title: %(AdditionalIncludeDirectories) meaning
body: <p>Think this will be rather simple but somehow I could not find a reference saying about this.</p>
  
  <p>In the MSVC Include directories, there is an Additional Include Directories setting. The setting reads like this</p>
  
  <p>..\Project1; %(AdditionalIncludeDirectories)</p>
  
  <p>Understand the first part is the path for the program to search for additional program header includes. What about " %(AdditionalIncludeDirectories) " ? what does it mean?</p>
  
  <p>It does not seem to be a macro which I understand is headed by "$" eg $MACRO</p>
  
  <p>Thanks</p>