现在序号加上,但怎么控制这一列不能拖动,换句话说不能获取焦点?

procedure TForm1.DBGrid1ColumnMoved(Sender: TObject; FromIndex,
  ToIndex: Integer);
begin
  if FromIndex = 0 then//这里可根据你得情况设置,这里是不运行拖动第一列
  begin
    DBGrid1.Columns[ToIndex].Index := FromIndex;
  end;
end;

通过下列代码实现了:
procedure TForm1.DBGrid1ColEnter(Sender: TObject);
begin
if   Dbgrid1.SelectedField.FieldName='序号'   then
      if   Dbgrid1.SelectedIndex < Dbgrid1.FieldCount-1   then
           Dbgrid1.SelectedIndex:=Dbgrid1.SelectedIndex+1
           else
           Dbgrid1.SelectedIndex:=0;
end;