unit Unit1;interfaceuses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, DB, DBTables, Grids, DBGrids;type
  TMyThread = class(TThread)
  protected
    procedure Execute; override;
  end;  TForm1 = class(TForm)
    Button1: TButton;
    DataSource1: TDataSource;
    DBGrid1: TDBGrid;
    Table1: TTable;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
    FMyThread: TMyThread;  public
    { Public declarations }
  end;var
  Form1: TForm1;implementation{$R *.dfm}procedure TForm1.Button1Click(Sender: TObject);
begin
  FMyThread := TMyThread.Create(True);
  FMyThread.FreeOnTerminate := True;
  FMyThread.Resume;  
end;{ TMyThread }procedure TMyThread.Execute;
begin
  Form1.Table1.Active := True;
end;end. 这段代码是启动一个线程, 让Table1.active:=True;我想再启动一个线程Table2.active:=True;  怎么做.