1. Have a Wii U Pro (It must be wireless) 2. have the MayFlash Wireless Wii U Pro Controller To USB Adapter

Do that by.... Pressing the black button on the addapter titled SYNC. Also press the red button at the back of the controller. Once done the controller's 1,2,3,4 player thingy stops blinking it should be done connecting.

Then go in-game and go to options, then the mouse tab, then click enable the gamepad. (your done) .....

The adapter is a usb so PLUG IT IN to the computer/laptop/whatever computer you have. Also this is the link for the adapter http://www.ebay.com/itm/Hot-1x-MayFlash-Wireless-Controller-Adapter-Turbo-For-Wii-U-Pro-To-USB-PC-White/231489823162?_trksid=p2054897.c100204.m3164&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%26asc%3D20140407115239%26meid%3Dd4fa8f0c3fbb49859340e41a9074f881%26pid%3D100204%26rk%3D2%26rkt%3D30%26sd%3D321458903457 it's the cheapest one I found. Plus, It's new.