Essentially: no. The permissions system in Windows is very different 
from that of Unix. The CRT attempts to mimic it, but for things like 
read-onlyness, it does so by setting the (old-style DOS) attributes. 
These are only just meaningful for files, and are meaningless for 
directories. (Or, strictly, have a different meaning since ISTR the 
Explorer shell uses the readonly bit to indicate that a directory has 
some special significance).