Happy,
You're almost there, you just need to call a second FM. The FM 'SSF_FUNCTION_MODULE_NAME' does not print the smartform. It returns the name of the FM that will print the smartform, data type rs381_fnam. There is no difference between FM_NAME or FNAME, you can call the variable whatever you want.
Try this code:
TABLES : MARA.
DATA : ITAB LIKE MARA OCCURS 0 WITH HEADER LINE.
* Add this variable, it's the name of the FM to call
DATA: G_FM_NAME TYPE RS381_FNAM.
SELECT-OPTIONS : MATERIAL FOR MARA-MATNR.
SELECT * FROM MARA INTO CORRESPONDING FIELDS OF TABLE ITAB WHERE MATNR IN MATERIAL.
CALL FUNCTION 'SSF_FUNCTION_MODULE_NAME'
EXPORTING
FORMNAME = 'ZSFORM_HAPPY'
* VARIANT = ' '
* DIRECT_CALL = ' '
IMPORTING
FM_NAME = G_FM_NAME "Make sure and uncomment this!
* 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.
*This is the Second FM Call
CALL FUNCTION G_FM_NAME
EXPORTING "Add the parameters of your smartform here
TABLES "Add table parameters if you have them
* EXCEPTIONS "Add exceptions if you want
.
This will print the smartform.
Best,
Eric
