#ifndef _NTPSAPI_H
//
// Threads
//
#if (PHNT_MODE != PHNT_MODE_KERNEL)
/**
 * Suspends the specified thread.
 *
 * \param ThreadHandle A handle to the thread to be suspended.
 * \param PreviousSuspendCount Optional. A pointer to a variable that receives the thread's previous suspend count.
 * \return NTSTATUS Successful or errant status.
 */
NTSYSCALLAPI
NTSTATUS
NTAPI
NtSuspendThread(
    _In_ HANDLE ThreadHandle,
    _Out_opt_ PULONG PreviousSuspendCount
    );
View code on GitHub#ifndef _NTZWAPI_H
NTSYSCALLAPI
NTSTATUS
NTAPI
ZwSuspendThread(
    _In_ HANDLE ThreadHandle,
    _Out_opt_ PULONG PreviousSuspendCount
    );
View code on GitHubSuspends a thread.
ThreadHandle - a handle to a thread granting THREAD_SUSPEND_RESUME access.PreviousSuspendCount - an optional pointer to a variable that receives the previous value of the suspension counter of the thread.Suspend count for ThreadHandle thread before function call.