Create a PSA app with WindowsAPP SDK

[nitish14s]

I am trying to create a PSA app using WindowsAPPSDK (WinUI3). I have created it as a multiinstancing app and updated the Package.AppManifest of the app

<printsupport:Extension Category="windows.printSupportSettingsUI" EntryPoint="$targetentrypoint$"/>

But when while opening from a IPP enabled printer to open this app on clicking the Printer Preferences, app is crashing with
System.Runtime.InteropServices.COMException

[jonwis]

@mziller can you assist or route?

@nitish14s can you file a Feedback Hub item and use the "record" option to collect a trace of how your app is being launched? What is the callstack reported by VS of the COMException? (Feel free to anonymize your DLL names of course.)

[nitish14s]

Posted as an issue. Please follow up on #4304

[mziller]

Hardware Support Apps are intended for hardware vendors to be able to extend functionality of their devices. They're not a general extensibility mechanism for end users to add customizations. Printer vendors should reach out to Microsoft directly for assistance in developing PSAs