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        protected override void WndProc(ref Message m)
        {
            switch (m.Msg)
            {
                case Hotkey.WM_HOTKEY_MSG_ID:
                    switch ((int)m.WParam)
                    {
                        case 0:
                            if (this.WindowState == FormWindowState.Normal)
                            {
                                this.WindowState = FormWindowState.Minimized;
                                this.ShowInTaskbar = false;
                                this.ni_Icon.Visible = true;
                            }

                            else
                            {
                                this.ShowInTaskbar = true;
                                this.Show();
                                this.ni_Icon.Visible = false;
                            }
                            break;
                    }
                    break;
            }
            base.WndProc(ref m);
        }					

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        private Hotkey HK;
        public f_MainForm()
        {
            InitializeComponent();
            HK = new Hotkey();
            HK.enable(this.Handle, Hotkey.Modifiers.Win, Keys.Y);
        }