FEPI key stroke and screen-image applications

These topics cover the key stroke and screen-image data interfaces for FEPI applications.

The examples given here are confined to simple conversational applications. However, you can use this data interface whatever the application structure. See FEPI application design for further possibilities together with full details of conversations, error handling, and system considerations.

The key stroke and screen-image data interface is suitable for a wide range of applications, and is simpler to use than the alternative data stream interface. However, there are certain types of application for which you cannot use screen-image data. For more details, see FEPI data stream applications.

You can send both key stroke and screen-image data in the same conversation. The inbound data format is the same for both: a screen-image, that you can also access field-by-field.

You must have general knowledge of data communication and protocols.