# Package org.eclipse.ui.swt

Application programming interfaces for interaction with and extension of the Eclipse Platform User Interface.

See: Description

Interface Summary
IFocusService: Tracks focusGained and focusLost events for a Control registered with this service, and provides the control and its registered ID as variables to the application evaluation context for evaluation by the various services.

## Package org.eclipse.ui.swt Description

Application programming interfaces for interaction with and extension of the Eclipse Platform User Interface.

## Package Specification

This package provides API so an in-focus control can participate in the Commands and Handlers framework.