We have discussed the ability to assign an Windows Mobile application we have created to a device's hardware button. Once with our day two application, Bluetooth Manager, and once again with our day eight application, Rotate Me.

By default my device's buttons are configured as follows: "Button 1" starts "Internet Explorer", "Button 2" starts "Messaging", "Button 3" starts the "<Start Menu>", "Button 4" starts "<OK/Close>", and finally "Button 5" starts the "<Camera>". If you look at the screenshots below, you'll noticed I changed "Button 2" to start the "Rotate Me" application instead. This is the "as good as it gets" way to start an application; doesn't get better than one button press access.

Just in case everyone isn't aware of the feature in Windows Mobile, I've posted the steps here:

First click the "<Start Menu>", now click on "Settings" menu item, next click on the "Buttons" icon under the "Personal" tab, finally select a button and assign it a program. It's that easy.