Table maintenace - adding my own screen fields

Question

Hi, I made a table zx with 4 columns and table maintenace also. Besides I need a column on the screen wich is not exist in my table. This column must be fiiled  by values that are taken according values of first column..
I add this column on the screen by se80 and made such changes in code
PROCESS BEFORE OUTPUT.
MODULE LISTE_INITIALISIEREN.
LOOP AT EXTRACT WITH CONTROL
  TCTRL_ZPM_144_EQ_STTYP CURSOR NEXTLINE.
   MODULE LISTE_SHOW_LISTE.
ENDLOOP.
PROCESS AFTER INPUT.
MODULE LISTE_EXIT_COMMAND AT EXIT-COMMAND.
MODULE LISTE_BEFORE_LOOP.
LOOP AT EXTRACT.
   MODULE LISTE_INIT_WORKAREA.
   CHAIN.
    FIELD ZPM_144_EQ_STTYP-EQART .
    FIELD ZPM_144_EQ_STTYP-STTYPE_10 .
    FIELD ZPM_144_EQ_STTYP-STTYPE_20 .
    FIELD ZPM_144_EQ_STTYP-STTYPE_30 .
    FIELD ZPM_144_EQ_STTYP-STTYPE_40 .
    MODULE INIT_EARTX.                                                    <--- my module
    MODULE SET_UPDATE_FLAG ON CHAIN-REQUEST.
   ENDCHAIN.
   FIELD VIM_MARKED MODULE LISTE_MARK_CHECKBOX.
   CHAIN.
    FIELD ZPM_144_EQ_STTYP-EQART .
    MODULE LISTE_UPDATE_LISTE.
   ENDCHAIN.
ENDLOOP.
MODULE LISTE_AFTER_LOOP.:
MODULE INIT_EARTX INPUT.
  DATA: t_EARTX TYPE TABLE OF  T370K_T-EARTX WITH HEADER LINE.
  SELECT SINGLE EARTX FROM T370K_T
    INTO t_EARTX
    WHERE EQART = ZPM_144_EQ_STTYP-EQART AND
          SPRAS = SY-LANGU.
  APPEND t_EARTX.
ENDMODULE.       
But I don't know how to display values on the screen. I know that it must be done ib PBO but HOW???

Answer 1

Hello John
You should not modify the flow logic of the automatically generated dynpros. Instead, use the maintenance events of the view.
<a href="http://help.sap.com/saphelp_nw04/helpdata/en/91/ca9f0ea9d111d1a5690000e82deaaa/content.htm">Extended Table Maintenance Events</a>
In your case you may use <u><b>Event 26 before displayed data is output in a list</b></u> or <u><b>Event AA instead of the standard data read routine</b></u>.
Please refer to the SAP documentation for details of implementing this events.
The big advantage over your approach is that when you completely regenerate the dynpros your coding will be lost whereas the events remain.
Regards
  Uwe