获取文件路径名

FORM frm_uplod_name  CHANGING p_fname TYPE rlgrap-filename.
  CALL FUNCTION 'F4_FILENAME'
    EXPORTING
      program_name  = syst-cprog
      dynpro_number = syst-dynnr
      field_name    = ' '
    IMPORTING
      file_name     = p_fname.
ENDFORM.                    " FRM_UPLOD_NAME