Keyboard not allowed in a specified cell of StringGrid

[asdf]

StringGrid1.Options:=StringGrid1.Options+[goEditing];

How can I protect a specified cell from entering data by using keyboard ?

[typo]

Code: [Select]

procedure TForm1.StringGrid1SelectCell(Sender: TObject; aCol, aRow: Integer;
  var CanSelect: Boolean);
begin
  if (aCol = 1) and (aRow = 1) then
    CanSelect := False;
end;