NtAlertThreadByThreadIdEx - NtDoc

#ifndef _NTPSAPI_H
//
// Threads
//
#if (PHNT_MODE != PHNT_MODE_KERNEL)
#if (PHNT_VERSION >= PHNT_WINDOWS_11)

/**
 * Sends an alert to the specified thread by its thread ID, with an optional lock.
 *
 * @param ThreadId The thread ID of the thread to be alerted.
 * @param Lock An optional pointer to an SRW lock to be used during the alert.
 * @return NTSTATUS Successful or errant status.
 */
NTSYSCALLAPI
NTSTATUS
NTAPI
NtAlertThreadByThreadIdEx(
    _In_ HANDLE ThreadId,
    _In_opt_ PRTL_SRWLOCK Lock
    );

#endif
#endif
#endif
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#ifndef _NTZWAPI_H

NTSYSCALLAPI
NTSTATUS
NTAPI
ZwAlertThreadByThreadIdEx(
    _In_ HANDLE ThreadId,
    _In_opt_ PRTL_SRWLOCK Lock
    );

#endif
View code on GitHub