Triggering Cancel can be configured by a Shortcut for the manager that will close the popup:
Note that this will affect all RadWindows opened from this manager. Also, the callback function will not receive arguments in this case, while it usually will (false for RadConfirm and null for RadPrompt).
The other, more complex option is to create your own keypress or keydown handlers for the body element that will do the necessary work. This can also be used for triggering the OK button. Details on the case and a sample script are available in this thread
. You can use the code as base and extend it further to match your needs.
If you want to get updates on new releases, tips and tricks and sneak peeks at our product labs directly from the developers working on the RadControls for ASP.NET AJAX, subscribe to the blog feed