void CGetIpDlg::OnQuery()
{
 char wsHostName[128];                                                                             // 存储主机名

 if (gethostname(wsHostName, 128) == 0)                                                   //正确的情况
 {
  m_HostName.SetWindowText(wsHostName);
  struct hostent* pHost;
  int client;

  pHost = gethostbyname(wsHostName);                                                     //pHost返回的是指向主机的列表
  for (client = 0; pHost != NULL && pHost->h_addr_list[client] != NULL; client++)
  {
    LPCSTR psz = inet_ntoa (*(struct in_addr *)pHost->h_addr_list[client]);//得到指向ip的psz变量
    m_Ip.AddString(psz);
  }
 }
 
}