diff --git a/build/vc2013/nana.sln b/build/vc2013/nana.sln
index 6baefd4a..f92bfa92 100644
--- a/build/vc2013/nana.sln
+++ b/build/vc2013/nana.sln
@@ -8,13 +8,19 @@ EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Win32 = Debug|Win32
+		Debug|x64 = Debug|x64
 		Release|Win32 = Release|Win32
+		Release|x64 = Release|x64
 	EndGlobalSection
 	GlobalSection(ProjectConfigurationPlatforms) = postSolution
 		{25B21068-491B-4A9F-B99F-6C27BF31BAAD}.Debug|Win32.ActiveCfg = Debug|Win32
 		{25B21068-491B-4A9F-B99F-6C27BF31BAAD}.Debug|Win32.Build.0 = Debug|Win32
+		{25B21068-491B-4A9F-B99F-6C27BF31BAAD}.Debug|x64.ActiveCfg = Debug|x64
+		{25B21068-491B-4A9F-B99F-6C27BF31BAAD}.Debug|x64.Build.0 = Debug|x64
 		{25B21068-491B-4A9F-B99F-6C27BF31BAAD}.Release|Win32.ActiveCfg = Release|Win32
 		{25B21068-491B-4A9F-B99F-6C27BF31BAAD}.Release|Win32.Build.0 = Release|Win32
+		{25B21068-491B-4A9F-B99F-6C27BF31BAAD}.Release|x64.ActiveCfg = Release|x64
+		{25B21068-491B-4A9F-B99F-6C27BF31BAAD}.Release|x64.Build.0 = Release|x64
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
diff --git a/build/vc2013/nana.vcxproj b/build/vc2013/nana.vcxproj
index d6b6e976..17ac7ac4 100644
--- a/build/vc2013/nana.vcxproj
+++ b/build/vc2013/nana.vcxproj
@@ -5,10 +5,18 @@
       <Configuration>Debug</Configuration>
       <Platform>Win32</Platform>
     </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|x64">
+      <Configuration>Debug</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
     <ProjectConfiguration Include="Release|Win32">
       <Configuration>Release</Configuration>
       <Platform>Win32</Platform>
     </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|x64">
+      <Configuration>Release</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
   </ItemGroup>
   <PropertyGroup Label="Globals">
     <ProjectGuid>{25B21068-491B-4A9F-B99F-6C27BF31BAAD}</ProjectGuid>
@@ -22,6 +30,12 @@
     <PlatformToolset>v120</PlatformToolset>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
+    <ConfigurationType>StaticLibrary</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <PlatformToolset>v120</PlatformToolset>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
     <ConfigurationType>StaticLibrary</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
@@ -29,21 +43,48 @@
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
+    <ConfigurationType>StaticLibrary</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <PlatformToolset>v120</PlatformToolset>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
   </ImportGroup>
   <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
     <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
   </ImportGroup>
+  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="PropertySheets">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
   <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
     <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
   </ImportGroup>
+  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="PropertySheets">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
   <PropertyGroup Label="UserMacros" />
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
     <OutDir>../bin/vc2013/</OutDir>
+    <IncludePath>..\..\include;$(IncludePath)</IncludePath>
+    <SourcePath>..\..\source;$(VC_SourcePath);</SourcePath>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <IncludePath>..\..\include;$(IncludePath)</IncludePath>
+    <SourcePath>..\..\source;$(VC_SourcePath);</SourcePath>
+    <OutDir>../bin/vc2013/</OutDir>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
     <OutDir>../bin/vc2013/</OutDir>
+    <IncludePath>..\..\include;$(IncludePath)</IncludePath>
+    <SourcePath>..\..\source;$(VC_SourcePath);</SourcePath>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <IncludePath>..\..\include;$(IncludePath)</IncludePath>
+    <SourcePath>..\..\source;$(VC_SourcePath);</SourcePath>
+    <OutDir>../bin/vc2013/</OutDir>
   </PropertyGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
     <ClCompile>
@@ -58,7 +99,23 @@
       <GenerateDebugInformation>true</GenerateDebugInformation>
     </Link>
     <Lib>
-      <OutputFile>$(OutDir)\nana_debug.lib</OutputFile>
+      <OutputFile>$(OutDir)\nana_$(ConfigurationName)_$(PlatformShortName).lib</OutputFile>
+    </Lib>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <ClCompile>
+      <PrecompiledHeader>
+      </PrecompiledHeader>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>Disabled</Optimization>
+      <PreprocessorDefinitions>WIN32;_DEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+    </ClCompile>
+    <Link>
+      <SubSystem>Windows</SubSystem>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+    </Link>
+    <Lib>
+      <OutputFile>$(OutDir)\nana_$(ConfigurationName)_$(PlatformShortName).lib</OutputFile>
     </Lib>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
@@ -78,7 +135,27 @@
       <OptimizeReferences>true</OptimizeReferences>
     </Link>
     <Lib>
-      <OutputFile>$(OutDir)\nana_release.lib</OutputFile>
+      <OutputFile>$(OutDir)\nana_$(ConfigurationName)_$(PlatformShortName).lib</OutputFile>
+    </Lib>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <ClCompile>
+      <WarningLevel>Level3</WarningLevel>
+      <PrecompiledHeader>
+      </PrecompiledHeader>
+      <Optimization>MaxSpeed</Optimization>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <PreprocessorDefinitions>WIN32;NDEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+    </ClCompile>
+    <Link>
+      <SubSystem>Windows</SubSystem>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+    </Link>
+    <Lib>
+      <OutputFile>$(OutDir)\nana_$(ConfigurationName)_$(PlatformShortName).lib</OutputFile>
     </Lib>
   </ItemDefinitionGroup>
   <ItemGroup>