Ntdll.dll — Ntquerywnfstatedata

: Windows components use this to check system-wide settings like WNF_SHEL_AIRPLANE_MODE .

Disclaimer: Windows, NTDLL, and WNF are trademarks of Microsoft Corporation. The information provided is for educational and research purposes only. Do not rely on undocumented functions in production software.

It can return information about system status, such as battery levels, network connectivity, or hardware events (camera, microphone). Why you might see it ntquerywnfstatedata ntdll.dll

If you are seeing this function name in a "review" context—such as a security scan or an error report—it typically refers to one of three things: Viewing online file analysis results for 'twinui.dll'

Use the official RtlQueryWnfStateData (also undocumented, but exported and slightly more stable) or trace system processes with API Monitor. : Windows components use this to check system-wide

00000000`774a2f40 : ntdll!NtQueryWnfStateData 00000000`774a2e1f : ntdll!RtlQueryWnfStateData+0x2a

| Syscall | Similarity / Contrast | |---------|------------------------| | NtQuerySystemInformation | Retrieves broad system info; WNF is for small, topic-specific state data. | | NtQueryVolumeInformationFile | File/volume info; WNF has no file backing. | | NtQueryWnfStateNameInformation | Metadata about a WNF topic (e.g., creator, subscribers). | | NtQueryWnfStateData | retrieval. | Do not rely on undocumented functions in production software

Retrieve information about hardware status (battery, WiFi, Bluetooth) or software events.

And something else was still querying it.

One such function that has garnered attention in the cybersecurity and reverse engineering communities is NtQueryWnfStateData . While not part of the official Windows SDK documentation, this function plays a pivotal role in the Windows Notification Facility (WNF), a mechanism that facilitates communication between components of the OS.