Adding a parameter in /SAPAPO/CIF_DELTA3

Question

I have a requirement for adding a new parameter for for the method RELEVANT_FOR_COMPARE_R3_STOCK .  This method is coming under class /SAPAPO/IF_EX_CIF_DELTA3 . This class is coming under /SAPAPO/CIF_DELTA3 . 
when I went to method RELEVENT_FOR_COMPARE_R3_STOCK and pressing on the parameter button it will shows the parameters .  Here i want to add new parameter . when I am clicking change button to create new parameter it is giving message as "Exit classes/interfaces can only be edited using the BADI Builder" . Please any body suggest me the step by step procedure for adding the new parameter , type , associated type .

Answer 1

Hi
You can check for the condition in at selection-screen output and can make the required parameters appear dynamically
check the following code
at selection-screen output.
  if w_flag eq 'N'.
    loop at screen.
      if screen-group1 eq 'G1'.
        screen-active = 0.
      endif.                           " IF SCREEN-GROUP1 EQ 'G1'
      modify screen.
    endloop.                           " LOOP AT SCREEN
  else.
    loop at screen.
      if screen-group1 eq 'G1'.
        screen-active = 1.
        w_flag1 = 'Y'.
      endif.                           " IF SCREEN-GROUP1 EQ 'G1'
      if screen-name = 'P_USER'.
        screen-input = 0.
      endif.                           " IF SCREEN-NAME EQ P_USER
      modify screen.
    endloop.                           " LOOP AT SCREEN
    w_flag = 'N'.
  endif.                               " IF W_FLAG EQ 'N'
regards,
padma