[GUI] wxwindows and native look and feel

I don't know if this is true, but my professor of "Graphical interfaces" told me some month ago that wxwindows is not really "native look and feel" on windows, since for example the "file open" dialog is not native. At the same time, wxwindows has its own format for resources, and the "file open" dialog is not native under gnome (even if it's better than the gnome one). Anyone wishing to clarify? Vincenzo PS: Maybe the wxwindows experience should tell us that what we are looking for is impossible to reach?