Hi
, Urgent
Please, how I sorting the listview in the columns ?

eg: I have

hour_ini hou_fim room
18:20 18:50 1
18:50 19:20 1
07:00 07:30 2
07:30 08:00 2
06:00 06:30 3
Is sorted for room , I want sort for hour_ini, How do I ?
07:00