Hi Ram,
you want to use the 3rd button event handler method for other 2 buttons right.
In DO_handle_event use the 3rd event handler method for all 3 buttons.
And in the event handler Distinguish the code using the code
htmlb_event_ex->event_server_name. which give the button name.
based on the button name u can place your code.
Try this piece of code.
Regards,
Rajya lakshmi ch