Получить IP адрес за маршрутизатором

Оформил: DeeCo

{ 
This code requires a server running a script that generates a web 
page that has your IP address in it. 
This example uses http://www.whatismyip.com/ 
The script then searches for the first time 
that 'Your ip is ' shows up and then looks for a 
correctly formatted IP address from that point. 

This works using Delphi 6 Enterprise but should work with previous 
versions with little or no modification, I think. 
}

 unit Main;

 interface

 uses
   Windows, Messages, SysUtils, Variants, Classes,
   Graphics, Controls, Forms, Dialogs, Psock,
   NMHttp, StdCtrls, ExtCtrls, Menus, About,
   Winsock, ComCtrls;

 type
   TForm1 = class(TForm)
     Button1: TButton;
     NMHTTP1: TNMHTTP;
     Memo1: TMemo;
     Edit1: TEdit;
     MainMenu1: TMainMenu;
     File1: TMenuItem;
     Exit1: TMenuItem;
     Bevel1: TBevel;
     Bevel2: TBevel;
     procedure Button1Click(Sender: TObject);
     procedure Exit1Click(Sender: TObject);
   private
     { Private declarations }
   public
     { Public declarations }
   end;

 var
   Form1: TForm1;

 implementation

 uses ClipBrd;

 {$R *.dfm}

 procedure TForm1.Button1Click(Sender: TObject);
 var
   InetIP: string;
   WebAddress, SearchString: string;
   Buff, P, FT: PChar;
   BuffLen: Word;
   StartPos, StringLength, TempInt: Integer;
 begin
   WebAddress   := 'http://www.whatismyip.com/';
   SearchString := 'Your ip is ';
   Memo1.Clear;
   try
     NMHTTP1.Get(WebAddress);
   except
     on E: Exception do
     begin
       MessageDlg('Could not get IP Address! ' +
         'Please ensure you are connected to ' +
         'the Internet.', mtError, [mbOK], 0);
     end;
   end;
   Memo1.Text     := NMHTTP1.Body;
   Memo1.SelStart := 0;
   GetMem(FT, Length(SearchString) + 1);
   StrPCopy(FT, SearchString);
   BuffLen := Memo1.GetTextLen + 1;
   GetMem(Buff, BuffLen);
   Memo1.GetTextBuf(Buff, BuffLen);
   P := Buff + Memo1.SelStart + Memo1.SelLength;
   P := StrPos(P, FT);
   if P = nil then MessageBeep(0)
   else
   begin
     Memo1.SelStart  := P - Buff;
     Memo1.SelLength := Length(SearchString);
   end;
   StringLength := Memo1.SelLength;
   StartPos     := Memo1.SelStart + StringLength;
   tempint      := StartPos;
   InetIP       := '';
   while ((Buff[TempInt] in ['0'..'9']) or
     (Buff[TempInt] = '.')) do
   begin
     InetIP  := InetIP + Buff[TempInt];
     tempint := tempint + 1;
   end;
   FreeMem(FT, Length(SearchString) + 1);
   FreeMem(Buff, BuffLen);
   Edit1.Text := InetIP;
 end;

 procedure TForm1.Exit1Click(Sender: TObject);
 begin
   Close;
 end;

 end.