NtSetLowWaitHighThread

Set → NTSTATUS

NtSetLowWaitHighThread is a Windows NT kernel system call, in the Set category, returning NTSTATUS. Its syscall number is not the same on every Windows release: across the 11 version-and-architecture pairs recorded here it takes 5 distinct values, from 0x0095 to 0x00AB.

The number is an index into the system service table of one particular build, not a stable identifier, so it is not portable between Windows versions. The table below gives the value recorded for each.

Numbers across OS versions (11)

OS VersionArchitectureNumber
Windows NT 3.x 3.1 x86 0x0095 (149)
Windows NT 3.x 3.5 x86 0x009C (156)
Windows NT 3.x 3.51 x86 0x00A3 (163)
Windows NT 4.0 SP0 x86 0x00AA (170)
Windows NT 4.0 SP1 x86 0x00AA (170)
Windows NT 4.0 SP2 x86 0x00AB (171)
Windows NT 4.0 SP3 x86 0x00AB (171)
Windows NT 4.0 SP3 TSE x86 0x00AB (171)
Windows NT 4.0 SP4 x86 0x00AB (171)
Windows NT 4.0 SP5 x86 0x00AB (171)
Windows NT 4.0 SP6 x86 0x00AB (171)