Function module RSEC_GENERATE_PASSWORD

hi experts,

when i was searching for some function module names i found a function moduel 'RSEC_GENERATE_PASSWORD' to generate a passward.when i used it in porgram then its giving the different outputs everytime.here i am writting this program.can anybody tell me what is the use of this function module?

REPORT YEX_PASS.

PARAMETERS : P_CHAR(40) LOWER CASE.

DATA : D_PASS(8),

D_LEN TYPE I.

D_LEN = 30.

CALL FUNCTION 'RSEC_GENERATE_PASSWORD'

EXPORTING

ALPHABET = P_CHAR

ALPHABET_LENGTH = D_LEN

FORCE_INIT = ' '

OUTPUT_LENGTH = 8

• DOWNWARDS_COMPATIBLE = ' '

IMPORTING

OUTPUT = D_PASS

• EXCEPTIONS

• SOME_ERROR = 1

• OTHERS = 2

.

IF SY-SUBRC <> 0.

• MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO

• WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.

ENDIF.

WRITE : / D_PASS.