Indeed these powerful ABAP/4 functions are very interesting and can bring some advantages. Improve your home development easily. They belong to standard objects and should never be changed.

• Ws_upload
  Transfer files from the frontend to the application server.
• Ws_download
  Transfer files from the application server to the frontend.
• Ws_excel
  Download files at the frontend in excel format.
• Bp_joblog_read
  Fetch job log executions.
• Rs_send_mail_for_spoollist
  Send message from ABAP/4 program to SAPoffice.
• Bp_event_raise
  Trigger an event from ABAP/4 program.
• So_wind_spool_list
  Browse printer spool numbers according to user informed.
• So_spool_read
  Fetch printer spool according to the spool number informed.
• G_set_get_all_values
  Fetch values from a set.
• Rzl_sleep
  Hang the current application from 1 to 5 seconds.
• Rzl_submit
  Submit a remote report.
• Ws_execute
  Execute an external program on the presentation server.
• Ws_file_delete
  Delete file at the frontend.
• Ws_volume_get
  Get the label from a frontend device.
• Ws_msg
  Create a dialog box in which you display an one-line message.
• Popup_to_display_text
  Create a dialog box in which you display a two-line message.
• Popup_to_confirm_step
  Create a dialog box in which you make a question whether the user wishes to perform. the step.
• Popup_to_confirm_with_message
  Create a dialog box in which you inform. the user about a specific decision point during an action.
• Popup_to_confirm_with_value
  Create a dialog box in which you make a question whether the user wishes to perform. a processing step with a particular object.
• Popup_to_confirm_loss_of_data
  Create a dialog box in which you make a question whether the user wishes to perform. a processing step with loss of data.
• Popup_to_decide
  Create a dialog box in which you require the user between the two processing alternatives, or to cancel the action.
• Popup_to_decide_with_message
  Create a dialog box in which you inform. the user about a specific decision point via a diagnosis text.