@ stub RtlCopyExtendedContext
@ stdcall RtlGetEnabledExtendedFeatures(int64) ntdll.RtlGetEnabledExtendedFeatures
@ stdcall RtlGetExtendedContextLength(long ptr) ntdll.RtlGetExtendedContextLength
@ stub RtlGetExtendedFeaturesMask
@ stdcall RtlInitializeExtendedContext(ptr long ptr) ntdll.RtlInitializeExtendedContext
@ stub RtlLocateExtendedFeature
@ stub RtlLocateLegacyContext
@ stub RtlSetExtendedFeaturesMask