unitdns.pas

< Delphi网络通信协议分析与应用实现>>一书的源代码。

unit UnitDNS;

interface

uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,registry,
  StdCtrls;

type
  TForm1 = class(TForm)
    Label1: TLabel;
    Edit1: TEdit;
    Button1: TButton;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.DFM}

procedure TForm1.Button1Click(Sender: TObject);
var
    reg:TRegistry;
    re:boolean;
    dns:string;
begin
{    CopyRight (C) Bowman      }
{    [e-mail]    }

  reg:=TRegistry.Create();
  try
    //open root :  HKEY_LOCAL_MACHINE
    Reg.RootKey :=  HKEY_LOCAL_MACHINE;
    //open key
    //win NT
    re:=Reg.OpenKey('SYSTEM\CurrentControlSet\Services\Tcpip\Parameters',
                    false);
    //sucess
    if re then
        edit1.text:=Reg.ReadString('NameServer')
    else
        edit1.text:='Failed to get DNS Name';
  finally
    Reg.CloseKey;
    Reg.Free;
  end;
end;

end.