Button click increments Enum list of numbers or number itself at Form level

[jacowanjr]

I am trying to have several Buttons at the form entry level that when click will increment in value (essentially Count). I see that with Enum you can have a Button type, but what I want is a Single button. Is there a way to start that button at 0 and have it increment by 1 when clicked and max out at 20?

Thanks!