Автор: http://www.swissdelphicenter.ch

uses QRPrntr;

procedure SaveQuickReportToStream(AQuickReport: TQuickRep; AStream: TStream);
var
  PL: TQRPageList;
  I: Integer;
begin
  PL := nil;
  try
    PL := TQRPageList.Create;
    PL.Stream := TQRStream.Create(100000);
    AQuickReport.Prepare;
    PL.LockList;
    try
      for I := 1 to AQuickReport.QRPrinter.PageCount do
        PL.AddPage(AQuickReport.QRPrinter.GetPage(I));
      PL.Finish;
    finally
      PL.UnlockList;
    end;
    PL.Stream.SaveToStream(AStream);
  finally
    FreeAndNil(PL);
  end;
end;

procedure TForm1.Button1Click(Sender: TObject);
var
  stream: TFileStream;
begin
  stream := TFileStream.Create('c:\quickreport.dat', fmCreate);
  QuickReportToStream(QuickRep1, stream);
  stream.Free;
end;