Удаление и добавление столбцов и колонок

Code:

procedure TForm1.Button1Click(Sender: TObject);

var

  i, k: Integer;

begin

  with StringGrid1 do

    for i := 0 to ColCount - 1 do

      for k := 0 to RowCount - 1 do

        Cells[i, k] := '';

end;

Code:

// Many times faster!

procedure TForm1.Button2Click(Sender: TObject);

var

  I: Integer;

begin

  for I := 0 to StringGrid1.RowCount - 1 do

    StringGrid1.Rows[I].Clear();

end;