CSharp___DllImport.Phone.KeyboardHook.StartHook C# (CSharp) Метод

            public static void StartHook(PhysicalKeys[] listenFor)
            {
                if (listenFor == null || listenFor.Length == 0)
                {
                    throw new ArgumentException("listenFor; null or 0 length");
                }

                m_listenFor = listenFor.Select(enu => (int)enu).ToArray();

                if (!isRunninghook)
                {
                    isRunninghook = true;

                    hookThread = new System.Threading.Timer((callback) =>
                    {
                        while (true)
                        {
                            for (int i = 0; i < m_listenFor.Length; i++)
                            {
                                if (DllImportCaller.lib.GetAsyncKeyState7(m_listenFor[i]) != 0) //OPTIMIZE, SO FEW CALLS POSSIBLE; Phone.KeyboardHook.IsKeyDown(m_listenFor[i]))
                                {
                                    if (OnKeyDown != null)
                                    {
                                        OnKeyDown(null, (PhysicalKeys)m_listenFor[i]);
                                    }
                                }
                            }

                            System.Threading.Thread.Sleep(500);
                        }

                    }, null, 0, System.Threading.Timeout.Infinite);
                }
            }
            public static void StopHook()