Using external program variables in your program

when your program requires external program variables which is not in scope of your program, you can use this code to acheive.

DATA : v_auth(22) TYPE c VALUE '(SAPMV45A)XFPLT-AUTWV'.

FIELD-SYMBOLS: <fs_auth_amt>.

ASSIGN (v_auth) TO <fs_auth_amt>.
IF sy-subrc = 0.
" do processing here...
ENDIF.