How to read the input FORMAT of a Checkbox in list.

hi,
suppose i have,
WRITE CHK1 AS CHECKBOX INPUT OFF.
Now i have, grayed check box,
Problem. how to read from program, whether the checkbox is input off or on.
pls reply

Hi,
Check this example of how to use the Checkbox in a list..
REPORT ztest NO STANDARD PAGE HEADING.
DATA: BEGIN OF itab OCCURS 0,
            check,
            value(20),
          END OF itab.
SET PF-STATUS 'TEST1'.
itab-value = 'ETSAT'.
APPEND itab.
itab-value = 'ETSATADSF'.
APPEND itab.
itab-value = 'ETSAT'.
APPEND itab.
LOOP AT itab.
  WRITE: / itab-check AS CHECKBOX,
                itab-value.
ENDLOOP.
AT USER-COMMAND.
  DATA: wa LIKE itab.
  DATA: itab_download LIKE itab OCCURS 0 WITH HEADER LINE.
  IF sy-ucomm = 'DOWNLOAD'.
    DESCRIBE TABLE itab.
    DO sy-tfill TIMES.
      READ LINE sy-index FIELD VALUE itab-check.
      IF sy-subrc <> 0.
        EXIT.
      ENDIF.
      CHECK itab-check = 'X'.
      itab_download-value = itab-value.
      APPEND itab_download.
    ENDDO.
   download
    call function 'WS_DOWNLOAD'
         exporting
              filename = 'C:\TEST.XLS '
         tables
              data_tab = itab_download.
  ENDIF.
Thanks,
Naren

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