Winspool libraries VS System.Printing namespace

Question

I just started working on a WPF application (with .NET Core 3.1).
It has a print module implemented using Winspool through DllImport("winspool.Drv").

I have the following questions.

1. Any documentation links on how to implement Winspool in a .NET WPF project?
2. Differences between using System.Printing namespace and Winspool implementation?
3. Scenarios for using System.Printing namespace VS using Winspool libraries please
4. Are there any better alternate ways to implement print function in a WPF project?

Any help is very much appreciated.