27.boost多线程

 #define _CRT_SECURE_NO_WARNINGS
 #include <boost/thread.hpp>
 #include <iostream>
 #include <Windows.h>
 using namespace std;
 using namespace boost;

 void main()
 {
     boost::thread t1([]() {MessageBoxA(, "", "", ); });
     boost::thread t2([]() {MessageBoxA(, "", "", ); });
     cin.get();
 }