@FILES

@FILES[filename [,-nrhsda]]:  Returns the number of files that match the 
filename, which may contain wildcards and include lists.  Returns "0" if 
no files match.  The filename must refer to a single directory; to check 
several directories, use @FILES once for each directory, and add the 
results together with @EVAL. 

The second argument is a list of file attributes.  If it is included, only 
those files matching all the specified attributes are counted.  The 
attributes are: 

        N   Normal (no attributes set) 
        R   Read-only 
        H   Hidden 
        S   System 
        D   Directory 
        A   Archive 
 
 The attributes (other than N) can be combined (for example 
 %@FILES[MYFILE,HS]).  You can prefix an attribute with - to mean 
 "everything except files with this attribute."