Thanks a lot, gemisigo
From those tools I mentioned, Winspector Spy seems to be more advanced but the amount of messages was really high and it was difficult to see their exact meanings.
So, I gave in...
I do like you said and I try to find ID list of concret app.
btw.
I thought maybe freeware Deviare Message Spy wll help but they (authors) send this tool only to companies. (weird philosophy :/ )
>>> Screen: http://www.codeproject.com/KB/winsdk/messagespy/DevMsgSpy.png
On the screen it looks like this tool is able to get message ID but propably works in the same way like other app's.
So, propably again only wasting of time... ;)
Anyway...., thanks