Data can be permanent (persists across reboots), persistent (in memory), or temporary (process-specific). Why NtQueryWnfStateData is "Better"
auto pNtQueryWnfStateData = reinterpret_cast<decltype(&::NtQueryWnfStateData)>( GetProcAddress(hNtdll, "NtQueryWnfStateData") );
If you are encountering errors or crashes related to ntdll.dll while using these functions, standard system repairs are recommended: ntquerywnfstatedata ntdlldll better
Microsoft may change the behavior, parameters, or even remove the export in a future update. Your code could break after a Windows patch.
The most effective way to work with NtQueryWnfStateData is to create a thin wrapper that handles the dynamic buffer sizing automatically, deals with missing states as normal conditions rather than errors, and respects the minimum Windows versions that support WNF. Data can be permanent (persists across reboots), persistent
NtQueryWnfStateData can be used in various scenarios, such as:
Specifically, many users have reported missing entry points on Windows 7: The most effective way to work with NtQueryWnfStateData
typedef struct _WNF_STATE_NAME ULONG Data[2]; WNF_STATE_NAME; typedef ULONG WNF_CHANGE_STAMP;
The actual function signature for NtQueryWnfStateData reveals its intended usage: