add Windows x64 (WIN64) mode and make buildable on MSVC
diff --git a/vsprojects/grpc.sln b/vsprojects/grpc.sln
index 1f286f5..ab47b2c 100644
--- a/vsprojects/grpc.sln
+++ b/vsprojects/grpc.sln
@@ -1,7 +1,6 @@
-
 Microsoft Visual Studio Solution File, Format Version 12.00
 # Visual Studio 2013
-VisualStudioVersion = 12.0.21005.1
+VisualStudioVersion = 12.0.30723.0
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "gpr", "gpr\gpr.vcxproj", "{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}"
 EndProject
@@ -49,41 +48,75 @@
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Win32 = Debug|Win32
+		Debug|x64 = Debug|x64
 		Release|Win32 = Release|Win32
+		Release|x64 = Release|x64
 	EndGlobalSection
 	GlobalSection(ProjectConfigurationPlatforms) = postSolution
 		{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}.Debug|Win32.ActiveCfg = Debug|Win32
 		{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}.Debug|Win32.Build.0 = Debug|Win32
+		{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}.Debug|x64.ActiveCfg = Debug|x64
+		{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}.Debug|x64.Build.0 = Debug|x64
 		{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}.Release|Win32.ActiveCfg = Release|Win32
 		{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}.Release|Win32.Build.0 = Release|Win32
+		{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}.Release|x64.ActiveCfg = Release|x64
+		{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}.Release|x64.Build.0 = Release|x64
 		{EAB0A629-17A9-44DB-B5FF-E91A721FE037}.Debug|Win32.ActiveCfg = Debug|Win32
 		{EAB0A629-17A9-44DB-B5FF-E91A721FE037}.Debug|Win32.Build.0 = Debug|Win32
+		{EAB0A629-17A9-44DB-B5FF-E91A721FE037}.Debug|x64.ActiveCfg = Debug|x64
+		{EAB0A629-17A9-44DB-B5FF-E91A721FE037}.Debug|x64.Build.0 = Debug|x64
 		{EAB0A629-17A9-44DB-B5FF-E91A721FE037}.Release|Win32.ActiveCfg = Release|Win32
 		{EAB0A629-17A9-44DB-B5FF-E91A721FE037}.Release|Win32.Build.0 = Release|Win32
+		{EAB0A629-17A9-44DB-B5FF-E91A721FE037}.Release|x64.ActiveCfg = Release|x64
+		{EAB0A629-17A9-44DB-B5FF-E91A721FE037}.Release|x64.Build.0 = Release|x64
 		{29D16885-7228-4C31-81ED-5F9187C7F2A9}.Debug|Win32.ActiveCfg = Debug|Win32
 		{29D16885-7228-4C31-81ED-5F9187C7F2A9}.Debug|Win32.Build.0 = Debug|Win32
+		{29D16885-7228-4C31-81ED-5F9187C7F2A9}.Debug|x64.ActiveCfg = Debug|x64
+		{29D16885-7228-4C31-81ED-5F9187C7F2A9}.Debug|x64.Build.0 = Debug|x64
 		{29D16885-7228-4C31-81ED-5F9187C7F2A9}.Release|Win32.ActiveCfg = Release|Win32
 		{29D16885-7228-4C31-81ED-5F9187C7F2A9}.Release|Win32.Build.0 = Release|Win32
+		{29D16885-7228-4C31-81ED-5F9187C7F2A9}.Release|x64.ActiveCfg = Release|x64
+		{29D16885-7228-4C31-81ED-5F9187C7F2A9}.Release|x64.Build.0 = Release|x64
 		{17BCAFC0-5FDC-4C94-AEB9-95F3E220614B}.Debug|Win32.ActiveCfg = Debug|Win32
 		{17BCAFC0-5FDC-4C94-AEB9-95F3E220614B}.Debug|Win32.Build.0 = Debug|Win32
+		{17BCAFC0-5FDC-4C94-AEB9-95F3E220614B}.Debug|x64.ActiveCfg = Debug|x64
+		{17BCAFC0-5FDC-4C94-AEB9-95F3E220614B}.Debug|x64.Build.0 = Debug|x64
 		{17BCAFC0-5FDC-4C94-AEB9-95F3E220614B}.Release|Win32.ActiveCfg = Release|Win32
 		{17BCAFC0-5FDC-4C94-AEB9-95F3E220614B}.Release|Win32.Build.0 = Release|Win32
+		{17BCAFC0-5FDC-4C94-AEB9-95F3E220614B}.Release|x64.ActiveCfg = Release|x64
+		{17BCAFC0-5FDC-4C94-AEB9-95F3E220614B}.Release|x64.Build.0 = Release|x64
 		{0A7E7F92-FDEA-40F1-A9EC-3BA484F98BBF}.Debug|Win32.ActiveCfg = Debug|Win32
 		{0A7E7F92-FDEA-40F1-A9EC-3BA484F98BBF}.Debug|Win32.Build.0 = Debug|Win32
+		{0A7E7F92-FDEA-40F1-A9EC-3BA484F98BBF}.Debug|x64.ActiveCfg = Debug|x64
+		{0A7E7F92-FDEA-40F1-A9EC-3BA484F98BBF}.Debug|x64.Build.0 = Debug|x64
 		{0A7E7F92-FDEA-40F1-A9EC-3BA484F98BBF}.Release|Win32.ActiveCfg = Release|Win32
 		{0A7E7F92-FDEA-40F1-A9EC-3BA484F98BBF}.Release|Win32.Build.0 = Release|Win32
+		{0A7E7F92-FDEA-40F1-A9EC-3BA484F98BBF}.Release|x64.ActiveCfg = Release|x64
+		{0A7E7F92-FDEA-40F1-A9EC-3BA484F98BBF}.Release|x64.Build.0 = Release|x64
 		{46CEDFFF-9692-456A-AA24-38B5D6BCF4C5}.Debug|Win32.ActiveCfg = Debug|Win32
 		{46CEDFFF-9692-456A-AA24-38B5D6BCF4C5}.Debug|Win32.Build.0 = Debug|Win32
+		{46CEDFFF-9692-456A-AA24-38B5D6BCF4C5}.Debug|x64.ActiveCfg = Debug|x64
+		{46CEDFFF-9692-456A-AA24-38B5D6BCF4C5}.Debug|x64.Build.0 = Debug|x64
 		{46CEDFFF-9692-456A-AA24-38B5D6BCF4C5}.Release|Win32.ActiveCfg = Release|Win32
 		{46CEDFFF-9692-456A-AA24-38B5D6BCF4C5}.Release|Win32.Build.0 = Release|Win32
+		{46CEDFFF-9692-456A-AA24-38B5D6BCF4C5}.Release|x64.ActiveCfg = Release|x64
+		{46CEDFFF-9692-456A-AA24-38B5D6BCF4C5}.Release|x64.Build.0 = Release|x64
 		{C187A093-A0FE-489D-A40A-6E33DE0F9FEB}.Debug|Win32.ActiveCfg = Debug|Win32
 		{C187A093-A0FE-489D-A40A-6E33DE0F9FEB}.Debug|Win32.Build.0 = Debug|Win32
+		{C187A093-A0FE-489D-A40A-6E33DE0F9FEB}.Debug|x64.ActiveCfg = Debug|x64
+		{C187A093-A0FE-489D-A40A-6E33DE0F9FEB}.Debug|x64.Build.0 = Debug|x64
 		{C187A093-A0FE-489D-A40A-6E33DE0F9FEB}.Release|Win32.ActiveCfg = Release|Win32
 		{C187A093-A0FE-489D-A40A-6E33DE0F9FEB}.Release|Win32.Build.0 = Release|Win32
+		{C187A093-A0FE-489D-A40A-6E33DE0F9FEB}.Release|x64.ActiveCfg = Release|x64
+		{C187A093-A0FE-489D-A40A-6E33DE0F9FEB}.Release|x64.Build.0 = Release|x64
 		{D64C6D63-4458-4A88-AB38-35678384A7E4}.Debug|Win32.ActiveCfg = Debug|Win32
 		{D64C6D63-4458-4A88-AB38-35678384A7E4}.Debug|Win32.Build.0 = Debug|Win32
+		{D64C6D63-4458-4A88-AB38-35678384A7E4}.Debug|x64.ActiveCfg = Debug|x64
+		{D64C6D63-4458-4A88-AB38-35678384A7E4}.Debug|x64.Build.0 = Debug|x64
 		{D64C6D63-4458-4A88-AB38-35678384A7E4}.Release|Win32.ActiveCfg = Release|Win32
 		{D64C6D63-4458-4A88-AB38-35678384A7E4}.Release|Win32.Build.0 = Release|Win32
+		{D64C6D63-4458-4A88-AB38-35678384A7E4}.Release|x64.ActiveCfg = Release|x64
+		{D64C6D63-4458-4A88-AB38-35678384A7E4}.Release|x64.Build.0 = Release|x64
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
diff --git a/vsprojects/grpc_test_util_unsecure/grpc_test_util_unsecure.vcxproj b/vsprojects/grpc_test_util_unsecure/grpc_test_util_unsecure.vcxproj
index d429409..3521ef7 100644
--- a/vsprojects/grpc_test_util_unsecure/grpc_test_util_unsecure.vcxproj
+++ b/vsprojects/grpc_test_util_unsecure/grpc_test_util_unsecure.vcxproj
@@ -1,14 +1,22 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <Project DefaultTargets="Build" ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <ItemGroup Label="ProjectConfigurations">
     <ProjectConfiguration Include="Debug|Win32">
       <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>{0A7E7F92-FDEA-40F1-A9EC-3BA484F98BBF}</ProjectGuid>
@@ -28,12 +36,23 @@
     <UseDebugLibraries>true</UseDebugLibraries>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
+    <ConfigurationType>StaticLibrary</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
     <ConfigurationType>StaticLibrary</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
+    <ConfigurationType>StaticLibrary</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
   </ImportGroup>
@@ -41,17 +60,31 @@
     <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
     <Import Project="..\global.props" />
   </ImportGroup>
+  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="PropertySheets">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+    <Import Project="..\global.props" />
+  </ImportGroup>
   <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
     <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
     <Import Project="..\global.props" />
   </ImportGroup>
+  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="PropertySheets">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+    <Import Project="..\global.props" />
+  </ImportGroup>
   <PropertyGroup Label="UserMacros" />
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
     <TargetName>grpc_test_util_unsecure</TargetName>
   </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <TargetName>grpc_test_util_unsecure</TargetName>
+  </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
     <TargetName>grpc_test_util_unsecure</TargetName>
   </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <TargetName>grpc_test_util_unsecure</TargetName>
+  </PropertyGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
     <ClCompile>
       <PrecompiledHeader>NotUsing</PrecompiledHeader>
@@ -65,6 +98,19 @@
       <GenerateDebugInformation>true</GenerateDebugInformation>
     </Link>
   </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <ClCompile>
+      <PrecompiledHeader>NotUsing</PrecompiledHeader>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>Disabled</Optimization>
+      <PreprocessorDefinitions>WIN32;_DEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <SDLCheck>true</SDLCheck>
+    </ClCompile>
+    <Link>
+      <SubSystem>Windows</SubSystem>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+    </Link>
+  </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
     <ClCompile>
       <WarningLevel>Level3</WarningLevel>
@@ -82,6 +128,23 @@
       <OptimizeReferences>true</OptimizeReferences>
     </Link>
   </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <ClCompile>
+      <WarningLevel>Level3</WarningLevel>
+      <PrecompiledHeader>NotUsing</PrecompiledHeader>
+      <Optimization>MaxSpeed</Optimization>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <PreprocessorDefinitions>WIN32;NDEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <SDLCheck>true</SDLCheck>
+    </ClCompile>
+    <Link>
+      <SubSystem>Windows</SubSystem>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+    </Link>
+  </ItemDefinitionGroup>
   <ItemGroup>
     <ClCompile Include="..\..\test\core\end2end\cq_verifier.c">
     </ClCompile>
@@ -114,4 +177,4 @@
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ImportGroup Label="ExtensionTargets">
   </ImportGroup>
-</Project>
+</Project>
\ No newline at end of file