Excel VBA add handler to every checkbox in form

I have an excel form with a large number of checkboxes that are added at runtime. I would like to add a handler to each one of those checkboxes that will run when the value is changed. I know in other versions of Visual Basic I would use AddHandler, but that doesn't work in Excel VBA.

I looked here http://ift.tt/1BBxENo (as well as several places on SO) but couldn't find a working solution. Does anyone know the trick?