FM_NAME in Smrtform driver program

While writing smart form driver program I am first calling function,

"SSF_FUNCTION_MODULE_NAME" through pattern in se38.

<b>But when I try to call FM_NAME after it it says it does not exist.</b>

How do I call FM_NAME then ?

But many standard Smartform driver program has the following format:

CALL FUNCTION 'SSF_FUNCTION_MODULE_NAME'

EXPORTING

FORMNAME = P_T_FNAME

• VARIANT = ' '

• DIRECT_CALL = ' '

IMPORTING

FM_NAME = FM_NAME

EXCEPTIONS

NO_FORM = 1

NO_FUNCTION_MODULE = 2

OTHERS = 3

.

IF SY-SUBRC <> 0.

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

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

ENDIF.

• CALL THE FUNCTION MODULE NAME RETRIEVED ***

• REPLACE THE FUNCTION MODULE NAME WITH A VARIABLE ???

• "'1BCDWB/SF00000002'

CALL FUNCTION FM_NAME

EXPORTING

• ARCHIVE_INDEX =

• ARCHIVE_INDEX_TAB =

• ARCHIVE_PARAMETERS =

• CONTROL_PARAMETERS =

• MAIL_APPL_OBJ =

• MAIL_RECIPIENT =

• MAIL_SENDER =

• OUTPUT_OPTIONS =

• USER_SETTINGS = 'X'

ZPLMECFORMS = T_ZPLMECFORMS

AENR = T_AENR

• IMPORTING

• DOCUMENT_OUTPUT_INFO =

• JOB_OUTPUT_INFO =

• JOB_OUTPUT_OPTIONS =

• EXCEPTIONS

• FORMATTING_ERROR = 1

• INTERNAL_ERROR = 2

• SEND_ERROR = 3

• USER_CANCELED = 4

• OTHERS = 5

.