Duality.Editor.InputEventMessageFilter.PreFilterMessage C# (CSharp) Method

        public bool PreFilterMessage(ref Message m)
        {
            if (m.Msg == (int)WindowsMessages.WM_MOUSEMOVE)
            {
                if (this.MouseMove != null) this.MouseMove(this, EventArgs.Empty);
            }
            else if (m.Msg == (int)WindowsMessages.WM_MOUSELEAVE)
            {
                if (this.MouseLeave != null) this.MouseLeave(this, EventArgs.Empty);
            }
            else if (m.Msg == (int)WindowsMessages.WM_LBUTTONUP)
            {
                if (this.MouseUp != null) this.MouseUp(this, EventArgs.Empty);
            }
            else if (m.Msg == (int)WindowsMessages.WM_RBUTTONUP)
            {
                if (this.MouseUp != null) this.MouseUp(this, EventArgs.Empty);
            }
            else if (m.Msg == (int)WindowsMessages.WM_MOUSEWHEEL)
            {
                if (this.MouseWheel != null) this.MouseWheel(this, EventArgs.Empty);
            }
            else if (m.Msg == (int)WindowsMessages.WM_KEYDOWN)
            {
                if (this.KeyDown != null)
                {
                    KeyEventArgs args = new KeyEventArgs((Keys)m.WParam.ToInt32());
                    this.KeyDown(this, args);
                    return args.Handled;
                }
            }
            return false;
        }