Save file location popup on ABAP report selection screen using FILE_SAVE_DIALOG

*Selecting a file to save too, plus inserting default file extension .xls
tables rlgrap.

DATA: ld_filename TYPE string,
      ld_path TYPE string,
      ld_fullpath TYPE string,
      ld_result TYPE i,
      gd_file TYPE c.

selection-screen begin of block m with frame.
    PARAMETERS: p_file TYPE  rlgrap-filename.
selection-screen end of block m.

* At selection screen
AT SELECTION-SCREEN ON VALUE-REQUEST FOR p_file.

* Display save dialog window
      CALL METHOD cl_gui_frontend_services=>file_save_dialog
        EXPORTING
*      window_title      = ' '
          default_extension = 'XLS'
          default_file_name = 'accountsdata'
          initial_directory = 'c:\temp\'
        CHANGING
          filename          = ld_filename
          path              = ld_path
          fullpath          = ld_fullpath
          user_action       = ld_result.
      p_file  = ld_fullpath.