Fix #13210. Port the Windows build from VS2008 to VS2010.
diff --git a/PCbuild/_multiprocessing.vcxproj.filters b/PCbuild/_multiprocessing.vcxproj.filters
new file mode 100644
index 0000000..78133ec
--- /dev/null
+++ b/PCbuild/_multiprocessing.vcxproj.filters
@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+ <ItemGroup>
+ <Filter Include="Header Files">
+ <UniqueIdentifier>{623c956c-1893-43d9-a7dc-96e4fef20f93}</UniqueIdentifier>
+ </Filter>
+ <Filter Include="Source Files">
+ <UniqueIdentifier>{34615a62-f999-4659-83f5-19d17a644530}</UniqueIdentifier>
+ </Filter>
+ </ItemGroup>
+ <ItemGroup>
+ <ClInclude Include="..\Modules\_multiprocessing\multiprocessing.h">
+ <Filter>Header Files</Filter>
+ </ClInclude>
+ </ItemGroup>
+ <ItemGroup>
+ <ClCompile Include="..\Modules\_multiprocessing\multiprocessing.c">
+ <Filter>Source Files</Filter>
+ </ClCompile>
+ <ClCompile Include="..\Modules\_multiprocessing\semaphore.c">
+ <Filter>Source Files</Filter>
+ </ClCompile>
+ </ItemGroup>
+</Project>
\ No newline at end of file