Launch Explorer.exe from Cygwin

Working in cygwin, I often need an explorer window to my current directory or a sub-directory there of. I called this script expl.sh.

#!/bin/bash
export p=`pwd`
export pc=`cygpath -w $p/$1`
explorer.exe /root,$pc &

Once you have this the directory on your path where you keep your scripts: perhaps ~/scripts:
expl.sh
expl.sh some/sub/directory