text: #ifndef __LIBTRANSPORTCONFIG_h__
  #define __LIBTRANSPORTCONFIG_h__
  
  #ifdef WIN32
  #pragma warning(disable:4251)
  //your declarations that cause 4251
  #ifdef LIBTRANSPORT_EXPORTS
  #define LIBTRANSPORT_DECL __declspec(dllexport)
  #else
  #define LIBTRANSPORT_DECL __declspec(dllimport)
  #endif
  #else
  #define LIBTRANSPORT_DECL
  #endif
  
  #endif