It can be convenient to use an external event server object to handle all of the INVOICES events. You get the advantages of third-party tools such as Microsoft Visual Basic or Borland’s Delphi, which offer features like advanced window and dialog handling, database support, advanced programming language capabilities, and debugging in a truly integrated development environment. A more efficient way is to register the event server as a plug-in, and subscribe to the necessary events.
To use an external event server: