This widget intend to replace the RichWidgets List_BulkSelect in situations when you want to provide its functionality in tables with more than one column with check boxes.

It works like the List_BulkSelect, with an extra parameter: ClassControl.

This is the CSS class that will define which Check Box widgets will be controlled by this instance of the Advanced Bulk Selection

Just add this same CSS class to the check box and it will work upon them.