记得很久以前在黑基上看过的了，就修改注册表一个键值而已。

前几天翻了下旧文章，才想起有这个方法。呵呵，把它做成个小程序吧，免得老忘了。

program Open3389;

{$APPTYPE CONSOLE}

uses
  SysUtils, Registry, Windows;

var
reg:TRegistry;

procedure Help;
begin
  writeln('');
  writeln('======Win XP&2003 Open3389 by lanyu====== ');
  Writeln('Useag '+ExtractFileName(Paramstr(0))+' [/n]');
end;

begin
  { TODO -oUser -cConsole Main : Insert code here }
  if ParamCount>2 then
  begin
    help;
    exit;
  end;
  reg:=TRegistry.Create;
  reg.RootKey:=HKEY_LOCAL_MACHINE;
  reg.OpenKey('SYSTEM\CurrentControlSet\Control\Terminal Server',true);
  if ParamCount=1 then
  begin
  if Paramstr(1)='/n' then
  begin
    try
      reg.WriteBool('fDenyTSConnections',true);
      Writeln('Close 3389 successfully');
    except
      Writeln('Close 3389 fail');
    end;
  end
  else
    begin
      Help;
      Exit;
    end;
  end
  else
  begin
    try
      reg.WriteBool('fDenyTSConnections',false);
      writeln('Open 3389 successfully');
    except
      writeln('Open 3389 fail');
    end;
  end;
  reg.Free;

end.