[FreeNX-kNX] detecting nxproxy managed windows

[Antoine Martin]

Hi,

Is there anything that would allow me to distinguish windows created by
nxproxy from other windows on the desktop?
It seems that the _NET_WM_PID property refers to the pid of the process
running on the server and not of any process found on the client. But
apart from that, I fail to see any properties that would allow me to
recognize these windows.

Thanks
Antoine