初始化Winsock DLL类

 

 

//The WSAStartup function initiates use of the Winsock DLL by a process.
int WSAStartup(
  __in          WORD wVersionRequested,
  __out         LPWSADATA lpWSAData
);
//The WSACleanup function terminates use of the Winsock 2 DLL (Ws2_32.dll).
int WSACleanup(void);

 

 

 

#pragma once
#include <WinSock2.h>
#pragma comment(lib, "WS2_32")

class CWSAInit
{
public:
    CWSAInit(BYTE minor_ver = 2, BYTE major_ver = 2);
    ~CWSAInit(void);
};

 

#include "WSAInit.h"

CWSAInit::CWSAInit(BYTE minor_ver, BYTE major_ver)
{
    WSADATA wsa_data;
    WORD sock_ver = MAKEWORD(minor_ver, major_ver);
    if(::WSAStartup(sock_ver, &wsa_data) != 0) {
        exit(0);
    }
}
CWSAInit::~CWSAInit(void)
{
    ::WSACleanup();
}