I'm making a Universal Windows App designed for entertainment purposes and one of its tasks is to run a locally installed game.
I've done all the configurations of the .appxmanifest to run a fullTrustProcess and placed the .exe in the /Assets folder in order for it to be accessible.
But once I try to run the .exe through the App with
await FullTrustProcessLauncher.LaunchFullTrustProcessForCurrentAppAsync();
I get this error message: Error! Failed to open InvokerPRAID: with errno 22
It's really strange since it doesn't appear to throw this error with every .exe I try to run.
The problem is I don't know what this error means and I can't seem to find information on it anywhere.
If anyone can shed some light on the matter I'd be very grateful.
With the FullTrustProcoessLauncher you can only launch an EXE that is in your package, not an arbitrary game on the system. If this is your goal then you can include a simple EXE in your package that you launch via FullTrustProcessLauncher, which will then in turn launch your game (via Process.Start or ShellExecute). See also my blog post on this topic: https://stefanwick.com/2018/04/06/uwp-with-desktop-extension-part-2/
The "/InvokerPRAID" parameter is passed by FullTrustProcessLauncher to the EXE and indicates the ID of the app that has triggered the launch.
This ID is specified in the appxmanifest.xml file:
<Application ID="[PRAID]" ...>
Btw, PRAID stands for "package relative app id".