Internet Explorer new window .bat file

Hello.

I need a bat file that opens a NEW Internet explorer window, and open a specific site - and then close the dos prombt again.

I already have one Internet explorer opened, so i need it to be opened in a new Ie - not a new tab

so far ive created this

@echo off
"%PROGRAMFILES%\Internet Explorer\IEXPLORE.EXE" http://www.microsoft.com
exit


And it works, but the "exit" dosent exit the black dos prompt behind.

What am i doing wrong?