How to use *just* the current folder name in a variable

I am in a subfolder. Oh, let's call it: \\mycomputer\c\myfolder\mysubfolder.

I want to grab just the subfolder name to set as a variable. In other words, the stuff to the right of the rightmost backslash.

%_CWD comes close, but I don't want the full directory structure, just "mysubfolder".

Advice on how to do that? Split off the directory structure, just return the folder name?

Thanks.