How to stop Firebird SuperClassic (run as application) in Win 7?

I run Firebird 2.5.3 SuperClassic as application in Windows 7 64-bit with this command:

fb_inet_server -a -m

Now, how can I stop/shutdown it from command prompt? I know that I could right-click its icon and choose Shutdown, but this is not what I'm looking for.

Thanks in advance.