[Delfino]

No se si necesitas este codigo :

Código Delphi [-]
procedure TForm1.DBGrid1CellClick(Column: TColumn);
begin
  //Making the drop-down pick list appear faster
  if Column.PickList.Count > 0 then
  begin
    keybd_event(VK_F2,0,0,0);
    keybd_event(VK_F2,0,KEYEVENTF_KEYUP,0);
    keybd_event(VK_MENU,0,0,0);
    keybd_event(VK_DOWN,0,0,0);
    keybd_event(VK_DOWN,0,KEYEVENTF_KEYUP,0);
    keybd_event(VK_MENU,0,KEYEVENTF_KEYUP,0);
  end;
end;