diff --git a/example/hash-map/hash-map-example.vcxproj b/example/hash-map/hash-map-example.vcxproj
index 7d536d1..9edd09e 100644
--- a/example/hash-map/hash-map-example.vcxproj
+++ b/example/hash-map/hash-map-example.vcxproj
@@ -199,11 +199,13 @@
   </PropertyGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
     <ClCompile>
-      <WarningLevel>Level3</WarningLevel>
+      <WarningLevel>EnableAllWarnings</WarningLevel>
       <SDLCheck>false</SDLCheck>
       <PreprocessorDefinitions>WIN32;_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>true</ConformanceMode>
       <AdditionalIncludeDirectories>$(SolutionDir)\libhashset\include</AdditionalIncludeDirectories>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DisableSpecificWarnings>4464;4710;4711;4820;5045</DisableSpecificWarnings>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
@@ -215,7 +217,7 @@
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Static|Win32'">
     <ClCompile>
-      <WarningLevel>Level4</WarningLevel>
+      <WarningLevel>EnableAllWarnings</WarningLevel>
       <FunctionLevelLinking>true</FunctionLevelLinking>
       <IntrinsicFunctions>true</IntrinsicFunctions>
       <SDLCheck>false</SDLCheck>
@@ -232,6 +234,8 @@
       <WholeProgramOptimization>true</WholeProgramOptimization>
       <AdditionalIncludeDirectories>$(SolutionDir)\libhashset\include</AdditionalIncludeDirectories>
       <FloatingPointModel>Fast</FloatingPointModel>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DisableSpecificWarnings>4464;4710;4711;4820;5045</DisableSpecificWarnings>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
@@ -246,7 +250,7 @@
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Shared|Win32'">
     <ClCompile>
-      <WarningLevel>Level4</WarningLevel>
+      <WarningLevel>EnableAllWarnings</WarningLevel>
       <FunctionLevelLinking>true</FunctionLevelLinking>
       <IntrinsicFunctions>true</IntrinsicFunctions>
       <SDLCheck>false</SDLCheck>
@@ -263,6 +267,8 @@
       <WholeProgramOptimization>true</WholeProgramOptimization>
       <AdditionalIncludeDirectories>$(SolutionDir)\libhashset\include</AdditionalIncludeDirectories>
       <FloatingPointModel>Fast</FloatingPointModel>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DisableSpecificWarnings>4464;4710;4711;4820;5045</DisableSpecificWarnings>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
@@ -283,11 +289,13 @@
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
     <ClCompile>
-      <WarningLevel>Level3</WarningLevel>
+      <WarningLevel>EnableAllWarnings</WarningLevel>
       <SDLCheck>false</SDLCheck>
       <PreprocessorDefinitions>_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>true</ConformanceMode>
       <AdditionalIncludeDirectories>$(SolutionDir)\libhashset\include</AdditionalIncludeDirectories>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DisableSpecificWarnings>4464;4710;4711;4820;5045</DisableSpecificWarnings>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
@@ -298,11 +306,13 @@
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|ARM64'">
     <ClCompile>
-      <WarningLevel>Level3</WarningLevel>
+      <WarningLevel>EnableAllWarnings</WarningLevel>
       <SDLCheck>false</SDLCheck>
       <PreprocessorDefinitions>_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>true</ConformanceMode>
       <AdditionalIncludeDirectories>$(SolutionDir)\libhashset\include</AdditionalIncludeDirectories>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DisableSpecificWarnings>4464;4710;4711;4820;5045</DisableSpecificWarnings>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
@@ -312,7 +322,7 @@
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   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Static|x64'">
     <ClCompile>
-      <WarningLevel>Level4</WarningLevel>
+      <WarningLevel>EnableAllWarnings</WarningLevel>
       <FunctionLevelLinking>true</FunctionLevelLinking>
       <IntrinsicFunctions>true</IntrinsicFunctions>
       <SDLCheck>false</SDLCheck>
@@ -328,6 +338,8 @@
       <WholeProgramOptimization>true</WholeProgramOptimization>
       <AdditionalIncludeDirectories>$(SolutionDir)\libhashset\include</AdditionalIncludeDirectories>
       <FloatingPointModel>Fast</FloatingPointModel>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DisableSpecificWarnings>4464;4710;4711;4820;5045</DisableSpecificWarnings>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
@@ -341,7 +353,7 @@
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   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Static|ARM64'">
     <ClCompile>
-      <WarningLevel>Level4</WarningLevel>
+      <WarningLevel>EnableAllWarnings</WarningLevel>
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       <IntrinsicFunctions>true</IntrinsicFunctions>
       <SDLCheck>false</SDLCheck>
@@ -357,6 +369,8 @@
       <WholeProgramOptimization>true</WholeProgramOptimization>
       <AdditionalIncludeDirectories>$(SolutionDir)\libhashset\include</AdditionalIncludeDirectories>
       <FloatingPointModel>Fast</FloatingPointModel>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DisableSpecificWarnings>4464;4710;4711;4820;5045</DisableSpecificWarnings>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
@@ -369,7 +383,7 @@
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   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Shared|x64'">
     <ClCompile>
-      <WarningLevel>Level4</WarningLevel>
+      <WarningLevel>EnableAllWarnings</WarningLevel>
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       <IntrinsicFunctions>true</IntrinsicFunctions>
       <SDLCheck>false</SDLCheck>
@@ -385,6 +399,8 @@
       <WholeProgramOptimization>true</WholeProgramOptimization>
       <AdditionalIncludeDirectories>$(SolutionDir)\libhashset\include</AdditionalIncludeDirectories>
       <FloatingPointModel>Fast</FloatingPointModel>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DisableSpecificWarnings>4464;4710;4711;4820;5045</DisableSpecificWarnings>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
@@ -404,7 +420,7 @@
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   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Shared|ARM64'">
     <ClCompile>
-      <WarningLevel>Level4</WarningLevel>
+      <WarningLevel>EnableAllWarnings</WarningLevel>
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       <IntrinsicFunctions>true</IntrinsicFunctions>
       <SDLCheck>false</SDLCheck>
@@ -420,6 +436,8 @@
       <WholeProgramOptimization>true</WholeProgramOptimization>
       <AdditionalIncludeDirectories>$(SolutionDir)\libhashset\include</AdditionalIncludeDirectories>
       <FloatingPointModel>Fast</FloatingPointModel>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DisableSpecificWarnings>4464;4710;4711;4820;5045</DisableSpecificWarnings>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
diff --git a/example/hash-set/hash-set-example.vcxproj b/example/hash-set/hash-set-example.vcxproj
index 497a4fb..eae3432 100644
--- a/example/hash-set/hash-set-example.vcxproj
+++ b/example/hash-set/hash-set-example.vcxproj
@@ -199,11 +199,13 @@
   </PropertyGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
     <ClCompile>
-      <WarningLevel>Level3</WarningLevel>
+      <WarningLevel>EnableAllWarnings</WarningLevel>
       <SDLCheck>false</SDLCheck>
       <PreprocessorDefinitions>WIN32;_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>true</ConformanceMode>
       <AdditionalIncludeDirectories>$(SolutionDir)\libhashset\include</AdditionalIncludeDirectories>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DisableSpecificWarnings>4464;4710;4711;4820;5045</DisableSpecificWarnings>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
@@ -215,7 +217,7 @@
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   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Static|Win32'">
     <ClCompile>
-      <WarningLevel>Level4</WarningLevel>
+      <WarningLevel>EnableAllWarnings</WarningLevel>
       <FunctionLevelLinking>true</FunctionLevelLinking>
       <IntrinsicFunctions>true</IntrinsicFunctions>
       <SDLCheck>false</SDLCheck>
@@ -232,6 +234,8 @@
       <WholeProgramOptimization>true</WholeProgramOptimization>
       <AdditionalIncludeDirectories>$(SolutionDir)\libhashset\include</AdditionalIncludeDirectories>
       <FloatingPointModel>Fast</FloatingPointModel>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DisableSpecificWarnings>4464;4710;4711;4820;5045</DisableSpecificWarnings>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
@@ -246,7 +250,7 @@
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   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Shared|Win32'">
     <ClCompile>
-      <WarningLevel>Level4</WarningLevel>
+      <WarningLevel>EnableAllWarnings</WarningLevel>
       <FunctionLevelLinking>true</FunctionLevelLinking>
       <IntrinsicFunctions>true</IntrinsicFunctions>
       <SDLCheck>false</SDLCheck>
@@ -263,6 +267,8 @@
       <WholeProgramOptimization>true</WholeProgramOptimization>
       <AdditionalIncludeDirectories>$(SolutionDir)\libhashset\include</AdditionalIncludeDirectories>
       <FloatingPointModel>Fast</FloatingPointModel>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DisableSpecificWarnings>4464;4710;4711;4820;5045</DisableSpecificWarnings>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
@@ -283,11 +289,13 @@
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   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
     <ClCompile>
-      <WarningLevel>Level3</WarningLevel>
+      <WarningLevel>EnableAllWarnings</WarningLevel>
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       <PreprocessorDefinitions>_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>true</ConformanceMode>
       <AdditionalIncludeDirectories>$(SolutionDir)\libhashset\include</AdditionalIncludeDirectories>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DisableSpecificWarnings>4464;4710;4711;4820;5045</DisableSpecificWarnings>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
@@ -298,11 +306,13 @@
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   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|ARM64'">
     <ClCompile>
-      <WarningLevel>Level3</WarningLevel>
+      <WarningLevel>EnableAllWarnings</WarningLevel>
       <SDLCheck>false</SDLCheck>
       <PreprocessorDefinitions>_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>true</ConformanceMode>
       <AdditionalIncludeDirectories>$(SolutionDir)\libhashset\include</AdditionalIncludeDirectories>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DisableSpecificWarnings>4464;4710;4711;4820;5045</DisableSpecificWarnings>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
@@ -312,7 +322,7 @@
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   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Static|x64'">
     <ClCompile>
-      <WarningLevel>Level4</WarningLevel>
+      <WarningLevel>EnableAllWarnings</WarningLevel>
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       <IntrinsicFunctions>true</IntrinsicFunctions>
       <SDLCheck>false</SDLCheck>
@@ -328,6 +338,8 @@
       <WholeProgramOptimization>true</WholeProgramOptimization>
       <AdditionalIncludeDirectories>$(SolutionDir)\libhashset\include</AdditionalIncludeDirectories>
       <FloatingPointModel>Fast</FloatingPointModel>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DisableSpecificWarnings>4464;4710;4711;4820;5045</DisableSpecificWarnings>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
@@ -341,7 +353,7 @@
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   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Static|ARM64'">
     <ClCompile>
-      <WarningLevel>Level4</WarningLevel>
+      <WarningLevel>EnableAllWarnings</WarningLevel>
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       <IntrinsicFunctions>true</IntrinsicFunctions>
       <SDLCheck>false</SDLCheck>
@@ -357,6 +369,8 @@
       <WholeProgramOptimization>true</WholeProgramOptimization>
       <AdditionalIncludeDirectories>$(SolutionDir)\libhashset\include</AdditionalIncludeDirectories>
       <FloatingPointModel>Fast</FloatingPointModel>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DisableSpecificWarnings>4464;4710;4711;4820;5045</DisableSpecificWarnings>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
@@ -369,7 +383,7 @@
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   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Shared|x64'">
     <ClCompile>
-      <WarningLevel>Level4</WarningLevel>
+      <WarningLevel>EnableAllWarnings</WarningLevel>
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       <IntrinsicFunctions>true</IntrinsicFunctions>
       <SDLCheck>false</SDLCheck>
@@ -385,6 +399,8 @@
       <WholeProgramOptimization>true</WholeProgramOptimization>
       <AdditionalIncludeDirectories>$(SolutionDir)\libhashset\include</AdditionalIncludeDirectories>
       <FloatingPointModel>Fast</FloatingPointModel>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DisableSpecificWarnings>4464;4710;4711;4820;5045</DisableSpecificWarnings>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
@@ -404,7 +420,7 @@
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   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Shared|ARM64'">
     <ClCompile>
-      <WarningLevel>Level4</WarningLevel>
+      <WarningLevel>EnableAllWarnings</WarningLevel>
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       <IntrinsicFunctions>true</IntrinsicFunctions>
       <SDLCheck>false</SDLCheck>
@@ -420,6 +436,8 @@
       <WholeProgramOptimization>true</WholeProgramOptimization>
       <AdditionalIncludeDirectories>$(SolutionDir)\libhashset\include</AdditionalIncludeDirectories>
       <FloatingPointModel>Fast</FloatingPointModel>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DisableSpecificWarnings>4464;4710;4711;4820;5045</DisableSpecificWarnings>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
diff --git a/libhashset/libhashset.vcxproj b/libhashset/libhashset.vcxproj
index f49a5c4..9bdec49 100644
--- a/libhashset/libhashset.vcxproj
+++ b/libhashset/libhashset.vcxproj
@@ -212,12 +212,14 @@
   </PropertyGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
     <ClCompile>
-      <WarningLevel>Level3</WarningLevel>
+      <WarningLevel>EnableAllWarnings</WarningLevel>
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       <PreprocessorDefinitions>WIN32;_DEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>true</ConformanceMode>
       <PrecompiledHeader>NotUsing</PrecompiledHeader>
       <AdditionalIncludeDirectories>$(ProjectDir)\include</AdditionalIncludeDirectories>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DisableSpecificWarnings>4464;4710;4711;4820;5045</DisableSpecificWarnings>
     </ClCompile>
     <Link>
       <SubSystem>
@@ -227,7 +229,7 @@
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Static|Win32'">
     <ClCompile>
-      <WarningLevel>Level3</WarningLevel>
+      <WarningLevel>EnableAllWarnings</WarningLevel>
       <FunctionLevelLinking>true</FunctionLevelLinking>
       <IntrinsicFunctions>true</IntrinsicFunctions>
       <SDLCheck>false</SDLCheck>
@@ -245,6 +247,8 @@
       <EnableEnhancedInstructionSet>StreamingSIMDExtensions</EnableEnhancedInstructionSet>
       <AdditionalIncludeDirectories>$(ProjectDir)\include</AdditionalIncludeDirectories>
       <FloatingPointModel>Fast</FloatingPointModel>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DisableSpecificWarnings>4464;4710;4711;4820;5045</DisableSpecificWarnings>
     </ClCompile>
     <Link>
       <SubSystem>
@@ -259,7 +263,7 @@
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Shared|Win32'">
     <ClCompile>
-      <WarningLevel>Level3</WarningLevel>
+      <WarningLevel>EnableAllWarnings</WarningLevel>
       <FunctionLevelLinking>true</FunctionLevelLinking>
       <IntrinsicFunctions>true</IntrinsicFunctions>
       <SDLCheck>false</SDLCheck>
@@ -277,6 +281,8 @@
       <AdditionalIncludeDirectories>$(ProjectDir)\include</AdditionalIncludeDirectories>
       <PreprocessorDefinitions>WIN32;NDEBUG;_DLL;HASHSET_DLL;_HASHSET_EXPORTS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <FloatingPointModel>Fast</FloatingPointModel>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DisableSpecificWarnings>4464;4710;4711;4820;5045</DisableSpecificWarnings>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
@@ -292,12 +298,14 @@
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
     <ClCompile>
-      <WarningLevel>Level3</WarningLevel>
+      <WarningLevel>EnableAllWarnings</WarningLevel>
       <SDLCheck>false</SDLCheck>
       <PreprocessorDefinitions>_DEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>true</ConformanceMode>
       <PrecompiledHeader>NotUsing</PrecompiledHeader>
       <AdditionalIncludeDirectories>$(ProjectDir)\include</AdditionalIncludeDirectories>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DisableSpecificWarnings>4464;4710;4711;4820;5045</DisableSpecificWarnings>
     </ClCompile>
     <Link>
       <SubSystem>
@@ -307,12 +315,14 @@
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|ARM64'">
     <ClCompile>
-      <WarningLevel>Level3</WarningLevel>
+      <WarningLevel>EnableAllWarnings</WarningLevel>
       <SDLCheck>false</SDLCheck>
       <PreprocessorDefinitions>_DEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>true</ConformanceMode>
       <PrecompiledHeader>NotUsing</PrecompiledHeader>
       <AdditionalIncludeDirectories>$(ProjectDir)\include</AdditionalIncludeDirectories>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DisableSpecificWarnings>4464;4710;4711;4820;5045</DisableSpecificWarnings>
     </ClCompile>
     <Link>
       <SubSystem>
@@ -322,7 +332,7 @@
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Static|x64'">
     <ClCompile>
-      <WarningLevel>Level3</WarningLevel>
+      <WarningLevel>EnableAllWarnings</WarningLevel>
       <FunctionLevelLinking>true</FunctionLevelLinking>
       <IntrinsicFunctions>true</IntrinsicFunctions>
       <SDLCheck>false</SDLCheck>
@@ -339,6 +349,8 @@
       <ControlFlowGuard>false</ControlFlowGuard>
       <AdditionalIncludeDirectories>$(ProjectDir)\include</AdditionalIncludeDirectories>
       <FloatingPointModel>Fast</FloatingPointModel>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DisableSpecificWarnings>4464;4710;4711;4820;5045</DisableSpecificWarnings>
     </ClCompile>
     <Link>
       <SubSystem>
@@ -353,7 +365,7 @@
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Static|ARM64'">
     <ClCompile>
-      <WarningLevel>Level3</WarningLevel>
+      <WarningLevel>EnableAllWarnings</WarningLevel>
       <FunctionLevelLinking>true</FunctionLevelLinking>
       <IntrinsicFunctions>true</IntrinsicFunctions>
       <SDLCheck>false</SDLCheck>
@@ -370,6 +382,8 @@
       <ControlFlowGuard>false</ControlFlowGuard>
       <AdditionalIncludeDirectories>$(ProjectDir)\include</AdditionalIncludeDirectories>
       <FloatingPointModel>Fast</FloatingPointModel>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DisableSpecificWarnings>4464;4710;4711;4820;5045</DisableSpecificWarnings>
     </ClCompile>
     <Link>
       <SubSystem>
@@ -384,7 +398,7 @@
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   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Shared|x64'">
     <ClCompile>
-      <WarningLevel>Level3</WarningLevel>
+      <WarningLevel>EnableAllWarnings</WarningLevel>
       <FunctionLevelLinking>true</FunctionLevelLinking>
       <IntrinsicFunctions>true</IntrinsicFunctions>
       <SDLCheck>false</SDLCheck>
@@ -401,6 +415,8 @@
       <ControlFlowGuard>false</ControlFlowGuard>
       <AdditionalIncludeDirectories>$(ProjectDir)\include</AdditionalIncludeDirectories>
       <FloatingPointModel>Fast</FloatingPointModel>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DisableSpecificWarnings>4464;4710;4711;4820;5045</DisableSpecificWarnings>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
@@ -416,7 +432,7 @@
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Shared|ARM64'">
     <ClCompile>
-      <WarningLevel>Level3</WarningLevel>
+      <WarningLevel>EnableAllWarnings</WarningLevel>
       <FunctionLevelLinking>true</FunctionLevelLinking>
       <IntrinsicFunctions>true</IntrinsicFunctions>
       <SDLCheck>false</SDLCheck>
@@ -433,6 +449,8 @@
       <ControlFlowGuard>false</ControlFlowGuard>
       <AdditionalIncludeDirectories>$(ProjectDir)\include</AdditionalIncludeDirectories>
       <FloatingPointModel>Fast</FloatingPointModel>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DisableSpecificWarnings>4464;4710;4711;4820;5045</DisableSpecificWarnings>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
diff --git a/libhashset/src/dll_main.c b/libhashset/src/dll_main.c
index b6644c5..1998fdb 100644
--- a/libhashset/src/dll_main.c
+++ b/libhashset/src/dll_main.c
@@ -3,8 +3,10 @@
 /* This work has been released under the CC0 1.0 Universal license!           */
 /******************************************************************************/
 
-#ifdef __GNUC__
+#if defined(__GNUC__)
 #  pragma GCC diagnostic ignored "-Wpedantic"
+#elif defined(_MSC_VER)
+#  pragma warning(disable: 4100)
 #endif
 
 #if defined(_WIN32)
@@ -25,4 +27,4 @@ BOOL APIENTRY DllMain(HMODULE hModule, DWORD ul_reason_for_call, LPVOID lpReserv
 	return TRUE;
 }
 
-#endif
+#endif /*_WIN32*/
diff --git a/test/hash-map/test-hash-map.vcxproj b/test/hash-map/test-hash-map.vcxproj
index d947395..d524ef2 100644
--- a/test/hash-map/test-hash-map.vcxproj
+++ b/test/hash-map/test-hash-map.vcxproj
@@ -203,11 +203,13 @@
   </PropertyGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
     <ClCompile>
-      <WarningLevel>Level3</WarningLevel>
+      <WarningLevel>EnableAllWarnings</WarningLevel>
       <SDLCheck>false</SDLCheck>
       <PreprocessorDefinitions>WIN32;_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>true</ConformanceMode>
       <AdditionalIncludeDirectories>$(SolutionDir)libhashset\include;$(ProjectDir)..\shared\include</AdditionalIncludeDirectories>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DisableSpecificWarnings>4464;4710;4711;4820;5045</DisableSpecificWarnings>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
@@ -219,7 +221,7 @@
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Static|Win32'">
     <ClCompile>
-      <WarningLevel>Level4</WarningLevel>
+      <WarningLevel>EnableAllWarnings</WarningLevel>
       <FunctionLevelLinking>true</FunctionLevelLinking>
       <IntrinsicFunctions>true</IntrinsicFunctions>
       <SDLCheck>false</SDLCheck>
@@ -236,6 +238,8 @@
       <WholeProgramOptimization>true</WholeProgramOptimization>
       <AdditionalIncludeDirectories>$(SolutionDir)libhashset\include;$(ProjectDir)..\shared\include</AdditionalIncludeDirectories>
       <FloatingPointModel>Fast</FloatingPointModel>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DisableSpecificWarnings>4464;4710;4711;4820;5045</DisableSpecificWarnings>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
@@ -252,7 +256,7 @@
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Shared|Win32'">
     <ClCompile>
-      <WarningLevel>Level4</WarningLevel>
+      <WarningLevel>EnableAllWarnings</WarningLevel>
       <FunctionLevelLinking>true</FunctionLevelLinking>
       <IntrinsicFunctions>true</IntrinsicFunctions>
       <SDLCheck>false</SDLCheck>
@@ -269,6 +273,8 @@
       <WholeProgramOptimization>true</WholeProgramOptimization>
       <AdditionalIncludeDirectories>$(SolutionDir)libhashset\include;$(ProjectDir)..\shared\include</AdditionalIncludeDirectories>
       <FloatingPointModel>Fast</FloatingPointModel>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DisableSpecificWarnings>4464;4710;4711;4820;5045</DisableSpecificWarnings>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
@@ -291,11 +297,13 @@
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
     <ClCompile>
-      <WarningLevel>Level3</WarningLevel>
+      <WarningLevel>EnableAllWarnings</WarningLevel>
       <SDLCheck>false</SDLCheck>
       <PreprocessorDefinitions>_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>true</ConformanceMode>
       <AdditionalIncludeDirectories>$(SolutionDir)libhashset\include;$(ProjectDir)..\shared\include</AdditionalIncludeDirectories>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DisableSpecificWarnings>4464;4710;4711;4820;5045</DisableSpecificWarnings>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
@@ -306,11 +314,13 @@
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   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|ARM64'">
     <ClCompile>
-      <WarningLevel>Level3</WarningLevel>
+      <WarningLevel>EnableAllWarnings</WarningLevel>
       <SDLCheck>false</SDLCheck>
       <PreprocessorDefinitions>_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>true</ConformanceMode>
       <AdditionalIncludeDirectories>$(SolutionDir)libhashset\include;$(ProjectDir)..\shared\include</AdditionalIncludeDirectories>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DisableSpecificWarnings>4464;4710;4711;4820;5045</DisableSpecificWarnings>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
@@ -320,7 +330,7 @@
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   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Static|x64'">
     <ClCompile>
-      <WarningLevel>Level4</WarningLevel>
+      <WarningLevel>EnableAllWarnings</WarningLevel>
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       <IntrinsicFunctions>true</IntrinsicFunctions>
       <SDLCheck>false</SDLCheck>
@@ -336,6 +346,8 @@
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       <AdditionalIncludeDirectories>$(SolutionDir)libhashset\include;$(ProjectDir)..\shared\include</AdditionalIncludeDirectories>
       <FloatingPointModel>Fast</FloatingPointModel>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DisableSpecificWarnings>4464;4710;4711;4820;5045</DisableSpecificWarnings>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
@@ -351,7 +363,7 @@
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   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Static|ARM64'">
     <ClCompile>
-      <WarningLevel>Level4</WarningLevel>
+      <WarningLevel>EnableAllWarnings</WarningLevel>
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       <IntrinsicFunctions>true</IntrinsicFunctions>
       <SDLCheck>false</SDLCheck>
@@ -367,6 +379,8 @@
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       <AdditionalIncludeDirectories>$(SolutionDir)libhashset\include;$(ProjectDir)..\shared\include</AdditionalIncludeDirectories>
       <FloatingPointModel>Fast</FloatingPointModel>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DisableSpecificWarnings>4464;4710;4711;4820;5045</DisableSpecificWarnings>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
@@ -381,7 +395,7 @@
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   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Shared|x64'">
     <ClCompile>
-      <WarningLevel>Level4</WarningLevel>
+      <WarningLevel>EnableAllWarnings</WarningLevel>
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       <IntrinsicFunctions>true</IntrinsicFunctions>
       <SDLCheck>false</SDLCheck>
@@ -397,6 +411,8 @@
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       <AdditionalIncludeDirectories>$(SolutionDir)libhashset\include;$(ProjectDir)..\shared\include</AdditionalIncludeDirectories>
       <FloatingPointModel>Fast</FloatingPointModel>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DisableSpecificWarnings>4464;4710;4711;4820;5045</DisableSpecificWarnings>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
@@ -418,7 +434,7 @@
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   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Shared|ARM64'">
     <ClCompile>
-      <WarningLevel>Level4</WarningLevel>
+      <WarningLevel>EnableAllWarnings</WarningLevel>
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       <IntrinsicFunctions>true</IntrinsicFunctions>
       <SDLCheck>false</SDLCheck>
@@ -434,6 +450,8 @@
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       <AdditionalIncludeDirectories>$(SolutionDir)libhashset\include;$(ProjectDir)..\shared\include</AdditionalIncludeDirectories>
       <FloatingPointModel>Fast</FloatingPointModel>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DisableSpecificWarnings>4464;4710;4711;4820;5045</DisableSpecificWarnings>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
diff --git a/test/hash-set/test-hash-set.vcxproj b/test/hash-set/test-hash-set.vcxproj
index e641a8e..9b762b6 100644
--- a/test/hash-set/test-hash-set.vcxproj
+++ b/test/hash-set/test-hash-set.vcxproj
@@ -203,11 +203,13 @@
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   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
     <ClCompile>
-      <WarningLevel>Level3</WarningLevel>
+      <WarningLevel>EnableAllWarnings</WarningLevel>
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       <PreprocessorDefinitions>WIN32;_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>true</ConformanceMode>
       <AdditionalIncludeDirectories>$(SolutionDir)libhashset\include;$(ProjectDir)..\shared\include</AdditionalIncludeDirectories>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DisableSpecificWarnings>4464;4710;4711;4820;5045</DisableSpecificWarnings>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
@@ -219,7 +221,7 @@
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   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Static|Win32'">
     <ClCompile>
-      <WarningLevel>Level4</WarningLevel>
+      <WarningLevel>EnableAllWarnings</WarningLevel>
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       <IntrinsicFunctions>true</IntrinsicFunctions>
       <SDLCheck>false</SDLCheck>
@@ -236,6 +238,8 @@
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       <AdditionalIncludeDirectories>$(SolutionDir)libhashset\include;$(ProjectDir)..\shared\include</AdditionalIncludeDirectories>
       <FloatingPointModel>Fast</FloatingPointModel>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DisableSpecificWarnings>4464;4710;4711;4820;5045</DisableSpecificWarnings>
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     <Link>
       <SubSystem>Console</SubSystem>
@@ -252,7 +256,7 @@
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   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Shared|Win32'">
     <ClCompile>
-      <WarningLevel>Level4</WarningLevel>
+      <WarningLevel>EnableAllWarnings</WarningLevel>
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       <IntrinsicFunctions>true</IntrinsicFunctions>
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@@ -269,6 +273,8 @@
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       <AdditionalIncludeDirectories>$(SolutionDir)libhashset\include;$(ProjectDir)..\shared\include</AdditionalIncludeDirectories>
       <FloatingPointModel>Fast</FloatingPointModel>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DisableSpecificWarnings>4464;4710;4711;4820;5045</DisableSpecificWarnings>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
@@ -291,11 +297,13 @@
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   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
     <ClCompile>
-      <WarningLevel>Level3</WarningLevel>
+      <WarningLevel>EnableAllWarnings</WarningLevel>
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       <PreprocessorDefinitions>_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>true</ConformanceMode>
       <AdditionalIncludeDirectories>$(SolutionDir)libhashset\include;$(ProjectDir)..\shared\include</AdditionalIncludeDirectories>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DisableSpecificWarnings>4464;4710;4711;4820;5045</DisableSpecificWarnings>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
@@ -306,11 +314,13 @@
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   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|ARM64'">
     <ClCompile>
-      <WarningLevel>Level3</WarningLevel>
+      <WarningLevel>EnableAllWarnings</WarningLevel>
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       <PreprocessorDefinitions>_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>true</ConformanceMode>
       <AdditionalIncludeDirectories>$(SolutionDir)libhashset\include;$(ProjectDir)..\shared\include</AdditionalIncludeDirectories>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DisableSpecificWarnings>4464;4710;4711;4820;5045</DisableSpecificWarnings>
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     <Link>
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@@ -320,7 +330,7 @@
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   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Static|x64'">
     <ClCompile>
-      <WarningLevel>Level4</WarningLevel>
+      <WarningLevel>EnableAllWarnings</WarningLevel>
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       <IntrinsicFunctions>true</IntrinsicFunctions>
       <SDLCheck>false</SDLCheck>
@@ -336,6 +346,8 @@
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       <AdditionalIncludeDirectories>$(SolutionDir)libhashset\include;$(ProjectDir)..\shared\include</AdditionalIncludeDirectories>
       <FloatingPointModel>Fast</FloatingPointModel>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DisableSpecificWarnings>4464;4710;4711;4820;5045</DisableSpecificWarnings>
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     <Link>
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@@ -351,7 +363,7 @@
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   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Static|ARM64'">
     <ClCompile>
-      <WarningLevel>Level4</WarningLevel>
+      <WarningLevel>EnableAllWarnings</WarningLevel>
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@@ -367,6 +379,8 @@
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       <AdditionalIncludeDirectories>$(SolutionDir)libhashset\include;$(ProjectDir)..\shared\include</AdditionalIncludeDirectories>
       <FloatingPointModel>Fast</FloatingPointModel>
+      <TreatWarningAsError>true</TreatWarningAsError>
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@@ -381,7 +395,7 @@
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   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Shared|x64'">
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@@ -397,6 +411,8 @@
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       <AdditionalIncludeDirectories>$(SolutionDir)libhashset\include;$(ProjectDir)..\shared\include</AdditionalIncludeDirectories>
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@@ -434,6 +450,8 @@
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       <AdditionalIncludeDirectories>$(SolutionDir)libhashset\include;$(ProjectDir)..\shared\include</AdditionalIncludeDirectories>
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