Разные вопросы

Code:

// Getting a TScrollbar control to Show a proportional thumb:

procedure TForm1.Button1Click(Sender: TObject);

var

  info: TScrollInfo;

begin

  FillChar(info, SizeOf(info), 0);

  with info do

  begin

    cbsize := SizeOf(info);

    fmask  := SIF_PAGE;

    nPage  := ScrollBar1.LargeChange;

  end;

  SetScrollInfo(ScrollBar1.Handle, SB_CTL, info, True);

end;

// Same for a TStringGrid

procedure TForm1.Button1Click(Sender: TObject);

var

  info: TScrollInfo;

begin

  FillChar(info, SizeOf(info), 0);

  with info do

  begin

    cbsize := SizeOf(info);

    fmask  := SIF_ALL;

    GetScrollInfo(StringGrid1.Handle, SB_VERT, info);

    fmask := fmask or SIF_PAGE;

    nPage := 5 * (nmax - nmin) div StringGrid1.RowCount;

    // whatever number of cells you consider a "page"

end;

  SetScrollInfo(StringGrid1.Handle, SB_VERT, info, True);

end;