ScreenToGif.Windows.Recorder.MouseHookTarget C# (CSharp) Méthode

        private void MouseHookTarget(object sender, CustomMouseEventArgs keyEventArgs)
        {
            _recordClicked = keyEventArgs.Button == MouseButton.Left && keyEventArgs.State == MouseButtonState.Pressed;
            _posCursor = new System.Windows.Point(keyEventArgs.PosX, keyEventArgs.PosY);

            if (!IsMouseCaptured || Mouse.Captured == null)
                return;

            #region Get Handle and Window Rect

            var handle = Native.WindowFromPoint(keyEventArgs.PosX, keyEventArgs.PosY);
            var scale = this.Scale();

            if (_lastHandle != handle)
            {
                if (_lastHandle != IntPtr.Zero)
                    Native.DrawFrame(_lastHandle, scale);

                _lastHandle = handle;
                Native.DrawFrame(handle, scale);
            }

            Native.RECT rect;
            if (!Native.GetWindowRect(handle, out rect)) return;

            #endregion

            if (keyEventArgs.State == MouseButtonState.Pressed)
                return;

            #region Mouse Up

            Cursor = Cursors.Arrow;

            try
            {
                #region Try to get the process

                Process target = null;// Process.GetProcesses().FirstOrDefault(p => p.Handle == handle);

                var processes = Process.GetProcesses();
                foreach (var proc in processes)
                {
                    try
                    {
                        if (proc.MainWindowHandle != IntPtr.Zero && proc.HandleCount > 0 && (proc.Handle == handle || proc.MainWindowHandle == handle))
                        {
                            target = proc;
                            break;
                        }
                    }
                    catch (Exception)
                    { }
                }

                #endregion

                if (target != null && target.ProcessName == "ScreenToGif") return;

                //Clear up the selected window frame.
                Native.DrawFrame(handle, scale);
                _lastHandle = IntPtr.Zero;

                #region Values

                var top = (rect.Top / scale) - Constants.TopOffset;
                var left = (rect.Left / scale) - Constants.LeftOffset;
                var height = ((rect.Bottom - rect.Top + 1) / scale) + Constants.TopOffset + Constants.BottomOffset;
                var width = ((rect.Right - rect.Left + 1) / scale) + Constants.LeftOffset + Constants.RightOffset;

                #endregion

                #region Validate

                //TODO: Validate screensize...
                if (top < 0)
                    top = 0 - 1;
                if (left < 0)
                    left = 0 - 1;
                if (SystemInformation.VirtualScreen.Height < height + top)
                    height = SystemInformation.VirtualScreen.Height - top;
                if (SystemInformation.VirtualScreen.Width < width + left)
                    width = SystemInformation.VirtualScreen.Width - left;

                #endregion

                Top = top;
                Left = left;
                Height = height;
                Width = width;
            }
            catch (Exception ex)
            {
                LogWriter.Log(ex, "Error • Snap To Window");
            }
            finally
            {
                ReleaseMouseCapture();
            }

            #endregion
        }