How to use Exceptions for a function module

Hi folks,
I have created a new function module.Its working fine, but i am not aware of using exceptions for a function module. I hav just declared an exception in the 'exception' tab. Could any body explain me how to use that in my FM source code....Thanks...

Hi Shyam,
Have a look at this,
START-OF-SELECTION.
gd_file = p_infile.
CALL FUNCTION 'GUI_UPLOAD'
    EXPORTING
      filename                = gd_file
      has_field_separator     = 'X' "file is TAB delimited
    TABLES
      data_tab                = it_record
    EXCEPTIONS
      file_open_error         = 1
      file_read_error         = 2
      no_batch                = 3
      gui_refuse_filetransfer = 4
      invalid_type            = 5
      no_authority            = 6
      unknown_error           = 7
      bad_data_format         = 8
      header_not_allowed      = 9
      separator_not_allowed   = 10
      header_too_long         = 11
      unknown_dp_error        = 12
      access_denied           = 13
      dp_out_of_memory        = 14
      disk_full               = 15
      dp_timeout              = 16
      OTHERS                  = 17.
    IF sy-subrc NE 0.
      write: 'Error ', sy-subrc, 'returned from GUI_UPLOAD FM'.
      skip.
    endif.
Regards,
Sai

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Hi Shyam,
Have a look at this,
START-OF-SELECTION.
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