IP einer URL herausfinden

[chrisw]

Delphi-Quellcode:

uses winsock......;
function GetIPFromHost (var HostName, IPaddr, WSAErr: string): Boolean;
type
  Name = array[0..100] of Char;
  PName = ^Name;
var
  HEnt: pHostEnt;
  HName: PName;
  WSAData: TWSAData; 
  i: Integer; 
begin
  Result := False;
  if WSAStartup($0101, WSAData) <> 0 then begin
    WSAErr := 'Winsock is not responding."'; 
    Exit;
  end;
  IPaddr := ''; 
  New(HName);
  if GetHostName(HName^, SizeOf(Name)) = 0 then
  begin
    HostName := StrPas(HName^);
    HEnt := GetHostByName(HName^);
    for i := 0 to HEnt^.h_length - 1 do 
     IPaddr :=
      Concat(IPaddr,
      IntToStr(Ord(HEnt^.h_addr_list^[i])) + '.');
    SetLength(IPaddr, Length(IPaddr) - 1); 
    Result := True;
  end
  else begin
   case WSAGetLastError of
    WSANOTINITIALISED:WSAErr:='WSANotInitialised';
    WSAENETDOWN      :WSAErr:='WSAENetDown';
    WSAEINPROGRESS   :WSAErr:='WSAEInProgress';
   end;
  end;
  Dispose(HName);
  WSACleanup;
end;


procedure TForm1.Button1Click(Sender: TObject);
var a,s,e:string;
begin
  a:= 'www.google.de';
  GetIPFromHost(a,s,e);
  showmessage(s);
end;