NtSetTimerEx - 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 NtSetTimerEx routine sets extended information for a timer object.
 *
 * \param TimerHandle A handle to the timer object.
 * \param TimerSetInformationClass The class of information to set.
 * \param TimerSetInformation A pointer to a buffer that contains the information to set.
 * \param TimerSetInformationLength The size of the buffer, in bytes.
 * \return NTSTATUS Successful or errant status.
 */
NTSYSCALLAPI
NTSTATUS
NTAPI
NtSetTimerEx(
    _In_ HANDLE TimerHandle,
    _In_ TIMER_SET_INFORMATION_CLASS TimerSetInformationClass,
    _Inout_updates_bytes_opt_(TimerSetInformationLength) PVOID TimerSetInformation,
    _In_ ULONG TimerSetInformationLength
    );

#endif
#endif

View code on GitHub
#ifndef _NTZWAPI_H

NTSYSCALLAPI
NTSTATUS
NTAPI
ZwSetTimerEx(
    _In_ HANDLE TimerHandle,
    _In_ TIMER_SET_INFORMATION_CLASS TimerSetInformationClass,
    _Inout_updates_bytes_opt_(TimerSetInformationLength) PVOID TimerSetInformation,
    _In_ ULONG TimerSetInformationLength
    );

#endif

View code on GitHub

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