ghost specifiers...

Ok, I tried to find info on these, but couldn't decipher the code in specifier.c and there seems to be no code that actually uses this. The only place I could find was in scrollbar-msw.c, but that wasn't much help. Can any specifier have ghost specifications added to it? How would I go about making the foreground and background of a face be tied to a ghost specifier that would look up the right thing dynamically in the window system? Specifiers have always made me a bit queasy when you hit the big magic. -Bill P.