"directory" function

[Pattarachai Lalitrojwong <lalipat@charlie.cns.iit.edu>]

Hi,

Now I'm writing a Clisp program with on DOS. I'd like to know how I can dir 
with wildcards, like (directory "a*.*") ?  Another question is the result 
from DIRECTORY function contains only files, how can I get subdirectories 
if it has?

Thanks,
Pat.