Grayed out input screen field

Question

Hi all,
How can I check the status of a screen field if it is displayed only in some case?
e.g. an input field in a sales order is grayed out
Thanks.

Answer 1

http://www.sapdevelopment.co.uk/reporting/selscr/selscr_loopscreen.htm
In the event AT SELECTION SCREEN OUTPUT you can do a LOOP AT SCREEN and turn off the ACTIVE indicator. Use the debugger to determine what the name of the field is that you want to hide.
something like
LOOP AT SCREEN. 
IF SCREEN-FIELDNAME = 'the name'. 
  SCREEN-ACTIVE = '0'.   
MODIFY SCREEN.
ENDLOOP
parameters : fname like rlgrap-filename.
      DATA : filename TYPE string.
      DATA : table1 TYPE filetable,
             rc TYPE i.
DATA : VAL LIKE DYNPREAD-FIELDVALUE.
data: dynfields type table of dynpread with header line.
PARAMETERS : R1 RADIOBUTTON GROUP RG  modif id abc.
PARAMETERS : R2 RADIOBUTTON GROUP RG modif id def.
AT SELECTION-SCREEN ON VALUE-REQUEST FOR fname.
  CALL METHOD cl_gui_frontend_services=>file_open_dialog
      EXPORTING
        default_filename = '*.*'
      CHANGING
        file_table       = table1
        rc               = rc.
    IF sy-subrc <> 0.
      MESSAGE e000(zXXX) WITH 'Error'.
    ENDIF.
read table table1 index 1 into fname.
IF fname cs '.XLS'.             "substitute .csv
dynfields-fieldname = 'R1'.
dynfields-fieldvalue = 'X'.
append dynfields.
dynfields-fieldname = 'R2'.
dynfields-fieldvalue = ' '.
append dynfields.
elseif fname cs '.DOC'.
dynfields-fieldname = 'R1'.
dynfields-fieldvalue = ' '.
append dynfields.
dynfields-fieldname = 'R2'.
dynfields-fieldvalue = 'X'.
append dynfields.
ENDIF.
call function 'DYNP_VALUES_UPDATE'
exporting
dyname = sy-cprog
dynumb = sy-dynnr
tables
dynpfields = dynfields
exceptions
others = 8.