Top 20 NuGet user32 Packages

Dapplo.Windows.User32 provides logic of the Windows User32 API
A managed wrapper over SetWinEventHook and UnhookWinEvent.
Functions for using User32, Kernel32, RawInput and Devices etc.
Managed wrapper for native libraries
A collection of libraries intended to contain all P/Invoke method signatures for popular operating systems.
P/Invoke like a boss
Native Windows API interop declarations
Ccr.WinCore package for Windows Core-level helpers, PInvoke, Shell32, and User32 libraries. Contains constructs used to interact directly with the WinAPI.
Windows interop