Decrement a progress bar on button click?
<p>I'm trying to include a horizontal progress bar in my application. The idea is that when a user clicks a button the bar decrements by 1/10th of its length. Then when its 'empty' clicking a second button would set it back to 10/10.</p>

<p>Any ideas on how to do this? I've performed a search but most tutorials appear to deal with loading files etc and not adjusting the bar by a button click.</p>

<p>Thanks so much.</p>
