Preprocess C++ to file

Preprocess.targets

<?xml version="1.0" encoding="utf-8"?>
<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
  <Target Name="Preprocess">
      <Message Condition="'$(Source)'!=''" Text="Preprocessing: $(Source)"/>
      <Error Condition="'$(Source)'==''" Text="To generate a pre-processed file, please specify a source file with msbuild /p:Source=nameOfTheSource.cpp"/>
      <CL PreprocessToFile="true" Sources="$(Source)"
          AdditionalIncludeDirectories="%(ClCompile.AdditionalIncludeDirectories)"
          PreprocessorDefinitions="%(ClCompile.PreprocessorDefinitions)"
          AdditionalOptions="%(ClCompile.AdditionalOptions) /d1PP"
          PreprocessKeepComments="true"
          PreprocessOutputPath="$(Source.Replace('.cpp', '.pp'))"
          />
  </Target>
</Project>