The FlexGrid has extensive built-in accessibility support.
But there are situations where you may want to extend that
and provide additional support that is specific to your
application or user base.
The AcessibilityExtender shows how you can easily extend
accessibility support in two ways:
By allowing users to resize columns using the keyboard
This is done by handling the keydown event and changing
the width property on selected columns.
By providing an "alert" method that changes the content
of an invisible element with role "alert". In this sample,
the alert method is used to announce grid actions such as
sorting and filtering
(to actually hear the announcements, you must enable an
assistive tool such as Chrome Vox, Narrator, or JAWS).