Error Checking and Handling

#include "stdafx.h"
#include <WinSock2.h>
int _tmain(int argc, _TCHAR* argv[])
{
	WSADATA wsaData;
	int Ret;
	//加载winsock库 第二个参数 用与其加载库版本有关信息填充这个结构。版本2.2
	if ((Ret = WSAStartup(MAKEWORD(2,2),&wsaData))!= 0)
	{
		printf("wsastartup failed with error %d \n",Ret);
		return 0;
	}


	if(WSACleanup() == SOCKET_ERROR)
	{
		printf("wsacleanup failed with error %d \n",WSAGetLastError());
	}
	return 0;
}