Imprimir StringGrid com varias páginas

var
  X1, X2,Pagina,Ymax,BottomMargin: Integer;
  Y1, Y2, TopMargin,Y: Integer;
  TmpI: Integer;
  F: Integer;
  TR: TRect;

begin
 if not printdialog1.Execute then exit;
 Ymax := Printer.PageHeight - BottomMargin;
  Printer.Title := StringGrid1.Cells[7,1];
  Printer.BeginDoc;
  Printer.Canvas.Pen.Color  := 0;
  Printer.Canvas.Font.Name  := 'Times New Roman';
  Printer.Canvas.Font.Size  := 12;
  Printer.Canvas.Font.Style := [fsBold];
  Printer.Canvas.TextOut(0, 100, Printer.Title);
  TopMargin := 300;
  BottomMargin := 300;
  Y := TopMargin;

  for F := 0 to StringGrid1.ColCount-2 do
  begin
    X1 := 0;
    for TmpI := 0 to (F - 1) do
      X1 := X1 + 5 * (StringGrid1.ColWidths[TmpI]);
      Y1 := 300;
      X2 := 0;
    for TmpI := 0 to F do
      X2 := X2 + 5 * (StringGrid1.ColWidths[TmpI]);
      Y2 := 450;
      TR := Rect(X1, Y1, X2 -30, Y2);
      Printer.Canvas.Font.Style := [fsBold];
      Printer.Canvas.Font.Size := 7;
      Printer.Canvas.TextRect(TR, X1 + 5,350, StringGrid1.Cells[F, 0]);
      inc(y);
      Printer.Canvas.Font.Style := [];
    for TmpI := 0 to StringGrid1.RowCount-1 do
     begin
      Y1 := 150 * TmpI + 300;
      Y2 := 150 * (TmpI + 1) + 300;

 //     if Odd(TmpI) then
 //        Printer.Canvas.Brush.Color := clBtnFace
  //    else
         Printer.Canvas.Brush.Color := clWhite;

      TR := Rect(X1,Y1,X2 - 2, Y2);
      Printer.Canvas.TextRect(TR, X1 + 10, Y1 + 50, StringGrid1.Cells[F, TmpI]);
      Printer.Canvas.Brush.Color := clBlack;
      Printer.Canvas.FrameRect(TR);
      Printer.Canvas.Brush.Color := clWhite;
    end;
 //   y:=y+1;
 //   Caption:=IntToSTr(y);
 //   if Y > Ymax*8 then begin
//      Printer.NewPage;
//      Y := TopMargin;
//       end;
  end;

  end;