Sample
CALL METHOD cl_gui_frontend_services=>file_save_dialog
EXPORTING
default_extension = 'CSV'
default_file_name = lv_name
file_filter = lv_filter
CHANGING
filename = lv_name "filename
path = lv_path "path WITHOUT FILE NAME
fullpath = lv_fullpath "full path INCLUDING FILE NAME
user_action = lv_uact
.
