BURN #04: passing preprocessor variables into the build

A nice solution is explained here on stackoverflow:

it basically says that you should:

1st in the wixproj file add the following:

<Target Name="BeforeBuild">
    <CreateProperty Condition="$(BuildNumber) != ''"
Value="BuildNumber=$(BuildNumber);$(DefineConstants)">
      <Output TaskParameter="Value" PropertyName="DefineConstants" />
    </CreateProperty>
    <CreateProperty Condition="$(RevisionNumber) != ''"
Value="RevisionNumber =$(RevisionNumber);$(DefineConstants)">
      <Output TaskParameter="Value" PropertyName="DefineConstants" />
    </CreateProperty>
  </Target>

2nd in your msbuild task do this:

<MSBuild Projects="YourWixProject.wixproj" 
   Properties="BuildNumber=$(VerBuildNumber);RevisionNumber=$(RevisionNumber)" 
/>