一个创建多个线程的实例

unit Unit1;

interface

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

type
TForm1 = class(TForm)
Button1: TButton;
Label1: TLabel;
Label2: TLabel;
Label3: TLabel;
procedure Button1Click(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;

TMyThread = class(TThread) //自己的线程类，从TThread 继承
private
FCount: integer;
FOutLabel:TLabel;
protected
constructor Create(CreateSuspended: Boolean; OutLabel:TLabel);
procedure Execute; override;
procedure Output;
end;

var
Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
begin
TMyThread.Create(False, Label1);
TMyThread.Create(False, Label2);
TMyThread.Create(False, Label3);

end;

{ TMyThread }

constructor TMyThread.Create(CreateSuspended: Boolean; OutLabel: TLabel);
begin
FOutLabel:= OutLabel;
inherited Create(CreateSuspended);
end;

procedure TMyThread.Execute;
var
i: integer;
begin
for i:=0 to 10000 do
begin
FCount:= i;
Synchronize(Output);
end;
end;

procedure TMyThread.Output;
begin
FOutLabel.Caption:= inttostr(FCount);
end;

end.