SpinButton_Change when Date
 

I have a textfield in a userform in which the user shall enter a date
(YYYY-MM-DD). I would like to have a spinbutton next to the textfield that
changes the date in the textfield if pressed. I am however ignorant
concerning how to do this. Does it work with dates? I have not defined the
date in the textfield as date but as string. Is this a propbelm?