An SAP Consultant

"use the below function module it can use both for application and presentation...

CALL FUNCTION 'F4_DXFILENAME_TOPRECURSION'
EXPORTING
i_location_flag = 'A'   "a for application path and P for presntation palth
i_server        = ' '
i_path          = w_path
filemask        = ' '
fileoperation   = 'R'
IMPORTING
o_path          = w_path.

"or use the below function module..

CALL FUNCTION '/SAPDMC/LSM_F4_SERVER_FILE'
EXPORTING
directory  = w_path       "if any directory you want to show defalt
filemask   = ' '
IMPORTING
serverfile = w_path.        "the return file stores here