error WinSock.h has already been included Boost Windows Qt

Question

I am using boost lib on Qt creator to develop an application, my platform is Windows8 MSVC2013 64.

I have two class on each I am using boost headers,

Now I n

Answer 1

Move the #define WIN32_LEAN_AND_MEAN to g++ command line argument list as -DWIN32_LEAN_AND_MEAN. This helped me.
One more thing helped me is reordering #include directives to put boost includes before all others.