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type
  TCBThreadTimer = class(TThread)
  private
    FTimer: TTimer;
    FSeconds, FMinutes, FHour: Integer;
    FTimerSecondsWereNulled: Boolean;
    FSynchronizeEvent: TNotifyEvent;
    procedure OnThreadTimer(ASender: TObject);
    procedure SynchronizeDisplayWithApp;
  public
    destructor destroy; override;
    constructor create(ASecond, AMinute, AHour: Integer);overload;
    procedure execute; override;
    procedure cbKillTimer;
    property Minute: Integer read FMinutes;
    property Hour: Integer read FHour;
    property SynchronizeEvent: TNotifyEvent read FSynchronizeEvent write FSynchronizeEvent;
  end;

implementation

uses SysUtils;

{ TCBThreadTimer }


//------------------------------------------------------------------------------
procedure TCBThreadTimer.cbKillTimer;
begin
  while not terminated do
    Terminate;
end;


//------------------------------------------------------------------------------
constructor TCBThreadTimer.create(ASecond, AMinute, AHour: Integer);
begin
  FSeconds := ASecond;
  FMinutes := AMinute;
  FHour := AHour;
  FTimer := TTimer.Create(nil);
  FTimer.Interval := 60000 - (ASecond * 1000);
  FTimer.Enabled := false;
  FTimer.OnTimer := OnThreadTimer;
  FTimerSecondsWereNulled := false;   
  FreeOnTerminate := true;
  inherited create(TRUE);
end;


//------------------------------------------------------------------------------
destructor TCBThreadTimer.destroy;
begin
  FTimer.OnTimer := nil;
  FreeAndNil(FTimer);
  inherited;
end;


//------------------------------------------------------------------------------
procedure TCBThreadTimer.execute;
begin
  resume;
  FTimer.Enabled := true;
  inherited;
end;


//------------------------------------------------------------------------------
procedure TCBThreadTimer.OnThreadTimer(ASender: TObject);
begin
  if not FTimerSecondsWereNulled then begin
    FTimer.Interval := 60000;
    FTimerSecondsWereNulled := true;
  end;
  inc(FMinutes);
  if FMinutes = 60 then begin
    FMinutes := 0;
    inc(FHour);
  end;
  if FHour = 24 then
    FHour := 0;
if assigned(FSynchronizeEvent) then
  Synchronize(SynchronizeDisplayWithApp);
end;


//------------------------------------------------------------------------------
procedure TCBThreadTimer.SynchronizeDisplayWithApp;
begin
  FSynchronizeEvent(Self);
end;					

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  FThreadTimer := TCBThreadTimer.create(LSecond, LMinute, LHour);
  FThreadTimer.SynchronizeEvent := SetTimeToDisplay;
  FThreadTimer.execute;					

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procedure TForm1.SetTimeToDisplay(ASender: TObject);
var
  LMinString, LHourString: String;
begin
  if FThreadTimer.Minute < 10 then
    LMinString := '0';
  LMinString := LMinString + IntToStr(FThreadTimer.Minute);
  if FThreadTimer.Hour < 10 then
    LHourString := '0';
  LHourString := LHourString + IntToStr(FThreadTimer.Hour);

  vSBar.Panels[2].Text := 'Serveruhrzeit: ' + LHourString + ':' + LMinString;
end;					

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procedure TCBThreadTimer.Execute; 
begin 
  while (not Terminated) and (not Application.Terminated) do
  begin
    Sleep(FInterval);
    Synchronize(TimerEvent);
  end;
end;