VC++ 获取本地IP和计算机名

主要是两个函数的使用，gethostname();、gethostbyname();

自定义两个函数GetLocalHostName获取计算机名、GetIPAddress获取IP地址

 int CIPDlg::GetLocalHostName(CString &strHostName)
 {
     char szHostName[];
     int nRetCode;
     nRetCode = gethostname(szHostName, sizeof(szHostName));
     if(nRetCode != )
     {
         strHostName = _T("Not available");
         return WSAGetLastError();
     }
     strHostName = szHostName;
     return ;
 }

 int CIPDlg::GetIPAddress(const CString &strHostName, CString &strIPAddress)
 {
     struct hostent FAR *lpHostEnt = gethostbyname(strHostName);
     if(lpHostEnt == NULL)
     {
         strIPAddress = _T("");
         return WSAGetLastError();
     }
     LPSTR lpAddr = lpHostEnt->h_addr_list[];
     if(lpAddr)
     {
         struct in_addr inAddr;
         memmove(&inAddr, lpAddr, );
         strIPAddress = inet_ntoa(inAddr);
         if(strIPAddress.IsEmpty())
         {
             strIPAddress = _T("Not avilable");
         }
     }
     return ;
 }