title: Redefining or changing macro value
body: <p>I am currently working on an already developed project written in MFC C++ and am facing a problem with an already present macro having the definition:</p>
  
  <pre><code>#define HEIGHT_TESTS 13
  </code></pre>
  
  <p>I am trying to change the value from within the code but I think since its a preprocessed definition, I am unable to do that. Is there a way I could get around this problem without having to change the original macro overall (as it might affect the original functionality of the program). I am just intending to change it in one particular condition, rest everywhere else it remains the same.</p>
  
  <p>Just to let everyone know, I have obviously tried out using a different macro definition with the value (17) I am intending to use, but no luck as such.</p>
  
  <p>Any help would be much appreciated.</p>