Determines if a file name refers to a directory
(vl-file-directory-p filename)
Arguments
A string containing a file name. If you do not specify a full path name, vl-file-directory-p searches only the AutoCAD default drawing directory.
Return Values
T, if filename is the name of a directory; nil if it is not.
Examples
_$ (vl-file-directory-p "sample")
T
_$ (vl-file-directory-p "yinyang")
nil
_$ (vl-file-directory-p "c:/My Documents")
T
_$ (vl-file-directory-p "c:/My Documents/visuallisp/yinyang.lsp")
nil
