1. Press CTRL+SHIFT+P to start or stop the counter (these hotkeys should work even if it's running in the background). You will hear a beep when it starts and another one when it stops.
2. Besides your average APM, you will be able to see in a chart your instant APM during the whole game.
3. It has a separate counter for your keyboard and mouse actions.
4. It calculates your APM automatically when you stop the counter.
To run this application, unzip the files in any folder of your computer and double-click the file ActionCounter.exe. If you don’t have the .NET Framework 1.1 in your machine, you need to install it. It’s available for free at http://www.microsoft.com/downloads/details.aspx?FamilyID=262d25e3-f589-4842-8157-034d1e7cf3a3&displaylang=en. You should also install the service pack 1 available at http://www.microsoft.com/downloads/details.aspx?familyid=A8F5654F-088E-40B2-BBDB-A83353618B38&displaylang=en.