Issue #22869: Add pylifecycle.c/.h files to pythoncore project.
diff --git a/PCbuild/pythoncore.vcxproj.filters b/PCbuild/pythoncore.vcxproj.filters
index 8c65247..174140a 100644
--- a/PCbuild/pythoncore.vcxproj.filters
+++ b/PCbuild/pythoncore.vcxproj.filters
@@ -216,6 +216,9 @@
     <ClInclude Include="..\Include\pygetopt.h">
       <Filter>Include</Filter>
     </ClInclude>
+    <ClInclude Include="..\Include\pylifecycle.h">
+      <Filter>Include</Filter>
+    </ClInclude>
     <ClInclude Include="..\Include\pymath.h">
       <Filter>Include</Filter>
     </ClInclude>
@@ -890,6 +893,9 @@
     <ClCompile Include="..\Python\pyfpe.c">
       <Filter>Python</Filter>
     </ClCompile>
+    <ClCompile Include="..\Python\pylifecycle.c">
+      <Filter>Python</Filter>
+    </ClCompile>
     <ClCompile Include="..\Python\pymath.c">
       <Filter>Python</Filter>
     </ClCompile>