Restrict select-options to only allow specific restrictions

*...............................................................
*: Report:  ZRESTRICT_SELOPT                                   :
*:                                                             :
*: Author:  www.SAPdev.co.uk                                   :
*:                                                             :
*: Date  :  2004                                               :
*:                                                             :
*: Description: Demonstrates how to restrict select options to :
*:              only allow specific restriction options:       :
*:                                     i.e.. EQ, NE, BT etc..  :
*:.............................................................:
REPORT ZRESTRICT_SELOPT.
* Include type pool SSCR
TYPE-POOLS sscr.
TABLES: EKPO.
* Selection-screen
select-options : so_ebeln for ekpo-ebeln,
                 so_ebelp for ekpo-ebelp.
* Variables for populating restriction data
DATA: gd_restrict TYPE sscr_restrict.   "structure containing 2 tables
DATA: gd_optlist  TYPE sscr_opt_list,   "header line for table 1
      gd_ass      TYPE sscr_ass.        "header line for table 2
************************************************************************
*INITIALIZATION.
INITIALIZATION.
* Restrict SO_EBELN to only except EQ, BT and NE.
  gd_optlist-name = 'KEY1'.      "Can be anything
  gd_optlist-options-eq = 'X'.
  gd_optlist-options-bt = 'X'.
  gd_optlist-options-ne = 'X'.
  APPEND gd_optlist TO gd_restrict-opt_list_tab.
  clear: gd_optlist.
  gd_ass-kind = 'S'.
  gd_ass-name = 'SO_EBELN'.
  gd_ass-sg_main = 'I'.
  gd_ass-sg_addy = SPACE.
  gd_ass-op_main = 'KEY1'.       "Must be same as above
  APPEND gd_ass TO gd_restrict-ass_tab.
  clear: gd_ass.
* Restrict SO_EBELP to only except CP, GE, LT.
  gd_optlist-name = 'KEY2'.      "Can be anything
  gd_optlist-options-cp = 'X'.
  gd_optlist-options-ge = 'X'.
  gd_optlist-options-lt = 'X'.
  APPEND gd_optlist TO gd_restrict-opt_list_tab.
  clear: gd_optlist.
  gd_ass-kind = 'S'.
  gd_ass-name = 'SO_EBELP'.
  gd_ass-sg_main = 'I'.
  gd_ass-sg_addy = SPACE.
  gd_ass-op_main = 'KEY2'.       "Must be same as above
  APPEND gd_ass TO gd_restrict-ass_tab.
  clear: gd_ass.
  CALL FUNCTION 'SELECT_OPTIONS_RESTRICT'
   EXPORTING
*    PROGRAM                      =
    restriction                  = gd_restrict
*    DB                           = ' '
   EXCEPTIONS
     TOO_LATE                     = 1
     REPEATED                     = 2
     SELOPT_WITHOUT_OPTIONS       = 3
     SELOPT_WITHOUT_SIGNS         = 4
     INVALID_SIGN                 = 5
     EMPTY_OPTION_LIST            = 6
     INVALID_KIND                 = 7
     REPEATED_KIND_A              = 8
     OTHERS                       = 9.
  IF sy-subrc <> 0.
    MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
          WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
  ENDIF.