dir=$(echo $PATH | ls | grep '^file_name*' )
In MS Windows it works like this:
1 - Hold the "Shift" key, right-click the folder containing the files
and select "Open Command Window Here."
2 - Type "dir /b > filenames.txt" (without quotation marks) in the
Command Window. ...
3 - Inside the folder there should now be a file filenames.txt
containing names of all the files etc.