How to refresh the table control

Question

hi experts,
i used bapi to update the changes made in data of table control in modulepool.
like i <b>changed serial number and short text of equipment</b> . <b>now when
i simultaneously go for transaction ie02  i,e equipment change in another session with table control open in other session , and now i changed data of particular equipment number in ie02 , now when i use refresh button in table control that change should be affected.  how would be the logic for the refresh button</b>
<b>when i use the refresh button in the table control , screen should be refreshed or filled with updated data. so what is the flow and logic for that.</b>

Answer 1

example
REPORT demo_dynpro_tabcont_loop.
CONTROLS flights TYPE TABLEVIEW USING SCREEN 100.
DATA: ok_code TYPE sy-ucomm,
save_ok TYPE sy-ucomm.
DATA: itab TYPE TABLE OF demo_conn,
fill TYPE i.
TABLES demo_conn.
DATA: lines TYPE i,
limit TYPE i.
SELECT * FROM spfli INTO CORRESPONDING FIELDS OF TABLE itab.
CALL SCREEN 100.
MODULE status_0100 OUTPUT.
SET PF-STATUS 'SCREEN_100'.
DESCRIBE TABLE itab LINES fill.
flights-lines = fill.
ENDMODULE.
MODULE fill_table_control OUTPUT.
READ TABLE itab INTO demo_conn INDEX flights-current_line.
ENDMODULE.
MODULE cancel INPUT.
LEAVE PROGRAM.
ENDMODULE.
MODULE read_table_control INPUT.
lines = sy-loopc.
MODIFY itab FROM demo_conn INDEX flights-current_line.
ENDMODULE.
MODULE user_command_0100 INPUT.
save_ok = ok_code.
CLEAR ok_code.
CASE save_ok.
WHEN 'REFRESH'.
refresh : itab.
WHEN 'NEXT_LINE'.
flights-top_line = flights-top_line + 1.
limit = fill - lines + 1.
IF flights-top_line > limit.
flights-top_line = limit.
ENDIF.
WHEN 'PREV_LINE'.
flights-top_line = flights-top_line - 1.
IF flights-top_line < 0.
flights-top_line = 0.
ENDIF.
WHEN 'NEXT_PAGE'.
flights-top_line = flights-top_line + lines.
limit = fill - lines + 1.
IF flights-top_line > limit.
flights-top_line = limit.
ENDIF.
WHEN 'PREV_PAGE'.
flights-top_line = flights-top_line - lines.
IF flights-top_line < 0.
flights-top_line = 0.
ENDIF.
WHEN 'LAST_PAGE'.
flights-top_line = fill - lines + 1.
WHEN 'FIRST_PAGE'.
flights-top_line = 0.
ENDCASE.
ENDMODULE.
PROCESS BEFORE OUTPUT.
MODULE status_0100.
LOOP WITH CONTROL flights.
MODULE fill_table_control.
ENDLOOP.
In the screen
PROCESS AFTER INPUT.
MODULE cancel AT EXIT-COMMAND.
LOOP WITH CONTROL flights.
MODULE read_table_control.
ENDLOOP.
MODULE user_command_0100.
<b>rewards point for helpful answer</b>