While NtQueryWnfStateData is undocumented by Microsoft and subject to change between OS versions, it offers distinct advantages for specialized tasks:
The function signature, often found in internal headers, looks similar to this: ntquerywnfstatedata ntdlldll better
While querying Focus Assist is a harmless example, the internal nature of NtQueryWnfStateData and WNF itself has made them a subject of intense interest in the security community. The ability to read and manipulate kernel state from user mode is a powerful primitive. Still, the impression lingered
What specific or system data are you attempting to query? NTSTATUS status = NtQueryWnfStateData( targetState
Still, the impression lingered. It wasn’t just about software; it was about responsibility — the human insistence that “better” is worth carving into the machine. In the end, the message mattered less for its literal meaning than for its demand: notice this, mend this, do better.
NTSTATUS status = NtQueryWnfStateData( targetState, NULL, NULL, &changeStamp, buffer, &bufferSize );
typedef struct _WNF_TYPE_ID GUID TypeId; WNF_TYPE_ID, *PWNF_TYPE_ID; typedef LONG NTSTATUS; typedef NTSTATUS(NTAPI* PFN_NtQueryWnfStateData)( _In_ PULONG64 StateName, _In_opt_ PWNF_TYPE_ID TypeId, _In_opt_ PVOID ExplicitScope, _Out_ PULONG ChangeSequenceNumber, _Out_writes_bytes_to_opt_(*BufferLength, *BufferLength) PVOID Buffer, _Inout_ PULONG BufferLength ); Use code with caution. Fetching the Function Pointer Dynamically