dbgrid或dbgrideh中只有oncellclick和ondblclick事件，希望在单击indicator(指示器)时也能实现oncellclick的功能;在使用ondblclick事件时

[helihuhu]

dbgrid或dbgrideh中只有oncellclick和ondblclick事件，希望在单击indicator(指示器)时也能实现oncellclick的功能(如；使当前记录的各字段的值在各控件中显示)；
在使用ondblclick事件时，要使双击title(标题)时无效(即，双击标题不执行ondblclick功能)，怎么做?

[DWGZ]

unit Unit1;

interface

uses
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
StdCtrls, Grids, DBGrids;

type
TForm1 = class(TForm)
Button1: TButton;
DBGrid1: TDBGrid;
procedure DBGrid1MouseUp(Sender: TObject; Button: TMouseButton;
Shift: TShiftState; X, Y: Integer);
private
{ Private declarations }
public
{ Public declarations }
end;

var
Form1: TForm1;

implementation

{$R *.DFM}

procedure TForm1.DBGrid1MouseUp(Sender: TObject; Button: TMouseButton;
Shift: TShiftState; X, Y: Integer);
var
Cell: TGridCoord;
begin
Cell := DBGrid1.MouseCoord(X,Y);
if (Button = mbLeft) and (Cell.X < 1) and (Cell.Y >= 0) then
ShowMessage('Indicator click');
end;

end.

[helihuhu]

感谢GWDZ帮我解决了第一个问题，不过如果可以麻烦你能给具体解释以下。
另外，还有第二个问题，能否解决呢？

如果有办法我将给全分