VC++ 获取本地IP和计算机名

 1 int CIPDlg::GetLocalHostName(CString &strHostName)
 2 {
 3     char szHostName[256];
 4     int nRetCode;
 5     nRetCode = gethostname(szHostName, sizeof(szHostName));
 6     if(nRetCode != 0)
 7     {
 8         strHostName = _T("Not available");
 9         return WSAGetLastError();
10     }
11     strHostName = szHostName;
12     return 0;
13 }

 1 int CIPDlg::GetIPAddress(const CString &strHostName, CString &strIPAddress)
 2 {
 3     struct hostent FAR *lpHostEnt = gethostbyname(strHostName);
 4     if(lpHostEnt == NULL)
 5     {
 6         strIPAddress = _T("");
 7         return WSAGetLastError();
 8     }
 9     LPSTR lpAddr = lpHostEnt->h_addr_list[0];
10     if(lpAddr)
11     {
12         struct in_addr inAddr;
13         memmove(&inAddr, lpAddr, 4);
14         strIPAddress = inet_ntoa(inAddr);
15         if(strIPAddress.IsEmpty())
16         {
17             strIPAddress = _T("Not avilable");
18         }
19     }
20     return 0;
21 }