API documentation for the Rust `NtQueryWnfStateData` fn in crate `ntapi`. wnf - Rust - Docs.rs
WNF updates are kernel-pushed. Polling a registry key or waiting for a broadcast message is slow and wasteful. NtQueryWnfStateData reads the current state directly from the kernel’s WNF database. ntquerywnfstatedata ntdlldll better
#include <Windows.h> #include <ntstatus.h> API documentation for the Rust `NtQueryWnfStateData` fn in
The Windows Notification Facility, accessed through NtQueryWnfStateData in ntdll.dll , represents a way for low-level system monitoring, debugging, and state inspection. It offers speed, low overhead, and access to otherwise hidden kernel-managed states. The Windows Notification Facility
This function allows your application to receive notifications precisely when data changes, eliminating the need for busy-waiting loops that waste CPU cycles and battery life. The subscription handle must be closed with NtClose when monitoring is no longer required.