diff --git a/README.md b/README.md
index 23de31d..cf221fb 100644
--- a/README.md
+++ b/README.md
@@ -1,16 +1,28 @@
 # GuiLite - 简洁出奇迹
+- [功能介绍](#功能介绍)
+- [实例程序](#实例程序)
+- [开发文档](#开发文档)
+- [致谢](#致谢)
+***
+## GuiLite是什么鬼？
 - GuiLite（超轻量UI框架）是5千行代码的**全平台UI框架**，可以完美运行在iOS，Android，Windows（包含VR），Mac，单片机和**市面所有的 ARM Linux物联网终端设备**上。
 - GuiLite可以嵌入在iOS、Android、MFC、QT等其他UI系统中，让你的界面集百家之长，又不失个性。
-- GuiLite鼓励混合编程，开发者可以用GuiLite接管UI部分，用Swift，Java，Go，C#，Python发开业务部分。
+- GuiLite鼓励混合编程，开发者可以用GuiLite接管UI部分，用Swift，Java，Go，C#，Python开发业务部分。
 
 相比QT、MFC，GuiLite不预设开发者的使用场景，不在具体功能上，大包大揽；用框架的简洁，换取开发的自由；GuiLite在图形绘制上面，力图一步到位，运行效率感人。
 
-## 新功能：多语言demo -- HelloFont
-![HelloFont](doc/HelloFont.gif)
+## 为什么开发GuiLite？如何使用？
+- 任何UI框架都不是为你我而生的，只有掌握核心原理，对其深度定制，才能真正掌握自己的命运！因此，我们开发了GuiLite，希望用这5千行代码揭示UI的核心原理和定制方法。
+- 我们不推荐开发者全盘使用GuiLite；鼓励开发者在吃透代码后，根据自身业务特点，修改出更加丰富、个性的界面；或者发展出适合自己的UI框架。
+- 为了聚焦UI核心原理，GuiLite会一直保持单片机的代码体量。
 
-**信不信由你，代码只有100+行！**[查阅代码](https://gitee.com/idea4good/GuiLiteSamples/blob/master/HelloFont/UIcode/UIcode.cpp)
+## 新功能：滑屏demo -- HelloSlide
+![HelloSlide](doc/HelloSlide.gif)
 
-## 卓越的跨平台能力
+**信不信由你，代码只有100+行！**[查阅代码](https://gitee.com/idea4good/GuiLiteSamples/blob/master/HelloSlide/UIcode/UIcode.cpp)
+
+## 功能介绍
+### 卓越的跨平台能力
 在Mac, iOS下的运行效果:
 
 ![Mac](doc/Mac.gif) ![iOS](doc/Ios.landscape.gif)
@@ -23,7 +35,7 @@
 
 ![Win MR](doc/WinMR.gif)
 
-## 万国语和墙纸
+### 万国语和墙纸
 墙纸：
 ![unicode](doc/wallpaper.jpg)
 
@@ -32,12 +44,12 @@
 
 [如何制作多种文字/位图资源?](https://github.com/idea4good/GuiLiteToolkit)
 
-## “换肤”功能
+### “换肤”功能
 ![multi-theme](doc/multi-theme.png)
 
-[如何“换肤”？](https://github.com/idea4good/GuiLiteSamples/blob/master/HostMonitor/SampleCode/source/resource/resource.cpp)
+[如何“换肤”？](https://gitee.com/idea4good/GuiLiteSamples/blob/master/HostMonitor/SampleCode/source/resource/resource.cpp)
 
-## 自我监控
+### 自我监控
 **上报“编译/运行”情况至“云端”：**
 
 ![BuildInfo](doc/BuildInfo.png)
@@ -46,34 +58,27 @@
 
 ![DataOnCloud](doc/data_on_cloud.png)
 
-## 为什么开发GuiLite？如何使用？
-任何UI框架都不是为你我而生的，只有掌握核心原理，对其深度定制，才能真正掌握自己的命运！因此，我们开发了GuiLite，希望用这5千行代码揭示UI的核心原理和定制方法。
-
-我们不推荐开发者全盘使用GuiLite；鼓励开发者在吃透代码后，根据自身业务特点，修改出更加丰富、个性的界面；或者发展出适合自己的UI框架。
-
-为了聚焦UI核心原理，GuiLite会一直保持单片机的代码体量。
-
-## 快速上手
-- 下载实例代码: `git clone https://gitee.com/idea4good/GuiLiteSamples`
-- `cd GuiLiteSamples\HostMonitor`
-- [编译/运行在任意平台上](https://gitee.com/idea4good/GuiLiteSamples/tree/master/HostMonitor/README.md)
+## 实例程序
+GuiLite只是一个框架，本身并不能生成UI。为了能够展示如何用GuiLite开发App，我们提供了一些实例程序给大家参考。
+- 点击[这里](https://gitee.com/idea4good/GuiLiteSamples)预览UI效果。
+- 实例程序的功能说明：
 
+| 实例名称 | 支持的平台 | 功能简介 | 编译方法 | 难度 |
+| --- | --- | --- | --- | --- |
+| HelloGuiLite | Windows, Linux | 初始化GuiLite，加载资源，布局界面元素，按钮响应 | [编译/运行](https://gitee.com/idea4good/GuiLiteSamples/blob/master/HelloGuiLite/README.md) | 初级 |
+| HelloFont | Windows, Linux | 显示多种语言（不限：中、英文） | [编译/运行](https://gitee.com/idea4good/GuiLiteSamples/blob/master/HelloFont/README.md) | 初级 |
+| HelloSlide | Windows, Linux | 滑屏界面的应用 | [编译/运行](https://gitee.com/idea4good/GuiLiteSamples/blob/master/HelloSlide/README.md) | 中级 |
+| HostMonitor | iOS, Mac, Android, Windows, Linux | 创建复杂界面，扩展自定义控件，适配全平台 | [编译/运行](https://gitee.com/idea4good/GuiLiteSamples/blob/master/HostMonitor/README.md) | 高级 |
 ## 开发文档
-[代码结构及注释](doc/CodeWalkthrough-cn.md)
-
-[如何编译?](doc/HowToBuild.md)
-
-[如何布局UI?](doc/HowLayoutWork.md)
-
-[如何传递消息?](doc/HowMessageWork.md)
+- [如何编译?](doc/HowToBuild.md)
+- [设计原理](doc/CodeWalkthrough-cn.md)
+- [UML示意图](doc/UML.md)
+- [如何布局UI?](doc/HowLayoutWork.md)
+- [如何传递消息?](doc/HowMessageWork.md)
 
 ## 视频链接:
-[GuiLite简介](https://v.youku.com/v_show/id_XMzA5NTMzMTYyOA)
-
-[3D GuiLite](https://v.youku.com/v_show/id_XMzYxNTE3MTI0MA)
-
-## 实例代码链接
-[GuiLiteSamples](https://gitee.com/idea4good/GuiLiteSamples)
+- [GuiLite简介](https://v.youku.com/v_show/id_XMzA5NTMzMTYyOA)
+- [3D GuiLite](https://v.youku.com/v_show/id_XMzYxNTE3MTI0MA)
 
 ## GitHub链接
 [GitHub链接](https://github.com/idea4good/GuiLite)
diff --git a/core/core_include/display.h b/core/core_include/display.h
index b5dedb7..2f8e108 100644
--- a/core/core_include/display.h
+++ b/core/core_include/display.h
@@ -7,6 +7,7 @@ class c_hid_pipe;
 class c_surface;
 
 class c_display {
+	friend class c_surface;
 public:
 	c_display(void* phy_fb, unsigned int display_width, unsigned int display_height,
 					unsigned int surface_width, unsigned int surface_height,
@@ -16,13 +17,15 @@ public:
 	unsigned int get_width() { return m_width; }
 	unsigned int get_height() { return m_height; }
 
-	void* get_frame_buffer(int* width, int* height);
+	void* get_updated_fb(int* width, int* height, bool force_update = false);
 	int snap_shot(const char* file_name);
 private:
 	unsigned int	m_width;		//in pixels
 	unsigned int	m_height;		//in pixels
 	unsigned int	m_color_bytes;	//16 bits, 32 bits only
 	void*			m_phy_fb;
+	int				m_phy_read_index;
+	int				m_phy_write_index;
 	c_surface* 		m_surface_group[SURFACE_CNT_MAX];
 	unsigned int	m_surface_cnt;
 };
diff --git a/core/core_include/surface.h b/core/core_include/surface.h
index fb59975..2453554 100644
--- a/core/core_include/surface.h
+++ b/core/core_include/surface.h
@@ -46,7 +46,7 @@ protected:
 
 	void set_surface(void* wnd_root, Z_ORDER_LEVEL max_z_order);
 	int copy_layer_pixel_2_fb(int x, int y, unsigned int z_order);
-	c_surface(c_display* display, void* phy_fb, unsigned int width, unsigned int height, unsigned int color_bytes);
+	c_surface(c_display* display, unsigned int width, unsigned int height, unsigned int color_bytes);
 	int						m_width;		//in pixels
 	int						m_height;		//in pixels
 	int						m_color_bytes;	//16 bits, 32 bits only
@@ -57,13 +57,14 @@ protected:
 	Z_ORDER_LEVEL			m_max_zorder;
 	Z_ORDER_LEVEL			m_top_zorder;
 	void*					m_phy_fb;
+	int*					m_phy_write_index;
 	c_display*				m_display;
 };
 
 class c_surface_16bits : public c_surface {
 	friend class c_display;
-	c_surface_16bits(c_display* display, void* phy_fb, unsigned int width, unsigned int height, unsigned int color_bytes) :
-					c_surface(display, phy_fb, width, height, color_bytes) {};
+	c_surface_16bits(c_display* display, unsigned int width, unsigned int height, unsigned int color_bytes) :
+					c_surface(display, width, height, color_bytes) {};
 	virtual void draw_pixel(int x, int y, unsigned int rgb, unsigned int z_order);
 	virtual void fill_rect(int x0, int y0, int x1, int y1, unsigned int rgb, unsigned int z_order);
 	virtual void fill_rect_on_fb(int x0, int y0, int x1, int y1, unsigned int rgb);
diff --git a/core/src/display.cpp b/core/src/display.cpp
index cc9f0e3..311cab0 100644
--- a/core/src/display.cpp
+++ b/core/src/display.cpp
@@ -22,6 +22,7 @@ c_display::c_display(void* phy_fb, unsigned int display_width, unsigned int disp
 	m_height = display_height;
 	m_color_bytes = color_bytes;
 	m_phy_fb = phy_fb;
+	m_phy_read_index = m_phy_write_index = 0;
 
 	m_surface_cnt = surface_cnt;
 	if (m_surface_cnt > SURFACE_CNT_MAX)
@@ -31,8 +32,8 @@ c_display::c_display(void* phy_fb, unsigned int display_width, unsigned int disp
 	memset(m_surface_group, 0, sizeof(m_surface_group));
 	for (int i = 0; i < m_surface_cnt; i++)
 	{
-		m_surface_group[i] = (color_bytes == 4) ? new c_surface(this, m_phy_fb, surface_width, surface_height, color_bytes) :
-												  new c_surface_16bits(this, m_phy_fb, surface_width, surface_height, color_bytes);
+		m_surface_group[i] = (color_bytes == 4) ? new c_surface(this, surface_width, surface_height, color_bytes) :
+												  new c_surface_16bits(this, surface_width, surface_height, color_bytes);
 	}
 }
 
@@ -75,7 +76,7 @@ int c_display::merge_surface(c_surface* s0, c_surface* s1, int x0, int x1, int y
 	int surface_width = s0->get_width();
 	int surface_height = s0->get_height();
 
-	if (offset < 0 || offset >= surface_width || y0 < 0 || y0 >= surface_height ||
+	if (offset < 0 || offset > surface_width || y0 < 0 || y0 >= surface_height ||
 		y1 < 0 || y1 >= surface_height || x0 < 0 || x0 >= surface_width || x1 < 0 || x1 >= surface_width)
 	{
 		ASSERT(FALSE);
@@ -83,7 +84,7 @@ int c_display::merge_surface(c_surface* s0, c_surface* s1, int x0, int x1, int y
 	}
 
 	int width = (x1 - x0 + 1);
-	if (width < 0 || width >= surface_width || width < offset)
+	if (width < 0 || width > surface_width || width < offset)
 	{
 		ASSERT(FALSE);
 		return -1;
@@ -104,16 +105,26 @@ int c_display::merge_surface(c_surface* s0, c_surface* s1, int x0, int x1, int y
 		addr_d = ((char*)(m_phy_fb) + (y * m_width + x0 + (width - offset)) * m_color_bytes);
 		memcpy(addr_d, addr_s, offset * m_color_bytes);
 	}
+	m_phy_write_index++;
 	return 0;
 }
 
-void* c_display::get_frame_buffer(int* width, int* height)
+void* c_display::get_updated_fb(int* width, int* height, bool force_update)
 {
 	if (width && height) 
 	{
 		*width = get_width();
 		*height = get_height();
 	}
+	if (force_update)
+	{
+		return m_phy_fb;
+	}
+	if (m_phy_read_index == m_phy_write_index)
+	{//No update
+		return NULL;
+	}
+	m_phy_read_index = m_phy_write_index;
 	return m_phy_fb;
 }
 
diff --git a/core/src/surface.cpp b/core/src/surface.cpp
index ff4d21b..aea40e1 100644
--- a/core/src/surface.cpp
+++ b/core/src/surface.cpp
@@ -8,13 +8,14 @@
 #include <string.h>
 #include <stdlib.h>
 
-c_surface::c_surface(c_display* display, void* phy_fb, unsigned int width, unsigned int height, unsigned int color_bytes)
+c_surface::c_surface(c_display* display,  unsigned int width, unsigned int height, unsigned int color_bytes)
 {
 	m_width = width;
 	m_height = height;
 	m_color_bytes = color_bytes;
 	m_display = display;
-	m_phy_fb = phy_fb;
+	m_phy_fb = display->m_phy_fb;
+	m_phy_write_index = &display->m_phy_write_index;
 	m_fb = m_usr = NULL;
 	m_top_zorder = m_max_zorder = Z_ORDER_LEVEL_0;
 	m_is_active = false;
@@ -94,6 +95,7 @@ void c_surface::set_pixel(int x, int y, unsigned int rgb)
 	if (m_is_active && (x < display_width) && (y < display_height))
 	{
 		((unsigned int*)m_phy_fb)[y * (m_display->get_width()) + x] = rgb;
+		*m_phy_write_index = *m_phy_write_index + 1;
 	}
 }
 
@@ -143,6 +145,7 @@ void c_surface::fill_rect_on_fb(int x0, int y0, int x1, int y1, unsigned int rgb
 		x = x0;
 		fb = &((unsigned int*)m_fb)[y0 * m_width + x];
 		phy_fb = &((unsigned int*)m_phy_fb)[y0 * display_width + x];
+		*m_phy_write_index = *m_phy_write_index + 1;
 		for (; x <= x1; x++)
 		{
 			*fb++ = rgb;
@@ -361,6 +364,7 @@ int c_surface::copy_layer_pixel_2_fb(int x, int y, unsigned int z_order)
 		if (m_is_active && (x < display_width) && (y < display_height))
 		{
 			((unsigned int*)m_phy_fb)[y * display_width + x] = rgb;
+			*m_phy_write_index = *m_phy_write_index + 1;
 		}
 	}
 	else//16 bits
@@ -370,6 +374,7 @@ int c_surface::copy_layer_pixel_2_fb(int x, int y, unsigned int z_order)
 		if (m_is_active && (x < display_width) && (y < display_height))
 		{
 			((short*)m_phy_fb)[y * display_width + x] = rgb;
+			*m_phy_write_index = *m_phy_write_index + 1;
 		}
 	}
 	return 0;
@@ -435,6 +440,7 @@ int c_surface::flush_scrren(int left, int top, int right, int bottom)
 		void* d_addr = (char*)m_phy_fb + ((y * display_width + left) * m_color_bytes);
 		memcpy(d_addr, s_addr, (right - left) * m_color_bytes);
 	}
+	*m_phy_write_index = *m_phy_write_index + 1;
 	return 0;
 }
 
@@ -514,6 +520,7 @@ void c_surface_16bits::set_pixel(int x, int y, unsigned int rgb)
 	if (m_is_active && (x < display_width) && (y < display_height))
 	{
 		((unsigned short*)m_phy_fb)[y * (m_display->get_width()) + x] = rgb;
+		*m_phy_write_index = *m_phy_write_index + 1;
 	}
 }
 
@@ -562,6 +569,7 @@ void c_surface_16bits::fill_rect_on_fb(int x0, int y0, int x1, int y1, unsigned
 		x = x0;
 		fb = &((unsigned short*)m_fb)[y0 * m_width + x];
 		phy_fb = &((unsigned short*)m_phy_fb)[y0 * display_width + x];
+		*m_phy_write_index = *m_phy_write_index + 1;
 		for (; x <= x1; x++)
 		{
 			*fb++ = rgb;
diff --git a/doc/HelloSlide.gif b/doc/HelloSlide.gif
new file mode 100644
index 0000000..d92f2b0
Binary files /dev/null and b/doc/HelloSlide.gif differ
diff --git a/doc/UML.md b/doc/UML.md
new file mode 100644
index 0000000..804dd70
--- /dev/null
+++ b/doc/UML.md
@@ -0,0 +1,4 @@
+## Class structure
+![class-structure](uml-class.png)
+## UI process
+![ui-process](uml-ui-process.png)
\ No newline at end of file
diff --git a/doc/uml-class.png b/doc/uml-class.png
new file mode 100644
index 0000000..4da9a95
Binary files /dev/null and b/doc/uml-class.png differ
diff --git a/doc/uml-ui-process.png b/doc/uml-ui-process.png
new file mode 100644
index 0000000..187a7a9
Binary files /dev/null and b/doc/uml-ui-process.png differ
diff --git a/gui/gui_include/my_resource.h b/gui/gui_include/my_resource.h
index cc995bb..dacdd3e 100644
--- a/gui/gui_include/my_resource.h
+++ b/gui/gui_include/my_resource.h
@@ -5,12 +5,7 @@ typedef struct struct_font_info		FONT_INFO;
 typedef struct struct_color_rect	COLOR_RECT;
 typedef struct struct_bitmap_info	BITMAP_INFO;
 
-//Redefine them to meet your need.
-#define DEFAULT_NORMAL_COLOR	GL_RGB(211, 211, 211)
-#define DEFAULT_FOCUS_COLOR		GL_RGB(188, 185, 182)
-#define DEFAULT_PUSH_COLOR		GL_RGB(165, 162, 159)
-#define DEFAULT_FONT_COLOR		GL_RGB(0, 0, 0)
-
+//Rebuild gui library once you change this file
 enum FONT_TYPE
 {
 	FONT_NULL,
@@ -26,14 +21,17 @@ enum FONT_TYPE
 
 enum BITMAP_TYPE
 {
-	BITMAP_UP_BT_NORMAL,
-	BITMAP_UP_BT_FOCUS,
-	BITMAP_DOWN_BT_NORMAL,
-	BITMAP_DOWN_BT_FOCUS,
+	BITMAP_UP_ARROW1,
+	BITMAP_UP_ARROW2,
+	BITMAP_DOWN_ARROW1,
+	BITMAP_DOWN_ARROW2,
 
 	BITMAP_CUSTOM1,
 	BITMAP_CUSTOM2,
 	BITMAP_CUSTOM3,
+	BITMAP_CUSTOM4,
+	BITMAP_CUSTOM5,
+	BITMAP_CUSTOM6,
 
 	BITMAP_MAX
 };
@@ -59,8 +57,8 @@ enum SHAPE_TYPE
 
 enum COLOR_TYPE
 {
-	CTRL_BACK_GROUND,
-	CTRL_FORE_GROUND,
+	WND_BACKCOLOR,
+	WND_FORECOLOR,
 
 	COLOR_MAX
 };
diff --git a/gui/src/button.cpp b/gui/src/button.cpp
index ead300f..84b4317 100644
--- a/gui/src/button.cpp
+++ b/gui/src/button.cpp
@@ -13,8 +13,8 @@ void c_button::pre_create_wnd()
 {
 	m_style = GL_ATTR_VISIBLE | GL_ATTR_FOCUS | ALIGN_HCENTER | ALIGN_VCENTER;
 	m_font_type = c_my_resource::get_font(FONT_DEFAULT);
-	m_font_color = c_my_resource::get_color(CTRL_FORE_GROUND);
-	m_bg_color = c_my_resource::get_color(CTRL_BACK_GROUND);
+	m_font_color = c_my_resource::get_color(WND_FORECOLOR);
+	m_bg_color = c_my_resource::get_color(WND_BACKCOLOR);
 }
 
 void c_button::on_focus()
diff --git a/gui/src/edit.cpp b/gui/src/edit.cpp
index c6f8ad1..e8f1929 100644
--- a/gui/src/edit.cpp
+++ b/gui/src/edit.cpp
@@ -26,8 +26,8 @@ void c_edit::pre_create_wnd()
 {
 	m_style = GL_ATTR_VISIBLE | GL_ATTR_FOCUS | ALIGN_HCENTER | ALIGN_VCENTER | KEY_BOARD_STYLE;
 	m_font_type = c_my_resource::get_font(FONT_DEFAULT);
-	m_font_color = c_my_resource::get_color(CTRL_FORE_GROUND);
-	m_bg_color = c_my_resource::get_color(CTRL_BACK_GROUND);
+	m_font_color = c_my_resource::get_color(WND_FORECOLOR);
+	m_bg_color = c_my_resource::get_color(WND_BACKCOLOR);
 
 	memset(m_str_input, 0, sizeof(m_str_input));
 	memset(m_str, 0, sizeof(m_str));
diff --git a/gui/src/gesture.cpp b/gui/src/gesture.cpp
index d80b6f5..f4ca341 100644
--- a/gui/src/gesture.cpp
+++ b/gui/src/gesture.cpp
@@ -153,7 +153,7 @@ int c_gesture::flip_left()
 	int step = m_down_x - m_move_x;
 	c_rect rc;
 	m_slide_group->get_screen_rect(rc);
-	while(step <= rc.Width())
+	while(step < rc.Width())
 	{
 		s1->get_display()->merge_surface(s2, s1, rc.m_left, rc.m_right, rc.m_top, rc.m_bottom, step);
 		step += FLIP_STEP;
@@ -188,7 +188,7 @@ int c_gesture::flip_right()
 	c_rect rc;
 	m_slide_group->get_screen_rect(rc);
 	int step = rc.Width() - (m_move_x - m_down_x);
-	while(step >= 0)
+	while(step > 0)
 	{
 		s1->get_display()->merge_surface(s1, s2, rc.m_left, rc.m_right, rc.m_top, rc.m_bottom, step);
 		step -= FLIP_STEP;
diff --git a/gui/src/list_box.cpp b/gui/src/list_box.cpp
index 272c1ca..05c8910 100644
--- a/gui/src/list_box.cpp
+++ b/gui/src/list_box.cpp
@@ -19,7 +19,7 @@ void c_list_box::pre_create_wnd()
 	m_style = GL_ATTR_VISIBLE | GL_ATTR_FOCUS | ALIGN_HCENTER | ALIGN_VCENTER;
 	memset(m_item_array, 0, sizeof(m_item_array));
 	m_item_total = 0;
-	m_font_color = c_my_resource::get_color(CTRL_FORE_GROUND);
+	m_font_color = c_my_resource::get_color(WND_FORECOLOR);
 }
 
 void c_list_box::on_init_children()
@@ -27,8 +27,8 @@ void c_list_box::on_init_children()
 	m_item_total = 0;
 	m_selected_item = 0;	
 	m_font_type = c_my_resource::get_font(FONT_DEFAULT);
-	m_font_color = c_my_resource::get_color(CTRL_FORE_GROUND);
-	m_bg_color = c_my_resource::get_color(CTRL_BACK_GROUND);
+	m_font_color = c_my_resource::get_color(WND_FORECOLOR);
+	m_bg_color = c_my_resource::get_color(WND_BACKCOLOR);
 }
 
 void c_list_box::on_focus()
diff --git a/gui/src/slide_group.cpp b/gui/src/slide_group.cpp
index fdc5d21..d4d0073 100644
--- a/gui/src/slide_group.cpp
+++ b/gui/src/slide_group.cpp
@@ -67,16 +67,6 @@ int c_slide_group::add_slide(c_wnd* slide, unsigned short resource_id, short x,
 	new_surface->set_active(false);
 	set_surface(new_surface);
 	slide->connect(this, resource_id ,0 , x, y, width, height, p_child_tree);
-
-	c_rect rect_this, rect_page;
-	get_screen_rect(rect_this);
-	slide->get_screen_rect(rect_page);
-	if (!(rect_page == rect_this))
-	{
-		ASSERT(FALSE);
-		return -2;
-	}
-
 	set_surface(old_surface);
 
 	int i = 0;
@@ -85,7 +75,7 @@ int c_slide_group::add_slide(c_wnd* slide, unsigned short resource_id, short x,
 		if(m_slides[i] == slide)
 		{//slide has lived
 			ASSERT(FALSE);
-			return -3;
+			return -2;
 		}
 		i++;
 	}
@@ -105,7 +95,7 @@ int c_slide_group::add_slide(c_wnd* slide, unsigned short resource_id, short x,
 
 	//no more slide can be add
 	ASSERT(FALSE);
-	return -4;
+	return -3;
 }
 
 int c_slide_group::add_clone_silde(c_wnd* slide, unsigned short resource_id, short x, short y,
@@ -121,16 +111,6 @@ int c_slide_group::add_clone_silde(c_wnd* slide, unsigned short resource_id, sho
 	new_surface->set_active(false);
 	set_surface(new_surface);
 	c_wnd* page_tmp = slide->connect_clone(this,resource_id,0,x,y,width,height,p_child_tree);
-
-	c_rect rect_this, rect_page;
-	get_screen_rect(rect_this);
-	page_tmp->get_screen_rect(rect_page);
-	if (!(rect_page == rect_this))
-	{
-		ASSERT(FALSE);
-		return -2;
-	}
-
 	set_surface(old_surface);
 
 	int i = 0;
@@ -139,7 +119,7 @@ int c_slide_group::add_clone_silde(c_wnd* slide, unsigned short resource_id, sho
 		if(m_slides[i] == page_tmp)
 		{//slide has lived
 			ASSERT(FALSE);
-			return -3;
+			return -2;
 		}
 		i++;
 	}
@@ -159,7 +139,7 @@ int c_slide_group::add_clone_silde(c_wnd* slide, unsigned short resource_id, sho
 
 	//no more slide can be add
 	ASSERT(FALSE);
-	return -4;
+	return -3;
 }
 
 void c_slide_group::disabel_all_slide()
diff --git a/gui/src/spinbox.cpp b/gui/src/spinbox.cpp
index 5997eb9..38f344f 100644
--- a/gui/src/spinbox.cpp
+++ b/gui/src/spinbox.cpp
@@ -22,8 +22,8 @@ void c_spin_box::pre_create_wnd()
 {
 	m_style = GL_ATTR_VISIBLE | GL_ATTR_FOCUS | ALIGN_HCENTER | ALIGN_VCENTER;
 	m_font_type = c_my_resource::get_font(FONT_DEFAULT);
-	m_bg_color = c_my_resource::get_color(CTRL_BACK_GROUND);
-	m_font_color = c_my_resource::get_color(CTRL_FORE_GROUND);
+	m_bg_color = c_my_resource::get_color(WND_BACKCOLOR);
+	m_font_color = c_my_resource::get_color(WND_FORECOLOR);
 
 	m_max = 6;
 	m_min = 1;
@@ -122,15 +122,15 @@ void c_spin_box::show_arrow_button()
 	fill_rect(m_bt_up_rect.m_left, m_bt_up_rect.m_top, m_bt_down_rect.m_right, m_bt_down_rect.m_bottom, GL_RGB(99,108,124));
 
 	m_bt_up.connect(this, ID_BT_ARROW_UP, 0, 0, m_wnd_rect.Height(), m_bt_up_rect.Width(),m_bt_up_rect.Height());
-	m_bt_up.set_bitmap(c_my_resource::get_bmp(BITMAP_UP_BT_NORMAL));
-	m_bt_up.set_focus_bitmap(c_my_resource::get_bmp(BITMAP_UP_BT_FOCUS));
-	m_bt_up.set_pushed_bitmap(c_my_resource::get_bmp(BITMAP_UP_BT_FOCUS));
+	m_bt_up.set_bitmap(c_my_resource::get_bmp(BITMAP_UP_ARROW1));
+	m_bt_up.set_focus_bitmap(c_my_resource::get_bmp(BITMAP_UP_ARROW2));
+	m_bt_up.set_pushed_bitmap(c_my_resource::get_bmp(BITMAP_UP_ARROW2));
 	m_bt_up.show_window();
 
 	m_bt_down.connect(this, ID_BT_ARROW_DOWN, 0, m_bt_up_rect.Width(), m_wnd_rect.Height(), m_bt_down_rect.Width(),m_bt_down_rect.Height());
-	m_bt_down.set_bitmap(c_my_resource::get_bmp(BITMAP_DOWN_BT_NORMAL));
-	m_bt_down.set_focus_bitmap(c_my_resource::get_bmp(BITMAP_DOWN_BT_FOCUS));
-	m_bt_down.set_pushed_bitmap(c_my_resource::get_bmp(BITMAP_DOWN_BT_FOCUS));
+	m_bt_down.set_bitmap(c_my_resource::get_bmp(BITMAP_DOWN_ARROW1));
+	m_bt_down.set_focus_bitmap(c_my_resource::get_bmp(BITMAP_DOWN_ARROW2));
+	m_bt_down.set_pushed_bitmap(c_my_resource::get_bmp(BITMAP_DOWN_ARROW2));
 	m_bt_down.show_window();
 }
 
diff --git a/sync_build.bat b/sync_build.bat
index 49f056d..4f0cc52 100644
--- a/sync_build.bat
+++ b/sync_build.bat
@@ -24,3 +24,5 @@ set raw_data=[{^
 
 curl.exe --include --request POST --header "Content-Type: application/json" --data-binary^
  "%raw_data%" "%url%"
+
+exit /B 0
\ No newline at end of file