NtSetLowWaitHighEventPair - NtDoc

Native API online documentation, based on the System Informer (formerly Process Hacker) phnt headers
#ifndef _NTEXAPI_H
#if (PHNT_MODE != PHNT_MODE_KERNEL)

/**
 * The NtSetLowWaitHighEventPair routine sets the low event in an event pair to the signaled state and waits for the high event to be set to the signaled state.
 *
 * @param EventPairHandle A handle to the event pair object.
 * @return NTSTATUS Successful or errant status.
 */
NTSYSCALLAPI
NTSTATUS
NTAPI
NtSetLowWaitHighEventPair(
    _In_ HANDLE EventPairHandle
    );

#endif
#endif

View code on GitHub
#ifndef _NTZWAPI_H

NTSYSCALLAPI
NTSTATUS
NTAPI
ZwSetLowWaitHighEventPair(
    _In_ HANDLE EventPairHandle
    );

#endif

View code on GitHub

Function set signalled state to LOW event and wait until HIGH event will be signaled.

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See also