According " Handle pointer input " , there is a "PointerRoutedEventArgs e" can get a point object.
PointerPoint ptrPt = e.GetCurrentPoint(Target);
https://docs.microsoft.com/en-us/windows/uwp/design/input/handle-pointer-input#pointer-event-example
But I want to get the PointerPoint under the background app. I can't find useful information about such method / function to get the "PointerRoutedEventArgs" trigger for background app.
How could I get it ?