I&#39;m getting this error when building on windows.   Looking online it seems it can happen if you include windows.h before boost/asio.hpp without setting WIN32_LEAN_AND_MEAN.<br>I&#39;ve only got three places in my code that import windows.h on their own, and I prefixed them all with that macro, but I&#39;m still getting one error.  The only other thing I can think of is that <br>

one of the boost libraries is including it and that&#39;s throwing a wrench into things.  Unforunately it&#39;s proving particularly pernicious to determine all the files that include windows.h.  Does anyone<br>know which libraries include it or have experience getting rid of this error?<br>