F4_FILENAME - For selecting a local file from a Selection-Screen

This code in ERP will allow me to drill down to my local drive to select a file:
However, anybody know a similar Function Module in BW to do this?
F4_Filename does not exist, at least in our BW environment.
Thank-You.
PARAMETER: p_locat LIKE rlgrap-filename
DEFAULT '/interfaces_r3/inbound/archive/RGIS/RGISTOSAP.TXT.20061008'.
AT SELECTION-SCREEN ON VALUE-REQUEST FOR p_locat.
      PERFORM get_file USING p_locat.
form get_file using    p_locat.
DATA: v_file LIKE ibipparms-path.
MOVE: p_locat TO v_file.
DATA: v_repid LIKE syst-repid,
        v_dynnr LIKE syst-dynnr.
v_repid = syst-repid.
v_dynnr = syst-dynnr.
CALL FUNCTION 'F4_FILENAME'
    EXPORTING
      program_name = v_repid
      dynpro_number = v_dynnr
     field_name    = field
    IMPORTING
      file_name     = v_file.
MOVE: v_file TO p_locat.

Hopefully, the class is in BW.
report zrich_0001.
data: ifiletable type filetable.
data: xfiletable like line of ifiletable.
data: rc type i.
parameters: p_file1 type localfile default'C:test.txt'.
at selection-screen on value-request for p_file1.
call method cl_gui_frontend_services=>file_open_dialog
   EXPORTING
*    WINDOW_TITLE            =
*    DEFAULT_EXTENSION       =
*    DEFAULT_FILENAME        =
*    FILE_FILTER             =
     INITIAL_DIRECTORY       = 'C:'
*    MULTISELECTION          =
changing
    file_table              = ifiletable
    rc                      = rc
*    USER_ACTION             =
EXCEPTIONS
    FILE_OPEN_DIALOG_FAILED = 1
    CNTL_ERROR              = 2
    ERROR_NO_GUI            = 3
    others                  = 4.
read table ifiletable into xfiletable index 1.
if sy-subrc = 0.
p_file1 = xfiletable-FILENAME.
endif.
Regards,
Rich Heilman

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F4_FILENAME - For selecting a local file from a Selection-Screen

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