if m32 == 0 {
			print("runtime: LoadLibraryExW failed; errno=", getlasterror(), "\n")
			throw("winmm.dll not found")
		}
		_timeBeginPeriod = windowsFindfunc(m32, []byte("timeBeginPeriod\000"))
		_timeEndPeriod = windowsFindfunc(m32, []byte("timeEndPeriod\000"))
		if _timeBeginPeriod == nil || _timeEndPeriod == nil {
			print("runtime: GetProcAddress failed; errno=", getlasterror(), "\n")
			throw("timeBegin/EndPeriod not found")
		}
	}