求索阁

1.单网卡的情况：
WORD wVersionRequested;
WSADATA wsaData;
wVersionRequested = MAKEWORD(1, 1);
WSAStartup(wVersionRequested, &wsaData);
hostent *p;
char s[128];
char *p2;
//获得计算机名字
gethostname(s, 128);
p = gethostbyname(s);
//获得IP地址保存在p2中
p2 = inet_ntoa(*((in_addr *)p->h_addr));
WSACleanup();

2.多网卡情况：
char szHostName[MAX_PATH];
memset(szHostName,0,MAX_PATH);
if(gethostname(szHostName,MAX_PATH) == SOCKET_ERROR)
   return FALSE;

struct sockaddr_in dest;
struct hostent *hostInfo;
if((hostInfo = gethostbyname(szHostName)) != NULL)
{
    for(int nIndex = 0; hostInfo->h_addr_list[nIndex] != NULL ;nIndex ++)
    {
        memcpy(&(dest.sin_addr), hostInfo->h_addr_list[nIndex],hostInfo->h_length);
    m_cmbIP.AddString(inet_ntoa(dest.sin_addr));
    }
}
   
m_cmbIP.SetCurSel(0);