# AccessibilityExtender

The AccessibilityExtender class adds extra accessibility features to the FlexGrid control.

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 AccessibilityExtender shows how you can easily extend accessibility support in two ways:

1. By allowing users to resize columns using the keyboard (alt+left/right keys). This is done by handling the keydown event and changing the width property on selected columns.
2. 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).