Add to right click application menu in taskbar in .NET

private const int WMTaskbarRClick = 0x0313;
protected override void WndProc(ref Message m)
    {
        switch (m.Msg)
        {
            case WMTaskbarRClick:
                {
                    // Show your own context menu here, i do it like this
                    // there's a context menu present on my main form so i use it

                    MessageBox.Show("I see that.");

                    break;
                }
            default:
                {
                    base.WndProc(ref m);
                    break;
                }
        }
    }