Comment 14 for bug 449272

Gnome panel is also a dock type window that is hidden (use show hide buttons or auto-hide) but it has no problem. Is there any other (than invest and dictionary applet) example of a dock type window that is hidden rather than destroyed?

Sorry but I'm learning.How can you see if a dock type window is hidden or destroyed? Where can I find the source code of compiz (in what prog. language it is written?) ? Which way are the dock type windows defined in compiz source code?