diff --git a/.gitignore b/.gitignore
index 3e9e1b5..e8352ae 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,9 @@
 .sconsign.dblite
-run_tests
 *.o
+*.obj
+msvc/Release/
+msvc/Debug/
+*.suo
+*.opensdf
+*.sdf
+*.user
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new file mode 100644
index 0000000..992c6ba
--- /dev/null
+++ b/msvc/double-conversion.sln
@@ -0,0 +1,38 @@
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diff --git a/msvc/double-conversion.vcxproj b/msvc/double-conversion.vcxproj
new file mode 100644
index 0000000..8bbe4da
--- /dev/null
+++ b/msvc/double-conversion.vcxproj
@@ -0,0 +1,174 @@
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new file mode 100644
index 0000000..5e40159
--- /dev/null
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new file mode 100644
index 0000000..ef5ff2a
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new file mode 100644
index 0000000..8d49595
--- /dev/null
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+    <ClCompile Include="..\..\test\cctest\test-fast-dtoa.cc" />
+    <ClCompile Include="..\..\test\cctest\test-fixed-dtoa.cc" />
+    <ClCompile Include="..\..\test\cctest\test-ieee.cc" />
+    <ClCompile Include="..\..\test\cctest\test-strtod.cc" />
+  </ItemGroup>
+  <ItemGroup>
+    <ClInclude Include="..\..\test\cctest\cctest.h" />
+    <ClInclude Include="..\..\test\cctest\checks.h" />
+    <ClInclude Include="..\..\test\cctest\gay-fixed.h" />
+    <ClInclude Include="..\..\test\cctest\gay-precision.h" />
+    <ClInclude Include="..\..\test\cctest\gay-shortest-single.h" />
+    <ClInclude Include="..\..\test\cctest\gay-shortest.h" />
+  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\double-conversion.vcxproj">
+      <Project>{6863544a-0ce8-4ca9-a132-74116fd9d9bb}</Project>
+    </ProjectReference>
+  </ItemGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <ImportGroup Label="ExtensionTargets">
+  </ImportGroup>
+</Project>
\ No newline at end of file
diff --git a/msvc/run_tests/run_tests.vcxproj.filters b/msvc/run_tests/run_tests.vcxproj.filters
new file mode 100644
index 0000000..e923c7d
--- /dev/null
+++ b/msvc/run_tests/run_tests.vcxproj.filters
@@ -0,0 +1,81 @@
+﻿<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup>
+    <Filter Include="Source Files">
+      <UniqueIdentifier>{4FC737F1-C7A5-4376-A066-2A32D752A2FF}</UniqueIdentifier>
+      <Extensions>cpp;c;cc;cxx;def;odl;idl;hpj;bat;asm;asmx</Extensions>
+    </Filter>
+    <Filter Include="Header Files">
+      <UniqueIdentifier>{93995380-89BD-4b04-88EB-625FBE52EBFB}</UniqueIdentifier>
+      <Extensions>h;hh;hpp;hxx;hm;inl;inc;xsd</Extensions>
+    </Filter>
+    <Filter Include="Resource Files">
+      <UniqueIdentifier>{67DA6AB6-F800-4c08-8B7A-83BB121AAD01}</UniqueIdentifier>
+      <Extensions>rc;ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe;resx;tiff;tif;png;wav;mfcribbon-ms</Extensions>
+    </Filter>
+  </ItemGroup>
+  <ItemGroup>
+    <ClCompile Include="..\..\test\cctest\cctest.cc">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\test\cctest\gay-fixed.cc">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\test\cctest\gay-precision.cc">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\test\cctest\gay-shortest.cc">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\test\cctest\gay-shortest-single.cc">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\test\cctest\test-bignum.cc">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\test\cctest\test-bignum-dtoa.cc">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\test\cctest\test-conversions.cc">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\test\cctest\test-diy-fp.cc">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\test\cctest\test-dtoa.cc">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\test\cctest\test-fast-dtoa.cc">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\test\cctest\test-fixed-dtoa.cc">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\test\cctest\test-ieee.cc">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\test\cctest\test-strtod.cc">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+  </ItemGroup>
+  <ItemGroup>
+    <ClInclude Include="..\..\test\cctest\cctest.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="..\..\test\cctest\checks.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="..\..\test\cctest\gay-fixed.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="..\..\test\cctest\gay-precision.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="..\..\test\cctest\gay-shortest.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="..\..\test\cctest\gay-shortest-single.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+  </ItemGroup>
+</Project>
\ No newline at end of file
diff --git a/msvc/testrunner.cmd b/msvc/testrunner.cmd
new file mode 100644
index 0000000..f606158
--- /dev/null
+++ b/msvc/testrunner.cmd
@@ -0,0 +1,11 @@
+@echo off
+setlocal enabledelayedexpansion
+setlocal enableextensions
+
+for /f useback %%f in (`Release\x64\run_tests.exe --list`) do (
+	set var=%%f
+	if "x!var:~-1!" == "x<" (
+		set 	var=!var:~0,-1!
+	)
+	Release\x64\run_tests !var!
+)
diff --git a/src/double-conversion.cc b/src/double-conversion.cc
index b962b3b..d82150b 100644
--- a/src/double-conversion.cc
+++ b/src/double-conversion.cc
@@ -494,10 +494,17 @@
 // because it constant-propagated the radix and concluded that the last
 // condition was always true. By moving it into a separate function the
 // compiler wouldn't warn anymore.
+#if _MSC_VER
+#pragma optimize("",off)
 static bool IsDecimalDigitForRadix(int c, int radix) {
   return '0' <= c && c <= '9' && (c - '0') < radix;
 }
-
+#pragma optimize("",on)
+#else
+static bool inline IsDecimalDigitForRadix(int c, int radix) {
+	return '0' <= c && c <= '9' && (c - '0') < radix;
+}
+#endif
 // Returns true if 'c' is a character digit that is valid for the given radix.
 // The 'a_character' should be 'a' or 'A'.
 //