diff --git a/rtgui/common/rtgui_system.c b/rtgui/common/rtgui_system.c
index b64940a9c82ef02919663ffda5147c152c9a77b7..b2f86ac96e39766dbfb9d7958a16da773cfb7639 100644
--- a/rtgui/common/rtgui_system.c
+++ b/rtgui/common/rtgui_system.c
@@ -154,11 +154,19 @@ static void rtgui_event_dump(rt_thread_t tid, rtgui_event_t* event)
 			struct rtgui_event_win_create *create = (struct rtgui_event_win_create*)event;
 
 			rt_kprintf(" win: %s at (x1:%d, y1:%d, x2:%d, y2:%d)",
+#ifdef RTGUI_USING_SMALL_SIZE
+				create->wid->title,
+				RTGUI_WIDGET(create->wid)->extent.x1,
+				RTGUI_WIDGET(create->wid)->extent.y1,
+				RTGUI_WIDGET(create->wid)->extent.x2,
+				RTGUI_WIDGET(create->wid)->extent.y2);
+#else
 				create->title,
 				create->extent.x1,
 				create->extent.y1,
 				create->extent.x2,
 				create->extent.y2);
+#endif
 		}
 		break;
 
@@ -340,6 +348,7 @@ struct rtgui_widget* rtgui_thread_get_widget()
 
 rt_err_t rtgui_thread_send(rt_thread_t tid, rtgui_event_t* event, rt_size_t event_size)
 {
+	rt_err_t result;
 	struct rtgui_thread* thread;
 
 	rtgui_event_dump(tid, event);
@@ -350,11 +359,16 @@ rt_err_t rtgui_thread_send(rt_thread_t tid, rtgui_event_t* event, rt_size_t even
 	thread = (struct rtgui_thread*) (tid->user_data);
 	if (thread == RT_NULL) return -RT_ERROR;
 
-	return rt_mq_send(thread->mq, event, event_size);
+	result = rt_mq_send(thread->mq, event, event_size);
+	if (result != RT_EOK)
+		rt_kprintf("send event failed\n");
+
+	return result;
 }
 
 rt_err_t rtgui_thread_send_urgent(rt_thread_t tid, rtgui_event_t* event, rt_size_t event_size)
 {
+	rt_err_t result;
 	struct rtgui_thread* thread;
 
 	rtgui_event_dump(tid, event);
@@ -364,7 +378,11 @@ rt_err_t rtgui_thread_send_urgent(rt_thread_t tid, rtgui_event_t* event, rt_size
 	thread = (struct rtgui_thread*) (tid->user_data);
 	if (thread == RT_NULL) return -RT_ERROR;
 
-	return rt_mq_urgent(thread->mq, event, event_size);
+	result = rt_mq_urgent(thread->mq, event, event_size);
+	if (result != RT_EOK)
+		rt_kprintf("send ergent event failed\n");
+
+	return result;
 }
 
 rt_err_t rtgui_thread_send_sync(rt_thread_t tid, rtgui_event_t* event, rt_size_t event_size)
@@ -387,7 +405,11 @@ rt_err_t rtgui_thread_send_sync(rt_thread_t tid, rtgui_event_t* event, rt_size_t
 
 	event->ack = &ack_mb;
 	r = rt_mq_send(thread->mq, event, event_size);
-	if (r != RT_EOK) goto __return;
+	if (r != RT_EOK) 
+	{
+		rt_kprintf("send sync event failed\n");
+		goto __return;
+	}
 
 	r = rt_mb_recv(&ack_mb, (rt_uint32_t*)&ack_status, RT_WAITING_FOREVER);
 	if ( r!= RT_EOK) goto __return;
diff --git a/rtgui/include/rtgui/event.h b/rtgui/include/rtgui/event.h
index 50ad4887e2d18b161838a6f724c1203ca4247943..1b0a6d1022ad9f01975b77c080788542209e1b8d 100644
--- a/rtgui/include/rtgui/event.h
+++ b/rtgui/include/rtgui/event.h
@@ -77,7 +77,9 @@ enum {
 struct rtgui_event
 {
 	/* the event type */
-	rt_uint32_t type;
+	rt_uint16_t type;
+	/* user field of event */
+	rt_uint16_t user;
 
 	/* the event sender */
 	rt_thread_t sender;
@@ -91,6 +93,7 @@ typedef struct rtgui_event rtgui_event_t;
 #define RTGUI_EVENT_INIT(e, t)	do		\
 {										\
 	(e)->type = (t);					\
+	(e)->user = 0;						\
 	(e)->sender = rt_thread_self();		\
 	(e)->ack = RT_NULL;					\
 } while (0)
@@ -172,16 +175,15 @@ struct rtgui_event_win_create
 {
 	struct rtgui_event parent;
 
-	/* the window flag */
-	rt_uint32_t flag;
-
+#ifndef RTGUI_USING_SMALL_SIZE
 	/* the window title */
 	rt_uint8_t title[RTGUI_NAME_MAX];
+	/* the window extent */
+	struct rtgui_rect extent;
+#endif
 
 	/* the window id */
 	rtgui_win_t* wid;
-	/* the window extent */
-	struct rtgui_rect extent;
 };
 
 struct rtgui_event_win_move
@@ -332,9 +334,9 @@ struct rtgui_event_kbd
 
 	rtgui_win_t* wid;		/* destination window */
 
-	RTGUI_KBD_TYPE type;	/* key down or up */
-	RTGUI_KBD_KEY key;		/* current key */
-	RTGUI_KBD_MOD mod;		/* current key modifiers */
+	rt_uint16_t type;		/* key down or up */
+	rt_uint16_t key;		/* current key */
+	rt_uint16_t mod;		/* current key modifiers */
 	rt_uint16_t unicode;	/* translated character */
 };
 #define RTGUI_KBD_IS_SET_CTRL(e)	((e)->mod & (RTGUI_KMOD_LCTRL | RTGUI_KMOD_RCTRL)))
@@ -357,9 +359,6 @@ struct rtgui_event_command
 	/* command id */
 	rt_int32_t command_id;
 
-	/* command integer */
-	rt_int32_t command_int;
-
 	/* command string */
 	char command_string[RTGUI_NAME_MAX];
 };
diff --git a/rtgui/server/server.c b/rtgui/server/server.c
index 43694198e834943652e0489c0edca5b38f478847..4c72781f66b663be1c374edc40088b55a32d2a7b 100644
--- a/rtgui/server/server.c
+++ b/rtgui/server/server.c
@@ -483,7 +483,7 @@ static void rtgui_server_entry(void* parameter)
 #ifdef RTGUI_USING_SMALL_SIZE
 	/* create rtgui server msgq */
 	rtgui_server_mq = rt_mq_create("rtgui",
-		64, 8, RT_IPC_FLAG_FIFO);
+		32, 8, RT_IPC_FLAG_FIFO);
 #else
 	/* create rtgui server msgq */
 	rtgui_server_mq = rt_mq_create("rtgui",
diff --git a/rtgui/server/topwin.c b/rtgui/server/topwin.c
index c8f2b903dcac2757ad1de34a07492a2ad43bf657..059b06d4a6317c809216a3fab52dafb933cf65a7 100644
--- a/rtgui/server/topwin.c
+++ b/rtgui/server/topwin.c
@@ -70,14 +70,18 @@ rt_err_t rtgui_topwin_add(struct rtgui_event_win_create* event)
 	if (topwin == RT_NULL) return -RT_ERROR;
 
 	topwin->wid 	= event->wid;
+#ifdef RTGUI_USING_SMALL_SIZE
+	topwin->extent	= RTGUI_WIDGET(event->wid)->extent;
+#else
 	topwin->extent 	= event->extent;
+#endif
 	topwin->tid 	= event->parent.sender;
 
 	topwin->flag 	= 0;
-	if (event->flag & RTGUI_WIN_STYLE_NO_TITLE) topwin->flag |= WINTITLE_NO;
-	if (event->flag & RTGUI_WIN_STYLE_CLOSEBOX) topwin->flag |= WINTITLE_CLOSEBOX;
-	if (!(event->flag & RTGUI_WIN_STYLE_NO_BORDER)) topwin->flag |= WINTITLE_BORDER;
-	if (event->flag & RTGUI_WIN_STYLE_NO_FOCUS) topwin->flag |= WINTITLE_NOFOCUS;
+	if (event->parent.user & RTGUI_WIN_STYLE_NO_TITLE) topwin->flag |= WINTITLE_NO;
+	if (event->parent.user & RTGUI_WIN_STYLE_CLOSEBOX) topwin->flag |= WINTITLE_CLOSEBOX;
+	if (!(event->parent.user & RTGUI_WIN_STYLE_NO_BORDER)) topwin->flag |= WINTITLE_BORDER;
+	if (event->parent.user & RTGUI_WIN_STYLE_NO_FOCUS) topwin->flag |= WINTITLE_NOFOCUS;
 
 	if(!(topwin->flag & WINTITLE_NO) || (topwin->flag & WINTITLE_BORDER))
 	{
@@ -93,7 +97,11 @@ rt_err_t rtgui_topwin_add(struct rtgui_event_win_create* event)
 		/* add title rect */
 		if (!(topwin->flag & WINTITLE_NO)) rect.y1 -= WINTITLE_HEIGHT;
 
+#ifdef RTGUI_USING_SMALL_SIZE
+		topwin->title = rtgui_wintitle_create(event->wid->title);
+#else
 		topwin->title = rtgui_wintitle_create(event->title);
+#endif
 		rtgui_widget_set_rect(RTGUI_WIDGET(topwin->title), &rect);
 
 		/* update clip info */
@@ -289,9 +297,7 @@ void rtgui_topwin_raise(struct rtgui_win* wid, rt_thread_t sender)
 
 		/* send clip info event */
 		count = 0;
-		for (node = _rtgui_topwin_show_list.next;
-			node != &(topwin->list);
-			node  = node->next)
+		for (node = _rtgui_topwin_show_list.next; node != RT_NULL; node  = node->next)
 		{
 			struct rtgui_topwin* wnd = rtgui_list_entry(node, struct rtgui_topwin, list);
 
@@ -1020,12 +1026,13 @@ void rtgui_topwin_get_clipinfo(struct rtgui_rect* rect_list, rt_int32_t count)
 		topwin = rtgui_list_entry(node, struct rtgui_topwin, list);
 
 		if (topwin->title != RT_NULL) 
-			rtgui_widget_get_rect(RTGUI_WIDGET(topwin->title), rect);
-		else *rect = topwin->extent;
+			*rect = RTGUI_WIDGET(topwin->title)->extent;
+		else 
+			*rect = topwin->extent;
 
 		rect  ++;
 		count --;
-		if (count < 0) break;
+		if (count <= 0) break;
 	}
 	rt_sem_release(&_rtgui_topwin_lock);
 }
diff --git a/rtgui/widgets/toplevel.c b/rtgui/widgets/toplevel.c
index cd4144b4c91a489361d0e0c9f601fbe499cf1234..35284383caf6f71d4e0bc6a6281b192cc70708cf 100644
--- a/rtgui/widgets/toplevel.c
+++ b/rtgui/widgets/toplevel.c
@@ -37,12 +37,13 @@ static void _rtgui_toplevel_constructor(rtgui_toplevel_t *toplevel)
 static void _rtgui_toplevel_destructor(rtgui_toplevel_t* toplevel)
 {
 	/* release external clip info */
-	rtgui_free(toplevel->external_clip_rect);
-
 	toplevel->drawing = 0;
-	rtgui_free(toplevel->external_clip_rect);
-	toplevel->external_clip_rect = RT_NULL;
-	toplevel->external_clip_size = 0;
+	if (toplevel->external_clip_size > 0)
+	{
+		rtgui_free(toplevel->external_clip_rect);
+		toplevel->external_clip_rect = RT_NULL;
+		toplevel->external_clip_size = 0;
+	}
 }
 
 rtgui_type_t *rtgui_toplevel_type_get(void)
@@ -115,6 +116,10 @@ rt_bool_t rtgui_toplevel_event_handler(rtgui_widget_t* widget, rtgui_event_t* ev
 	return RT_FALSE;
 }
 
+#include <rtgui/widgets/window.h>
+#include <rtgui/widgets/workbench.h>
+#include <rtgui/widgets/title.h>
+
 void rtgui_toplevel_handle_clip(struct rtgui_toplevel* top,
 	struct rtgui_event_clip_info* info)
 {
diff --git a/rtgui/widgets/window.c b/rtgui/widgets/window.c
index 33b51126d4d05975a808b68679ccafc9ee5d1aa4..1f6dfdcc343d6cbdf01e4ea0c5dd19b2d71a8ac3 100644
--- a/rtgui/widgets/window.c
+++ b/rtgui/widgets/window.c
@@ -77,10 +77,12 @@ static rt_bool_t _rtgui_win_create_in_server(rtgui_win_t* win)
 		}
 
 		/* send win create event to server */
-		ecreate.wid 	= win;
-		ecreate.extent 	= RTGUI_WIDGET(win)->extent;
-		ecreate.flag 	= win->style;
+		ecreate.wid 		= win;
+		ecreate.parent.user	= win->style;
+#ifndef RTGUI_USING_SMALL_SIZE
+		ecreate.extent 		= RTGUI_WIDGET(win)->extent;
 		rt_strncpy((char*)ecreate.title, (char*)win->title, RTGUI_NAME_MAX);
+#endif
 
 		if (rtgui_thread_send_sync(server, RTGUI_EVENT(&ecreate),
 			sizeof(struct rtgui_event_win_create)) != RT_EOK)