How to check where Debug output is coming from?

Question

I was debugging my windows service application through Debug messages.

To view debug message, I was using DebugView (from SysInternals). However I am getting flooded with following Keyboard output on the output (which I found out how to filter out).

Is there a way to find out which application is responsible for generating a debug output? And is anyone familiar with the message shown below?

Answer (Thanks heavyd)
Found the culprit responsible for that verbose output, and slowing down my machine considerably. Now I need to find out where this guy came from.

UPDATE]
OKay, this is a driver for Lenovo Ultra Nav keyboard. That's it. This guy is out...

Answer 1

I am not familiar with that particular message, however in the Options menu you can select "Win32 PIDs". The PID then should show up in the debug print in brakets like this:

[PID] MakeCode = 2d, vkCode = 58, State = 80

You can then use ProcessExplorer to determine the application by its proccess ID.