Sets the specified event object to the nonsignaled state
#include <WinAPIProc.au3>
_WinAPI_ResetEvent ( $hEvent )
| $hEvent | Handle to the event object. The _WinAPI_CreateEvent() function returns this handle. | 
| Success: | True. | 
| Failure: | False, call _WinAPI_GetLastError() to get extended error information. | 
The state of an event object remains nonsignaled until it is explicitly set to signaled by the _WinAPI_SetEvent() function.
This nonsignaled state blocks the execution of any threads that have specified the event object in a call to one of the _WinAPI_Wait... functions.
The _WinAPI_ResetEvent() function is used primarily for manual-reset event objects, which must be set explicitly to the nonsignaled state.
Auto-reset event objects automatically change from signaled to nonsignaled after a single waiting thread is released.
_WinAPI_CreateEvent, _WinAPI_SetEvent
Search ResetEvent in MSDN Library.
#include <WinAPIHObj.au3>
#include <WinAPIProc.au3>
Global $g_tEvents = DllStructCreate("handle Event[3];")
$g_tEvents.Event(1) = _WinAPI_CreateEvent(0, True, False)
$g_tEvents.Event(2) = _WinAPI_CreateEvent(0, True, False)
$g_tEvents.Event(3) = _WinAPI_CreateEvent(0, True, False)
HotKeySet("{ESC}", "_Exit")
AdlibRegister("_FireEvent_1", 500)
AdlibRegister("_FireEvent_2", 800)
Local $iEvent
While 1
    $iEvent = _WinAPI_WaitForMultipleObjects(3, $g_tEvents, False, 100)
    Switch $iEvent
        Case 0
            ConsoleWrite("+ First Event" & @CRLF)
            _WinAPI_ResetEvent($g_tEvents.Event(1))
        Case 1
            ConsoleWrite("> Second Event" & @CRLF)
            _WinAPI_ResetEvent($g_tEvents.Event(2))
        Case 2
            ConsoleWrite("! Exit Event" & @CRLF)
            AdlibUnRegister("_FireEvent_1")
            AdlibUnRegister("_FireEvent_2")
            _WinAPI_CloseHandle($g_tEvents.Event(1))
            _WinAPI_CloseHandle($g_tEvents.Event(2))
            _WinAPI_CloseHandle($g_tEvents.Event(3))
            ExitLoop
        Case -1 ;Error
            ExitLoop
    EndSwitch
    Sleep(10)
WEnd
Func _Exit()
    _WinAPI_SetEvent($g_tEvents.Event(3))
EndFunc   ;==>_Exit
Func _FireEvent_1()
    _WinAPI_SetEvent($g_tEvents.Event(1))
EndFunc   ;==>_FireEvent_1
Func _FireEvent_2()
    _WinAPI_SetEvent($g_tEvents.Event(2))
EndFunc   ;==>_FireEvent_2