Bump version to 3.4.0 alpha 0.
diff --git a/PCbuild/pyproject.props b/PCbuild/pyproject.props
index 4afbe3c..fae0d99 100644
--- a/PCbuild/pyproject.props
+++ b/PCbuild/pyproject.props
@@ -13,7 +13,7 @@
     <IntDir>$(SolutionDir)$(PlatformName)-temp-$(Configuration)\$(ProjectName)\</IntDir>
   </PropertyGroup>
   <PropertyGroup Label="UserMacros">
-    <PyDllName>python33$(PyDebugExt)</PyDllName>
+    <PyDllName>python34$(PyDebugExt)</PyDllName>
     <PythonExe>$(OutDir)python$(PyDebugExt).exe</PythonExe>
     <KillPythonExe>$(OutDir)kill_python$(PyDebugExt).exe</KillPythonExe>
     <externalsDir>..\..</externalsDir>