Ajax[Sample|Source|Documentation] Anchor1 Anchor2 Anchor3 Anchor4 Description This sample shows how to set tooltip content via AJAX. The following properties/events are used in this sample. EnableCallBackMode OnOnAjaxUpdate This sample sets the EnableCallBackMode property to True to enable the callback to populate content. Then the OnOnAjaxUpdate event is used to set tooltip's content in server-side code.