Cleanup.

Examples/MyProg/MyProg.vcxproj

@@ -139,7 +139,7 @@
       <SubSystem>Windows</SubSystem>
     </Link>
     <ResourceCompile>
-      <PreprocessorDefinitions>WIN32</PreprocessorDefinitions>
+      <PreprocessorDefinitions>WIN32;%(PreprocessorDefinitions)</PreprocessorDefinitions>
     </ResourceCompile>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|ARM64'">
@@ -205,7 +205,7 @@
       <EnableCOMDATFolding>true</EnableCOMDATFolding>
     </Link>
     <ResourceCompile>
-      <PreprocessorDefinitions>WIN32</PreprocessorDefinitions>
+      <PreprocessorDefinitions>WIN32;%(PreprocessorDefinitions)</PreprocessorDefinitions>
     </ResourceCompile>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|ARM64'">