Most of you know this but for new people to BlackBerry it may help.  

There is an extra button on the side of your BlackBerry that can be assigned to anything you want.  

I have mine hooked up to our Screen Grabber app because I take many screen grabs during the day.  Some people like to assign it the camera, or our free flashlight app.  

Here is a quick video that will show you how to easily assign that button to the function/app of your choice.  

Let me know if you have any problems getting it to work.