colocar um checkbox na grid, fixo para cada registro.

ai um exemplo meu.

Object DBCheckBox1: TDBCheckBox;
Caption = ´Senior´
DataField = ´Senior´
DataSource = DataSource 1
ValueChecked = ´True´ ou ´sim´
ValueUnChecked = ´False´ou ´nao´
Visible = false

end

Object Table1 : TTable
Databasename = ´alias´
TableName = ´tabela´



procedure TDbaForm.DBGrid1DrawColumnCell(Sender: TObject;
const Rect: TRect; DataCol: Integer; Column: TColumn;
State: TGridDrawState);
begin
if (gdFocused in State) and
(Column.Field = Table1Senior) then
begin
DBCheckBox1.SetBounds (
Rect.Left + DBGrid1.Left + 1,
Rect.Top + DBGrid1.Top + 1,
Rect.Right - Rect.Left,
Rect.Bottom - Rect.Top);
end;
end;

procedure TDbaForm.DBGrid1ColEnter(Sender: TObject);
begin
if DBGrid1.Columns [DBGrid1.SelectedIndex].
Field = Table1Senior then
DBCheckBox1.Visible := True
else
DBCheckBox1.Visible := False;
end;

procedure TDbaForm.DBGrid1KeyPress(Sender: TObject; var Key: Char);
begin
if DBCheckBox1.Visible and (Ord (Key) > 31) then
begin
Key := #0;
Table1.Edit;
DBCheckBox1.Checked := not
DBCheckBox1.Checked;
DBCheckBox1.Field.AsBoolean :=
DBCheckBox1.Checked;
end;
end;