diff --git a/core/actions/Animation.cpp b/core/actions/Animation.cpp
index 97e1f3b8..4f18f472 100644
--- a/core/actions/Animation.cpp
+++ b/core/actions/Animation.cpp
@@ -57,7 +57,7 @@ void easy2d::Animation::SetInterval(float interval)
 
 void easy2d::Animation::Add(Image * frame)
 {
-	WARN_IF(frame == nullptr, "Animation::Add failed, frame Is nullptr.");
+	E2D_WARNING_IF(frame == nullptr, "Animation::Add failed, frame Is nullptr.");
 	if (frame)
 	{
 		frames_.push_back(frame);
diff --git a/core/actions/Loop.cpp b/core/actions/Loop.cpp
index 774a6328..8b3efe73 100644
--- a/core/actions/Loop.cpp
+++ b/core/actions/Loop.cpp
@@ -25,7 +25,7 @@ easy2d::Loop::Loop(Action * action, int times /* = -1 */)
 	, times_(0)
 	, total_times_(times)
 {
-	WARN_IF(action == nullptr, "Loop NULL pointer exception!");
+	E2D_WARNING_IF(action == nullptr, "Loop NULL pointer exception!");
 
 	if (action)
 	{
diff --git a/core/e2daction.h b/core/e2daction.h
index 7e943447..5f898b49 100644
--- a/core/e2daction.h
+++ b/core/e2daction.h
@@ -188,7 +188,7 @@ namespace easy2d
 		// 获取该动作的倒转
 		virtual MoveTo * Reverse() const override
 		{
-			WARN("Reverse() not supported in MoveTo");
+			E2D_WARNING("Reverse() not supported in MoveTo");
 			return nullptr;
 		}
 
@@ -257,7 +257,7 @@ namespace easy2d
 		// 获取该动作的倒转
 		virtual JumpTo * Reverse() const override
 		{
-			WARN("Reverse() not supported in JumpTo");
+			E2D_WARNING("Reverse() not supported in JumpTo");
 			return nullptr;
 		}
 
@@ -333,7 +333,7 @@ namespace easy2d
 		// 获取该动作的倒转
 		virtual ScaleTo * Reverse() const override
 		{
-			WARN("Reverse() not supported in ScaleTo");
+			E2D_WARNING("Reverse() not supported in ScaleTo");
 			return nullptr;
 		}
 
@@ -396,7 +396,7 @@ namespace easy2d
 		// 获取该动作的倒转
 		virtual OpacityTo * Reverse() const override
 		{
-			WARN("Reverse() not supported in OpacityTo");
+			E2D_WARNING("Reverse() not supported in OpacityTo");
 			return nullptr;
 		}
 
@@ -488,7 +488,7 @@ namespace easy2d
 		// 获取该动作的倒转
 		virtual RotateTo * Reverse() const override
 		{
-			WARN("Reverse() not supported in RotateTo");
+			E2D_WARNING("Reverse() not supported in RotateTo");
 			return nullptr;
 		}
 
diff --git a/core/e2dmacros.h b/core/e2dmacros.h
index 3be7ea86..91f3de95 100644
--- a/core/e2dmacros.h
+++ b/core/e2dmacros.h
@@ -94,24 +94,6 @@
 #endif
 
 
-#ifndef WARN
-#	if defined( DEBUG ) || defined( _DEBUG )
-#		define WARN(message, ...) do { fwprintf(stderr, L"Warning: " _CRT_WIDE(#message) L"\n", __VA_ARGS__); } while(0)
-#	else
-#		define WARN(message, ...) ((void)0)
-#	endif
-#endif
-
-
-#ifndef WARN_IF
-#	if defined( DEBUG ) || defined( _DEBUG )
-#		define WARN_IF(expression, message, ...) do { if (expression) { fwprintf(stderr, L"Warning: " _CRT_WIDE(#message) L"\n", __VA_ARGS__); } } while(0)
-#	else
-#		define WARN_IF(expression, message, ...) ((void)0)
-#	endif
-#endif
-
-
 #if _MSC_VER >= 1800
 #	define E2D_OP_EXPLICIT explicit
 #else
@@ -144,3 +126,59 @@
 #ifdef min
 #	undef min
 #endif
+
+
+#ifdef UNICODE
+#	define OutputDebugStringEx OutputDebugStringExW
+#else
+#	define OutputDebugStringEx OutputDebugStringExA
+#endif
+
+
+#ifndef E2D_WARNING
+#	if defined( DEBUG ) || defined( _DEBUG )
+#		define E2D_WARNING(msg, ...) do { OutputDebugStringExW(L"Warning: " _CRT_WIDE(#msg) L"\n", __VA_ARGS__); } while(0)
+#	else
+#		define E2D_WARNING(msg, ...) ((void)0)
+#	endif
+#endif
+
+
+#ifndef E2D_WARNING_IF
+#	if defined( DEBUG ) || defined( _DEBUG )
+#		define E2D_WARNING_IF(exp, msg, ...) do { if (exp) { OutputDebugStringExW(L"Warning: " _CRT_WIDE(#msg) L"\n", __VA_ARGS__); } } while(0)
+#	else
+#		define E2D_WARNING_IF(exp, msg, ...) ((void)0)
+#	endif
+#endif
+
+
+void OutputDebugStringExW(LPCWSTR pszOutput, ...)
+{
+	va_list args = NULL;
+	va_start(args, pszOutput);
+
+	size_t nLen = _vscwprintf(pszOutput, args) + 1;
+	const wchar_t* psBuffer = new wchar_t[nLen];
+	_vsnwprintf_s(psBuffer, nLen, nLen, pszOutput, args);
+
+	va_end(args);
+
+	OutputDebugStringW(psBuffer);
+	delete [] psBuffer;
+}
+
+void OutputDebugStringExA(LPCSTR pszOutput, ...)
+{
+	va_list args = NULL;
+	va_start(args, pszOutput);
+
+	size_t nLen = _vscprintf(pszOutput, args) + 1;
+	const char* psBuffer = new char[nLen];
+	_vsnprintf_s(psBuffer, nLen, nLen, pszOutput, args);
+
+	va_end(args);
+
+	OutputDebugStringA(psBuffer);
+	delete [] psBuffer;
+}
diff --git a/core/modules/Game.cpp b/core/modules/Game.cpp
index 395ba91d..7e7f48fe 100644
--- a/core/modules/Game.cpp
+++ b/core/modules/Game.cpp
@@ -151,13 +151,13 @@ void easy2d::Game::EnterScene(Scene * scene, Transition * transition)
 {
 	if (scene == nullptr)
 	{
-		WARN("Next scene is null pointer!");
+		E2D_WARNING("Next scene is null pointer!");
 		return;
 	}
 
 	if (next_scene_ != nullptr)
 	{
-		WARN("Scene is transitioning...");
+		E2D_WARNING("Scene is transitioning...");
 		return;
 	}
 
@@ -393,7 +393,7 @@ easy2d::Rect easy2d::Game::Locate(int width, int height)
 	height = static_cast<int>(rect.bottom - rect.top);
 
 	// 当输入的窗口大小比分辨率大时，给出警告
-	WARN_IF(max_width < width || max_height < height, "The window Is larger than screen!");
+	E2D_WARNING_IF(max_width < width || max_height < height, "The window Is larger than screen!");
 	width = std::min(width, max_width);
 	height = std::min(height, max_height);
 
diff --git a/core/objects/Image.cpp b/core/objects/Image.cpp
index c74191e7..ec15f313 100644
--- a/core/objects/Image.cpp
+++ b/core/objects/Image.cpp
@@ -69,7 +69,7 @@ bool easy2d::Image::Load(const Resource& res)
 {
 	if (!Image::CacheBitmap(res))
 	{
-		WARN("Load Image from file failed!");
+		E2D_WARNING("Load Image from file failed!");
 		return false;
 	}
 
@@ -79,14 +79,14 @@ bool easy2d::Image::Load(const Resource& res)
 
 bool easy2d::Image::Load(const String & file_name)
 {
-	WARN_IF(file_name.IsEmpty(), "Image Load failed! Invalid file name.");
+	E2D_WARNING_IF(file_name.IsEmpty(), "Image Load failed! Invalid file name.");
 
 	if (file_name.IsEmpty())
 		return false;
 
 	if (!Image::CacheBitmap(file_name))
 	{
-		WARN("Load Image from file failed!");
+		E2D_WARNING("Load Image from file failed!");
 		return false;
 	}
 
diff --git a/core/objects/Node.cpp b/core/objects/Node.cpp
index 40ff9820..11a6fed0 100644
--- a/core/objects/Node.cpp
+++ b/core/objects/Node.cpp
@@ -595,7 +595,7 @@ void easy2d::Node::SetBorderColor(const Color & color)
 
 void easy2d::Node::AddChild(Node * child, int order)
 {
-	WARN_IF(child == nullptr, "Node::AddChild NULL pointer exception.");
+	E2D_WARNING_IF(child == nullptr, "Node::AddChild NULL pointer exception.");
 
 	if (child)
 	{
@@ -699,7 +699,7 @@ void easy2d::Node::RemoveFromParent()
 
 bool easy2d::Node::RemoveChild(Node * child)
 {
-	WARN_IF(child == nullptr, "Node::RemoveChildren NULL pointer exception.");
+	E2D_WARNING_IF(child == nullptr, "Node::RemoveChildren NULL pointer exception.");
 
 	if (children_.empty())
 	{
@@ -766,7 +766,7 @@ void easy2d::Node::RemoveAllChildren()
 
 void easy2d::Node::RunAction(Action * action)
 {
-	WARN_IF(action == nullptr, "Action NULL pointer exception!");
+	E2D_WARNING_IF(action == nullptr, "Action NULL pointer exception!");
 
 	if (action)
 	{
@@ -1041,7 +1041,7 @@ void easy2d::Node::SetVisible(bool value)
 
 void easy2d::Node::SetName(const String& name)
 {
-	WARN_IF(name.IsEmpty(), "Invalid Node name.");
+	E2D_WARNING_IF(name.IsEmpty(), "Invalid Node name.");
 
 	if (!name.IsEmpty() && name_ != name)
 	{
diff --git a/core/objects/Text.cpp b/core/objects/Text.cpp
index da0f28ef..972f702f 100644
--- a/core/objects/Text.cpp
+++ b/core/objects/Text.cpp
@@ -396,7 +396,7 @@ void easy2d::Text::CreateLayout()
 
 	if (text_format_ == nullptr)
 	{
-		WARN("Text::CreateLayout failed! text_format_ NULL pointer exception.");
+		E2D_WARNING("Text::CreateLayout failed! text_format_ NULL pointer exception.");
 		return;
 	}
 	
diff --git a/core/tools/Music.cpp b/core/tools/Music.cpp
index eee9ab45..229a587e 100644
--- a/core/tools/Music.cpp
+++ b/core/tools/Music.cpp
@@ -24,13 +24,13 @@
 
 inline bool TraceError(wchar_t* prompt)
 {
-	WARN("Music error: %s failed!", prompt);
+	E2D_WARNING("Music error: %s failed!", prompt);
 	return false;
 }
 
 inline bool TraceError(wchar_t* prompt, HRESULT hr)
 {
-	WARN("Music error: %s (%#X)", prompt, hr);
+	E2D_WARNING("Music error: %s (%#X)", prompt, hr);
 	return false;
 }
 
@@ -339,7 +339,7 @@ bool easy2d::Music::Load(const easy2d::String & file_path)
 	File music_file;
 	if (!music_file.Open(file_path))
 	{
-		WARN("Music::Load error: File not found.");
+		E2D_WARNING("Music::Load error: File not found.");
 		return false;
 	}
 
@@ -400,13 +400,13 @@ bool easy2d::Music::Play(int loop_count)
 {
 	if (!opened_)
 	{
-		WARN("Music::Play Failed: Music must be opened first!");
+		E2D_WARNING("Music::Play Failed: Music must be opened first!");
 		return false;
 	}
 
 	if (voice_ == nullptr)
 	{
-		WARN("Music::Play Failed: IXAudio2SourceVoice Null pointer exception!");
+		E2D_WARNING("Music::Play Failed: IXAudio2SourceVoice Null pointer exception!");
 		return false;
 	}
 
diff --git a/core/utils/String.cpp b/core/utils/String.cpp
index 0c7db0d1..7e948caf 100644
--- a/core/utils/String.cpp
+++ b/core/utils/String.cpp
@@ -483,13 +483,8 @@ int easy2d::String::Find(const String & str, int offset) const
 {
 	size_t index;
 	if ((index = string_.find(str.string_, size_t(offset))) == std::wstring::npos)
-	{
 		return -1;
-	}
-	else
-	{
-		return static_cast<int>(index);
-	}
+	return static_cast<int>(index);
 }
 
 void easy2d::String::Clear()