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unit Unit2;

interface

uses
  Classes, sysutils, StdCtrls, SyncObjs;

type
  TDLThread = class(TThread)
  private
    { Private-Deklarationen }
    count: integer;
    GUI: TLabel;
  protected
    procedure Execute; override;
    procedure DoSync;
  public
    constructor Create(pGUI: TLabel);
  end;

implementation

{ TDLThread }

constructor TDLThread.Create(pGUI: TLabel);
begin
  GUI := pGUI;
  FreeOnTerminate := True;
  inherited Create(False);
  Suspend();
end;

procedure TDLThread.Execute;
begin
  { Thread-Code hier einfügen }
 while not terminated do
 begin
  count := count + 1;
  Synchronize(DoSync);
 end;
end;

procedure TDLThread.DoSync();
begin
  GUI.caption := inttostr(count);
end;

end.					

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var
  dlthreads : array of tdlthread;

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
begin
  dlthreads[0].Resume();
//dlthreads[1].Resume();
end;

procedure TForm1.Button2Click(Sender: TObject);
begin
  dlthreads[0].Suspend;
//dlthreads[1].Suspend;
end;

procedure TForm1.FormCreate(Sender: TObject);
begin
  setlength(dlthreads, 2);
  dlthreads[0] := tdlthread.Create(label1);
  dlthreads[1] := tdlthread.Create(label2);
end;

procedure TForm1.FormClose(Sender: TObject; var Action: TCloseAction);
begin
  dlthreads[0].Terminate();
//dlthreads[1].Terminate();
end;					

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constructor TDLThread.Create(pGUI: TLabel);
begin
  inherited Create(TRUE);  
  GUI := pGUI;
  FreeOnTerminate := True;
end;					

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procedure TDLThread.Execute;
begin
  { Thread-Code hier einfügen }
 while not terminated do
 begin
  sleep(1);
  count := count + 1;
  Synchronize(DoSync);
 end;
end;