The following are the Input/Output data types:

• Dialog: Supports the definition of a simple UI window without the use of a Page object. Typically, the Dialog windows are used to communicate processing progress or to allow a brief user response to a go/no-go question, though this latter use could result in bad performance due to locking. There are other user communication tools as well, but they do not use a Dialog type data item.
• InStream and OutStream: These allow reading from and writing to external files, BLOBS, and objects of the Automation and .Net data types.