") != RT_NULL ||
+			rt_strstr(path, ".PNG") != RT_NULL) 
+			strcat(image_type, "png");
+		if (rt_strstr(path, ".jpg") != RT_NULL ||
+			rt_strstr(path, ".JPG") != RT_NULL) 
+			strcat(image_type, "jpeg");
+		if (rt_strstr(path, ".hdc") != RT_NULL ||
+			rt_strstr(path, ".HDC") != RT_NULL) 
+			strcat(image_type, "hdc");
+
 		if (image_type[0] != '\0')
 			image = rtgui_image_create_from_file(image_type, path, RT_TRUE);
 	}
diff --git a/examples/gui/demo_view_window.c b/examples/gui/demo_view_window.c
index b04a37db08..5d336b552e 100644
--- a/examples/gui/demo_view_window.c
+++ b/examples/gui/demo_view_window.c
@@ -120,6 +120,8 @@ void window_demo_modal(rtgui_toplevel_t* parent)
 
 	/* 模态显示窗口 */
 	rtgui_win_show(win, RT_TRUE);
+	/* 采用模态显示窗口，关闭时不会自行删除窗口，需要主动删除窗口 */
+	rtgui_win_destroy(win);
 }
 
 void window_demo_notitle(rtgui_toplevel_t* parent)
diff --git a/examples/gui/demo_workbench.c b/examples/gui/demo_workbench.c
index 2dc43176b7..5b5d01dab0 100644
--- a/examples/gui/demo_workbench.c
+++ b/examples/gui/demo_workbench.c
@@ -6,8 +6,8 @@
 
 static rt_bool_t demo_workbench_event_handler(struct rtgui_widget* widget, struct rtgui_event* event)
 {
-	/* 鎴戜滑鐩墠鍙鎸夐敭浜嬩欢鎰熷叴瓒� */
-	if (event->type == RTGUI_EVENT_KBD)
+	/* 鎴戜滑鐩墠鍙鎸夐敭浜嬩欢鎰熷叴瓒ｃ�傚鏋滃綋鍓峸orkbench澶勪簬妯″紡鏄剧ず鐘舵�侊紝蹇界暐瀹�  */
+	if ((event->type == RTGUI_EVENT_KBD) && !RTGUI_WORKBENCH_IS_MODAL_MODE(RTGUI_WORKBENCH(widget)))
 	{
 		struct rtgui_event_kbd* ekbd = (struct rtgui_event_kbd*)event;