The minimum requirement for working with DDE in ABL is familiarity with the way your DDE server applications provide data and services to DDE clients. Each server application has its own way of naming data items and groups of data items in its own environment. It also usually provides a set of commands that you can execute with DDE that direct the server to perform server-supported application actions (for example, to create documents or spreadsheets). For information on using DDE with each application, see the application documentation.