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deleted file mode 100644
index 68448a3..0000000
--- a/lib/lib.vcproj
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@@ -1,191 +0,0 @@
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-			<Tool
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-			<Tool
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-				OutputFile="$(OutDir)\lbfgs.lib"
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-			/>
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-			Filter="h;hpp;hxx;hm;inl;inc;xsd"
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-			<File
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-			<File
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-			Filter="rc;ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe;resx;tiff;tif;png;wav"
-			UniqueIdentifier="{67DA6AB6-F800-4c08-8B7A-83BB121AAD01}"
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diff --git a/lib/lib.vcxproj b/lib/lib.vcxproj
new file mode 100644
index 0000000..84b38c5
--- /dev/null
+++ b/lib/lib.vcxproj
@@ -0,0 +1,95 @@
+�ｻｿ<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
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+    <ProjectConfiguration Include="Release|Win32">
+      <Configuration>Release</Configuration>
+      <Platform>Win32</Platform>
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+  <PropertyGroup Label="Globals">
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+    <RootNamespace>lib</RootNamespace>
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+    <CodeAnalysisRuleAssemblies Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" />
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+    <TargetName Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">$(SolutionName)_debug</TargetName>
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+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
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+      <AdditionalIncludeDirectories>$(SolutionDir)include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
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+      <Optimization>MaxSpeed</Optimization>
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+      <PreprocessorDefinitions>WIN32;NDEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
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+      <PrecompiledHeader>
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+      <WarningLevel>Level3</WarningLevel>
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+    <ClCompile Include="lbfgs.c" />
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deleted file mode 100644
index a740e16..0000000
--- a/sample/sample.vcproj
+++ /dev/null
@@ -1,195 +0,0 @@
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-	TargetFrameworkVersion="196613"
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-				GenerateDebugInformation="true"
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new file mode 100644
index 0000000..083c269
--- /dev/null
+++ b/sample/sample.vcxproj
@@ -0,0 +1,105 @@
+�ｻｿ<?xml version="1.0" encoding="utf-8"?>
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+  <ItemGroup Label="ProjectConfigurations">
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+    <ProjectConfiguration Include="Release|Win32">
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+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+  </ItemGroup>
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>{B4D7D5F5-4A4E-49D5-B38A-E5673520DE66}</ProjectGuid>
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+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
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+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
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+    <CodeAnalysisRuleSet Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">AllRules.ruleset</CodeAnalysisRuleSet>
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+    <CodeAnalysisRuleAssemblies Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" />
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+    <CodeAnalysisRules Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" />
+    <CodeAnalysisRuleAssemblies Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" />
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+      <AdditionalIncludeDirectories>$(SolutionDir)include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
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+      <DebugInformationFormat>EditAndContinue</DebugInformationFormat>
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+    <Link>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
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+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <AdditionalIncludeDirectories>$(SolutionDir)include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>WIN32;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
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+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <PrecompiledHeader>
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+      <WarningLevel>Level3</WarningLevel>
+      <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
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+    <Link>
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+      <SubSystem>Console</SubSystem>
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+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
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+  </ItemDefinitionGroup>
+  <ItemGroup>
+    <ClCompile Include="sample.c" />
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+  <ItemGroup>
+    <ProjectReference Include="..\lib\lib.vcxproj">
+      <Project>{c4405b73-a899-44bf-8681-04ce040b6705}</Project>
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+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
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+</Project>
\ No newline at end of file