The target element is a DOM-element that invokes a hint window pointing to this element in response to user interaction (hovering the mouse pointer over it, clicking it, etc.) if the callout (ASPxHint.ShowCallout) is enabled.
To specify a target element for a hint, use one of the following ways:
Use the Register() client method to register a hint's functionality with the specified settings (target element, trigger action, content, etc.). The method's first argument is a target element CSS selector that specifies for which UI elements on a web page a hint displays.
Note that a call to the Register() method does not immediately invoke a hint window. This method just registers a hint within a web page and allows end-users to invoke the hint (using the specified trigger action over the selected target element). To display a hint immediately, use the Show() method.
Setting X/Y Coordinates
To display a hint at precise X/Y coordinates without targeting a UI element, use one of the following ways: