That didn't work, shotgun it into the props files.

src/conio/conio.vcxproj

@@ -77,7 +77,6 @@
     <ResourceCompile>
       <PreprocessorDefinitions>NDEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <Culture>0x0409</Culture>
-      <NoWin32Manifest>True</NoWin32Manifest>
     </ResourceCompile>
     <Lib>
       <OutputFile>.\msvc.win32.release\conio.lib</OutputFile>
@@ -111,7 +110,6 @@
     <Lib>
       <OutputFile>.\msvc.win32.debug\conio.lib</OutputFile>
       <SuppressStartupBanner>true</SuppressStartupBanner>
-      <NoWin32Manifest>True</NoWin32Manifest>
     </Lib>
     <Bscmake>
       <SuppressStartupBanner>true</SuppressStartupBanner>

src/conio/conio_gdi.props

@@ -9,7 +9,11 @@
     <ClCompile>
       <PreprocessorDefinitions>WITH_GDI;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <AdditionalIncludeDirectories>$(MSBuildThisFileDirectory);%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <NoWin32Manifest>True</NoWin32Manifest>
     </ClCompile>
+    <ResourceCompile>
+      <NoWin32Manifest>True</NoWin32Manifest>
+    </ResourceCompile>
     <Link>
       <AdditionalDependencies>winmm.lib;%(AdditionalDependencies)</AdditionalDependencies>
       <SubSystem>Windows</SubSystem>

src/conio/conio_gdi.vcxproj

@@ -78,7 +78,6 @@
     <ResourceCompile>
       <PreprocessorDefinitions>NDEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <Culture>0x0409</Culture>
-      <NoWin32Manifest>True</NoWin32Manifest>
     </ResourceCompile>
     <Lib>
       <OutputFile>.\msvc.win32.gdi.release\conio_gdi.lib</OutputFile>
@@ -109,7 +108,6 @@
     <ResourceCompile>
       <PreprocessorDefinitions>_DEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <Culture>0x0409</Culture>
-      <NoWin32Manifest>True</NoWin32Manifest>
     </ResourceCompile>
     <Lib>
       <OutputFile>.\msvc.win32.gdi.debug\conio_gdi.lib</OutputFile>

src/conio/conio_sdl.vcxproj

@@ -78,7 +78,6 @@
     <ResourceCompile>
       <PreprocessorDefinitions>NDEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <Culture>0x0409</Culture>
-      <NoWin32Manifest>True</NoWin32Manifest>
     </ResourceCompile>
     <Lib>
       <OutputFile>.\msvc.win32.sdl.release\conio_sdl.lib</OutputFile>
@@ -113,7 +112,6 @@
     <Lib>
       <OutputFile>.\msvc.win32.sdl.debug\conio_sdl.lib</OutputFile>
       <SuppressStartupBanner>true</SuppressStartupBanner>
-      <NoWin32Manifest>True</NoWin32Manifest>
     </Lib>
     <Bscmake>
       <SuppressStartupBanner>true</SuppressStartupBanner>