How to create a valid PrintSupportSettingUISession object?
I am working in my Print Support Application program according to https://learn.microsoft.com/en-us/windows-hardware/drivers/devapps/print-support-app-design-guide.
But it doesn't work becasuse OnActivated(IActivatedEventArgs args) function is not called. I guess PrintSupportSettingsUISession maybe not created correctly. Certainly I defined an extension point according to design guide by keywork <printsupport:Extension Category="windows.printSupportSettingsUI" in Package.appxmanifest file.
When I try to find out why, I note that uap4:Extension is required in Remarks section in this paper:
Is it not a missing? It seems uap4:Extension has not datatype of windows.printSupportSettingsUI in its Category.