1   
2   //---------------------------------------------------------------------------
3   
4   
5   #include <winsock.h>
6   #include <vcl.h>
7   #pragma hdrstop
8   
9   #include "Unit1.h"
10  //---------------------------------------------------------------------------
11  #pragma package(smart_init)
12  #pragma resource "*.dfm"
13  TForm1 *Form1;
14  //---------------------------------------------------------------------------
15  __fastcall TForm1::TForm1(TComponent* Owner)
16          : TForm(Owner)
17  {
18  }
19  //---------------------------------------------------------------------------
20  AnsiString  __fastcall TForm1::GetIPAddr ( AnsiString &Addr )
21  {
22  AnsiString ipAddress = "NOT FOUND!";
23  WSAData wsaData;
24  if (WSAStartup(MAKEWORD(1,1), &wsaData) == 0)
25    {
26    char ac[80];
27    if (gethostname(ac, sizeof(ac)) != SOCKET_ERROR)
28      {
29      struct hostent * phe = gethostbyname(ac);
30      if (phe != 0)
31        {    
32        int i;
33        struct in_addr addr;
34        for (i=0; phe->h_addr_list[i] != 0; i++)
35          {
36          memcpy(&addr, phe->h_addr_list[i], sizeof(struct in_addr));
37          if (i > 0)
38            Addr = Addr + ".";
39          Addr = Addr + inet_ntoa(addr);
40          }
41        }
42      }
43    }
44   else{
45     ipAddress= Addr;
46     return ipAddress;
47   }
48  WSACleanup();
49  
50  }
51  
52  void __fastcall TForm1::Button1Click(TObject *Sender)
53  {  AnsiString IPaddress;
54  
55   GetIPAddr(IPaddress);
56   ShowMessage(IPaddress);
57  }
58  //---------------------------------------------------------------------------