You can enable a BlackBerry® device application that uses custom UI components to send information to an assistive technology application by using the classes and interfaces in the net.rim.device.api.ui.accessibility package. When a custom UI component changes, an assistive technology application receives a notification about the change and can retrieve more information about the change from the custom UI component.

For example, if a BlackBerry device application uses a custom class called myTextField that extends the TextField class, when a BlackBerry device user changes the text in a myTextField instance, an assistive technology application receives notification of the change and can retrieve information such as the text that the user selects or changes.