How to increment a variable on button press

How to increment a variable on button press

Hello,
Another simple question.
For testing purposes, I want to be able to toggle a boolean value via a button.
What are the steps needed to achieve this?
I have created a variable and a button and a text box that displays the value.
Cheers,
mat

This is a migrated post! Originally posted on 24.09.2008 by user matholton. Please be aware that information can be outdated.