How to search file from presentation server

Hi All,
In a ABAP program i want to display a dialog box which will help me to find out any file from presentation server.That dialog box should be display after clicking on parameter on selection screen.Parameter is a simple variable,not a field from any internal table. so i can not use function module F4IF_INT_TABLE_VALUE_REQUEST
Please suggest me any function module which will satisfy my requirement.
Thank you.

Hi,
Check this example..
DATA: T_FILETABLE TYPE FILETABLE.
DATA: RC TYPE I.
DATA: USER_ACTION TYPE I.
CALL METHOD cl_gui_frontend_services=>file_open_dialog
  CHANGING
    file_table              = T_FILETABLE
    rc                      = RC
    USER_ACTION             = USER_ACTION
  EXCEPTIONS
    FILE_OPEN_DIALOG_FAILED = 1
    CNTL_ERROR              = 2
    ERROR_NO_GUI            = 3
    others                  = 4
IF sy-subrc <> 0.
MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
           WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.
Thanks,
Naren

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