일반 ALV가 아니고 온라인 ALV를 만들고 있습니다.

ALV 스크린에서 행삭제 버튼을 만들고 싶은데 아는게 없다보니

로직을 어떻게 넣어서 구성해야 할지 잘 모르겠습니다. 

현재 ALV 스크린에 기본 버튼은 있는 상태구요 행삽입, 행추가, 행삭제, 행복제 버튼은

없습니다. 지금 필요한것은 행삭제만 필요합니다. 

저의 로직을 조금 보여 드리자면  선언부 입니다.
*---------------------------------------------------------------------------*
PROGRAM zscb_test001.

*- A L V -------------------------------------------------------------------*
TYPE-POOLS : slis.
DATA: BEGIN OF gt_exctab OCCURS 10,
        button  LIKE sy-ucomm,
      END OF gt_exctab.

DATA: fieldcat TYPE slis_t_fieldcat_alv,
      fieldcat_ln LIKE LINE OF fieldcat,
      p_f2code         LIKE sy-ucomm       VALUE  '&ETA'.

DATA: ok_code LIKE sy-ucomm,
      save_ok LIKE sy-ucomm,
      g_container TYPE scrfname VALUE 'BCALV_GRID_DEMO_0100_CONT1',
      grid1  TYPE REF TO cl_gui_alv_grid,
      g_custom_container TYPE REF TO cl_gui_custom_container,
      gt_fieldcat type lvc_t_fcat,
      pt_fieldcat type lvc_t_fcat,
      ls_fcat type lvc_s_fcat,
      gs_layout TYPE lvc_s_layo,
      g_max TYPE i VALUE 100,
      l_pos        TYPE i VALUE 0,
      lt_exclude type ui_functions,
      lt_f4 type lvc_t_f4 with header line,
      rs_selfield TYPE slis_selfield.


* screen 선언
DATA: gs_zsailing LIKE zsailing_s_001,
      gs_zcustom  LIKE zcustom_s_001.

* internal table 선언
DATA: BEGIN OF gt_outtab OCCURS 0,
        regno    LIKE zsailing_t_001-regno,     "등록번호
        io       LIKE zsailing_t_001-io,        "구분자
        buino    LIKE zcustom_t_001-buino,      "거래자 등록번호
        sdate    LIKE zsailing_t_001-sdate,     "날짜
        bname    LIKE zcustom_t_001-bname,      "거래자 상호
        bcond    LIKE zcustom_t_001-bcond,      "거래자 업태
        beven    LIKE zcustom_t_001-beven,      "거래자 종목
        buibd    LIKE zsailing_t_001-buibd,     "거래내역 text
        blans    LIKE zsailing_t_001-blans,     "공란수
        waers    LIKE zsailing_t_001-waers,     "통화키
        taxpe    LIKE zsailing_t_001-taxpe,     "항목별 세액
        suppr    LIKE zsailing_t_001-suppr,     "공급가액
        taxpr    LIKE zsailing_t_001-taxpr,     "세액
        t_cost1  LIKE zsailing_t_001-suppr,     "공급원가
        t_cost2  LIKE zsailing_t_001-suppr,     "공급가액 + 세액
        armcd    LIKE zsailing_t_001-armcd,     "신고자주류코드(도매)
        mccod    LIKE zsailing_t_001-mccod,     "주류코드(소매)
        blank    LIKE zsailing_t_001-blank,     "공란
        celltab  TYPE lvc_t_styl,
        del(1)   TYPE c,
      END OF gt_outtab.

DATA: gt_outtab2 LIKE zcustom_t_001 OCCURS 0 WITH HEADER LINE.
DATA: gt_outtab3 LIKE zsailing_t_001 OCCURS 0 WITH HEADER LINE.

* data 선언
DATA: l_flagcurr LIKE zsailing_s_001-waers.
DATA: g_num LIKE zsailing_t_001-regno.
DATA: l_num(4) TYPE c VALUE '0000'.
DATA: lt_celltab TYPE lvc_t_styl,
      l_index TYPE i.

테이블을 ALV스크린에 나타낸 펑션입니다.
*--------------------------------------------------------------------------*
form build_fieldcat.

  call function 'LVC_FIELDCATALOG_MERGE'
       exporting
            i_structure_name = 'zsc_s_001'
       changing
            ct_fieldcat      = pt_fieldcat.

  loop at pt_fieldcat into ls_fcat.
       if ls_fcat-fieldname eq 'BUIBD'
       or ls_fcat-fieldname eq 'BLANS'
       or ls_fcat-fieldname eq 'WAERS'
       or ls_fcat-fieldname eq 'ARMCD'
       or ls_fcat-fieldname eq 'MCCOD'
       or ls_fcat-fieldname eq 'BLANK'
       or ls_fcat-fieldname eq 'SUPPR'
       or ls_fcat-fieldname eq 'TAXPE'.

      ls_fcat-edit = 'X'.
      ls_fcat-checktable = '!'.        "do not check foreign keys

      modify pt_fieldcat from ls_fcat.
    endif.
  endloop.

endform.
*--------------------------------------------------------------------------*