Question

I know you can call Windows Services from a Windows store app as described here, so I was wondering if it would be possible to install a custom one packaged with a Windows store app.

Thanks in advance.

Answer 1

Did you mean a WCF (web) service vs. a Windows Service (the latter isn’t addressed in the link you referenced). Regardless, your application will not pass certification if it requires a loopback connection to a service hosted on the same machine.

You can set this up for testing, but note:

Enable loopback for network access

Network communications using an IP loopback address cannot be used for
interprocess communication (between two different apps) since this is
restricted by network isolation. Network communication using an IP
loopback address is allowed within an app within the same process for
communication purposes.

A developer may want to use loopback for testing or debugging
purposes, even though that capability will not be available for
customers. For example, an app may want to download data from a web
service. For development purposes, the developer wants to test the app
on a single computer that is configured with the web service locally
on 127.0.0.1.

Warning Loopback is only permitted for development purposes. Usage by
apps installed outside of Visual Studio is not permitted.