How to use select-options in the function module of import parameter ?

Question

Hi ...
   I have created a BAPI and tested in SWO1 tcode , by giving the single value for an company code ( BUKRS ) , it executed properly .
Same thing is working after implementing in a program .
so now it is working for fetching a single company code details .
My requirement is : I want to use select-options in program as well as in function module IN IMPORT PARAMETER.
Program :
REPORT  ZTEST.
TABLES : T001 , ZBAPI_STR .
TYPES : BEGIN OF TY_ITEM  .
          INCLUDE STRUCTURE ZBAPI_STR .
TYPES : END OF TY_ITEM .
DATA :WA_ITEM TYPE TY_ITEM ,
      ITEM LIKE STANDARD TABLE OF WA_ITEM INITIAL SIZE 0 .
PARAMETER : BUKRS TYPE ZBAPI_STR-BUKRS.
call function 'ZBAPI_FMT001'
  exporting
    bukrs         =  BUKRS
IMPORTING
  RETURN        =
  tables
    itemtab       = ITEM
IF ITEM IS NOT INITIAL .
  LOOP AT ITEM INTO WA_ITEM .
    WRITE : / WA_ITEM-BUKRS , WA_ITEM-BUTXT , WA_ITEM-ORT01 , WA_ITEM-LAND1 .
  ENDLOOP.
ENDIF.
FUNCTION MODULE :
FUNCTION ZBAPI_FMT001.
""Local Interface:
*"  IMPORTING
*"     VALUE(BUKRS) TYPE  EFG_TAB_RANGES
*"  EXPORTING
*"     VALUE(RETURN) TYPE  BAPIRET2
*"  TABLES
*"      ITEMTAB STRUCTURE  ZBAPI_STR
SELECT BUKRS BUTXT ORT01 LAND1 FROM T001 INTO TABLE ITEMTAB WHERE BUKRS = BUKRS .
ENDFUNCTION.
Regards
Deepa.

Answer 1

I have given a similiar example which i did
Declare a
Table type:Z_TT_PONUM             
Short text  :  Select options  PO Number
in SE11 tcode with row type eg: Z_ST_PONUM
create a structure (this will be the row type)
Structure          Z_ST_PONUM            
Short text         Select Options Field PO number
Compenent  Compent type
SIGN       BAPISIGN      Inclusion/exclusion criterion SIGN for range tables
OPTION       BAPIOPTION      Selection operator OPTION for range tables
LOW       EBELN                      Purchasing Document Number
HIGH       EBELN                      Purchasing Document Number
In the function module import
give as
I_PO_NUM     TYPE     Z_TT_PONUM     opt  pass value Select options  PO Number
Hope this is exactly what you want to know.
So you create a structure simliar to mine but the low an high whould be your component
then a table type  and then include that in the BAPI.
Then pass your select-option value to this BAPI when you call this BAPI in the program