CreateWaitableTimer

[DllImport("Kernel32.dll", SetLastError = true)][return: MarshalAs(UnmanagedType.SafeHandle)]
public static extern SafeWaitHandle CreateWaitableTimer(
   IntPtr lpTimerAttributes,
   [MarshalAs(UnmanagedType.Bool)] bool bManualReset,
   string lpTimerName
);

Microsoft documentation: Link