How to provide the F4 functionality to the files on application server

Hi,
How to provide the F4 functionality to the files on application server at selection screen.as it is F4_FILENAME for files on desktop , is there any Function module for this purpose also. I did a search in R/3 but didnt get any FM .Please advise.
Regards,
sam.

You can get to it using frontend class CL_GUI_FRONTEND_SERVICES if you know the host name and have the correct permissions, for example, this program works great for me in my system.
report zrich_0001 .
data: ifiletable type filetable.
data: xfiletable like line of ifiletable.
data: rc type i.
parameters: p_file1 type localfile default'\sapprdusr'.
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       = '\sapprdusr'
*    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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