通过域名进行socket

请问如何利用SOCKET解析域名？
 比如我的一台服务器是绑定了域名，那些客户端想和服务器进行通信，但只能通过域名来通信。
 那该如何利用SOCKET靠域名和服务器通信啊？

#pragma comment(lib, "ws2_32")

#include <winsock2.h>
#include <stdio.h>
#include <assert.h>

int main()
{
    struct hostent *host;
    WSADATA wsaData;
    int ret;

    ret = WSAStartup(0x0202, &wsaData);
    if(ret)
    {
        printf("error in WSAStartup: %d\n", WSAGetLastError());
        return 0;
    }

    host = gethostbyname("");
    if(host == NULL)
    {
        printf("error in gethostbyname: %d\n", WSAGetLastError());
    }
    else
    {
        printf("name: %s\naddrtype; %d\naddrlength: %d\n",
            host->h_name, host->h_addrtype, host->h_length);
        printf("ip address: %s\n",
            inet_ntoa(*(struct in_addr*)host->h_addr_list[0]));
    }

    WSACleanup();
    return 0;
}

 输出：
 name:
 addrtype; 2
 addrlength: 4
 ip address: 202.108.22.5