Hi Blqck,
I think the sample you are referring is this one:
https://code.msdn.microsoft.com/windowsapps/Simple-Communication-Sample-eac73290
Which part you get stuck? You don't know how to run the sample or you cannot understand some parts of the code?
I would not recommend you to run the app over localhost, let's say one of the app is act like server and another is act as a client, we cannot run two store app at the same time on one device.
--James
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