求AcceptEx与完成端口的配合使用代码！加分！

以下是msdn上的例子：

#include <stdio.h>
#include "winsock2.h"
#include "mswsock.h"

void main() {
//----------------------------------------
// Declare and initialize variables
WSADATA wsaData;
HANDLE hCompPort;
LPFN_ACCEPTEX lpfnAcceptEx = NULL;
GUID GuidAcceptEx = WSAID_ACCEPTEX;
WSAOVERLAPPED olOverlap;

SOCKET ListenSocket, AcceptSocket;
sockaddr_in service;
char lpOutputBuf[1024];
int outBufLen = 1024;
DWORD dwBytes;

//----------------------------------------
// Initialize Winsock
int iResult = WSAStartup( MAKEWORD(2,2), &wsaData );
if( iResult != NO_ERROR )
printf("Error at WSAStartup\n");

//----------------------------------------
// Create a handle for the completion port
hCompPort = CreateIoCompletionPort( INVALID_HANDLE_VALUE, NULL, (u_long)0, 0 );