winsock库

1 int WSAStartup(
2                WORD wVersionRequested,//指定想要加载的winsock库
3                LPWSADATA lpWSAData//指向 WSADATA的指针，用来返回DLL库的详细信息
4 );

 1 typedef struct WSAData
 2 {
 3     WORD wVersion;    //库文件建议应用程序使用的版本
 4     WORD wHighVersion;    //库文件支持的最高版本
 5     char szDescription[WSADESCRIPTION_LEN+1];    //库描述字符串
 6     char szSystemStatus[WSASYS_STATUS_LEN+1];    //系统状态字符串
 7     unsigned short iMaxSockets;    //同时支持的最大套接字的数量
 8     unsigned short iMaxUdpDg;    //2.0版中已废弃的参数
 9     char FAR* lpVendorInfo;    //已废弃的参数
10 }WSADATA,FAR* LOWSADATA;

int WSACleanup(void);

1 #pragma comment(lib,"WS2_32")

 1 #include <winsock2.h>
 2 #pragma comment(lib,"WS2_32")
 3 class CInitSock
 4 {
 5 public:
 6     CInitSock(BYTE minorVer=2,BYTE majorVer=2)
 7     {
 8         WSADATA wsaData;
 9         WORD sockVersion = MAKEWORD(minorVer,majorVer);
10         if(::WSAStartup(sockVersion,&wsaData)!=0)
11         {
12             exit(0);
13         }
14     }
15     ~CInitSock()
16     {
17         ::WSACleanup();
18     }
19 };