title: How to highlight #ifdef <code/> #endif in emacs?
body: <p>I don't know if cc-mode or cedet is providing something alike that but that must not be such hard to realize I hope.</p>
  
  <p>What I want is to change background for code in C++ / C# source files between #ifdef (something) and #endif. Is there mode option for make it or where from to start?</p>