Question about editing tableView

I looked at BSP_SAMPLES application to see how tableView edit works. Unfortunately, i'm unable to see where the changes is saved. I put a break point in the DO_HANDLE_DATA event but the value in the model is already changed. I thought DO_HANDLE_DATA is the first event called once the user click or submit the form.

Oh one more thing, I created a very simple MVC appl. just display and edit itab from flights table using tableView. I put break point on DO_INIT, DO_REQUEST and DO_HANDLE_DATA. When I run the program, I hit the break point in DO_INIT and DO_REQUEST, but not DO_HANDLE_DATA. I have no clue why it doesn't stop on DO_HANDLE_DATA.

Any information to get me over this hump is greatly appreciated.

Regards,

Iwan