install VSCode
install stack
right click this folder and click "Open with Code" or open from VSCode menu file > open.
if you did not install extention for this project you can find messages top of VSCode window for recommend extentions and install them.
open /app/Main.hs on VSCode and run compile command with runner ctl+shift+r.
I only trace this article.
http://azaika.hateblo.jp/entry/2015/12/19/151554
I change runhaskell.bat to use stack runhaskell.
this bat file only do runhaskell x.hs!
it's amazing!!
haskell sample is written in here
http://qiita.com/7shi/items/145f1234f8ec2af923ef
enjoy haskell!