Apache POI - XSSF - Dealing with checkboxes

I am working with an excel-file which contains some checkboxes.

Is it possible to somehow get the current state (checked or unchecked)?

I found a page, which describes exactly that, but it is not using XSSF, but HSSF: http://zswap.wordpress.com/2010/12/08/fetching-option-or-radio-button-worksheet-form-control-from-an-excel-file-using-poi/

How can I do that using XSSF?