[Code]
function GetTickCount: DWORD;
  external 'GetTickCount@kernel32.dll stdcall';

var
  StartTick: DWORD;
  PercentLabel: TNewStaticText;
  ElapsedLabel: TNewStaticText;
  RemainingLabel: TNewStaticText;

function TicksToStr(Value: DWORD): string;
var
  I: DWORD;
  Hours, Minutes, Seconds: Integer;
begin
  I := Value div 1000;
  Seconds := I mod 60;
  I := I div 60;
  Minutes := I mod 60;
  I := I div 60;
  Hours := I mod 24;
  Result := Format('%.2d:%.2d:%.2d', [Hours, Minutes, Seconds]);
end;

procedure InitializeWizard;
begin
  PercentLabel := TNewStaticText.Create(WizardForm);
  PercentLabel.Parent := WizardForm.ProgressGauge.Parent;
  PercentLabel.Left := 0;
  PercentLabel.Top := WizardForm.ProgressGauge.Top +
    WizardForm.ProgressGauge.Height + 12;

  ElapsedLabel := TNewStaticText.Create(WizardForm);
  ElapsedLabel.Parent := WizardForm.ProgressGauge.Parent;
  ElapsedLabel.Left := 0;
  ElapsedLabel.Top := PercentLabel.Top + PercentLabel.Height + 4;

  RemainingLabel := TNewStaticText.Create(WizardForm);
  RemainingLabel.Parent := WizardForm.ProgressGauge.Parent;
  RemainingLabel.Left := 0;
  RemainingLabel.Top := ElapsedLabel.Top + ElapsedLabel.Height + 4;
end;

procedure CurPageChanged(CurrentPageId: Integer);
begin
  if CurrentPageId = wpInstalling then
    StartTick := GetTickCount;
end;

procedure CancelButtonClick(CurrentPageId: Integer; var Cancel, Confirm: Boolean);
begin
  if CurrentPageId = wpInstalling then
  begin
    Cancel := False;
    if ExitSetupMsgBox then
    begin
      Cancel := True;
      Confirm := False;
      PercentLabel.Visible := False;
      ElapsedLabel.Visible := False;
      RemainingLabel.Visible := False;
    end;
  end;
end;

procedure CurInstallProgressChanged(CurProgress, MaxProgress: Integer);
var
  CurTick: DWORD;
  LastTick: DWORD;

begin
  LastTick := GetTickCount;
  if (LastTick-CurTick) = 1000 then
  begin
  CurTick := GetTickCount;
  PercentLabel.Caption :=
    Format(ExpandConstant('{cm:done} %.2f %%'), [(CurProgress * 100.0) / MaxProgress]);
  ElapsedLabel.Caption :=
    Format(ExpandConstant('{cm:elapsed} %s'), [TicksToStr(CurTick - StartTick)]);
     if CurProgress > 0 then
      begin
      RemainingLabel.Caption :=
      Format(ExpandConstant('{cm:remaining} %s'), [TicksToStr(
        ((CurTick - StartTick) / CurProgress) * (MaxProgress - CurProgress))]);
      end;
  end;
end;