#include "stdafx.h" #include <Windows.h> #include <iostream> using namespace std; int _tmain (int argc, LPTSTR argv[]) { HANDLE h=CreateMutex(NULL,TRUE,"AAAAAAA"); if(GetLastError()==ERROR_ALREADY_EXISTS){ CloseHandle(h); return 0; } system("pause"); CloseHandle(h); return 0; }