捕获左/右软键按下＆mdash; C＃.net CF 3.5

public class HButtons : System.Windows.Forms.Form
{
    private MainMenu mainMenu1;
    private MenuItem mnuBack;
    myMessageWindow messageWindow;

    public HButtons()
    {
        InitializeComponent();

        this.messageWindow = new myMessageWindow(this); 
        RegisterHKeys.RegisterRecordKey(this.messageWindow.Hwnd);
    }
    protected override void Dispose(bool disposing)
    {
        RegisterHKeys.UnRegisterRecordKey();
         base.Dispose(disposing);
    }

    public void ButtonPressed(int button)
    {
        switch (button)
            {
                case (int)KeysHardware.VK_APP1:
                    MessageBox.Show("VK_APP1 pressed!");
                    break;
                case (int)KeysHardware.GreenPhoneButton:
                    MessageBox.Show("GreenPhoneButton pressed!");
                    break;
                case (int)KeysHardware.RedPhoneButton:
                    MessageBox.Show("RedPhoneButton pressed!");
                    break;

                case (int)KeysHardware.VK_TSOFT1:
                    MessageBox.Show("VK_TSOFT1 pressed!");
                    break;

            }
        }

        private void InitializeComponent()
        {
            this.mainMenu1 = new System.Windows.Forms.MainMenu();
            this.mnuBack = new System.Windows.Forms.MenuItem();
            this.SuspendLayout();
            // 
            // mainMenu1
            // 
            this.mainMenu1.MenuItems.Add(this.mnuBack);
            // 
            // mnuBack
            // 
            this.mnuBack.Text = "Back";
            this.mnuBack.Click += new System.EventHandler(this.mnuBack_Click);
            // 
            // HButtons
            // 
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Inherit;
            this.ClientSize = new System.Drawing.Size(240, 268);
            this.Menu = this.mainMenu1;
            this.MinimizeBox = false;
            this.Name = "HButtons";
            this.Text = "HW buttons";
            this.ResumeLayout(false);

        }

        private void mnuBack_Click(object sender, EventArgs e)
        {
            this.Close();
        }
    }

    public class myMessageWindow : MessageWindow
    {
        public const int WM_HOTKEY = 0x0312;
        HButtons example;
        public myMessageWindow(HButtons anExample)
        {
            this.example = anExample;
        }
        protected override void WndProc(ref Message msg)
        {
            switch (msg.Msg)
            {
                case WM_HOTKEY:
                    example.ButtonPressed(msg.WParam.ToInt32());
                    return;
            }
            base.WndProc(ref msg);
        }
    }

    public class RegisterHKeys
    {
        [DllImport("coredll.dll", SetLastError = true)]
        public static extern bool RegisterHotKey(
            IntPtr hWnd, // handle to window
            int id, // hot key identifier
            KeyModifiers Modifiers, // key-modifier options
            int key //virtual-key code
        );

        [DllImport("coredll.dll")]
        private static extern bool UnregisterFunc1(
            KeyModifiers modifiers, 
            int keyID);

        public static void RegisterRecordKey(IntPtr hWnd)
        {
            UnregisterFunc1(KeyModifiers.Windows, (int)KeysHardware.VK_APP1);
            RegisterHotKey(hWnd, (int)KeysHardware.VK_APP1, KeyModifiers.Windows, (int)KeysHardware.VK_APP1);

            UnregisterFunc1(KeyModifiers.None, (int)KeysHardware.GreenPhoneButton);
            RegisterHotKey(hWnd, (int)KeysHardware.GreenPhoneButton, KeyModifiers.None, (int)KeysHardware.GreenPhoneButton);

            UnregisterFunc1(KeyModifiers.None, (int)KeysHardware.RedPhoneButton);
            RegisterHotKey(hWnd, (int)KeysHardware.RedPhoneButton, KeyModifiers.None, (int)KeysHardware.RedPhoneButton);

            UnregisterFunc1(KeyModifiers.None, (int)KeysHardware.VK_TSOFT1);
            RegisterHotKey(hWnd, (int)KeysHardware.VK_TSOFT1, KeyModifiers.None, (int)KeysHardware.VK_TSOFT1);

        }

        public static void UnRegisterRecordKey()
        {
            UnregisterFunc1(KeyModifiers.Windows, (int)KeysHardware.VK_APP1);
            UnregisterFunc1(KeyModifiers.None, (int)KeysHardware.GreenPhoneButton);
            UnregisterFunc1(KeyModifiers.None, (int)KeysHardware.RedPhoneButton);
            UnregisterFunc1(KeyModifiers.None, (int)KeysHardware.VK_TSOFT1);
        }
    }

    ///// <summary>
    ///// Summary description for hwButtons.
    ///// </summary>
    //public class hwButtons
    //{
    //    public hwButtons()
    //    {
    //        HButtons theBtns = new HButtons();
    //    }
    //}

    public enum KeyModifiers
    {
        None = 0,
        Alt = 1,
        Control = 2,
        Shift = 4,
        Windows = 8,
        Modkeyup = 0x1000,
    }
    //public enum KeysHardware : int
    //{
    //    Hardware1 = 193, //0xC1
    //    Hardware2 = 194,
    //    Hardware3 = 195,
    //    Hardware4 = 196,
    //    Hardware5 = 197
    //}

    public enum KeysHardware : int
    {
        VK_F1 = 0x70,
        VK_F2 = 0x71,
        VK_F3 = 0x72,
        VK_F4 = 0x73,
        VK_F5 = 0x74,
        VK_F6 = 0x75,
        VK_F7 = 0x76,
        VK_F8 = 0x77,
        VK_F9 = 0x78,
        VK_F10 = 0x79,
        VK_F11 = 0x7A,
        VK_F12 = 0x7B,
        VK_TSOFT1 = VK_F1, // Softkey 1
        VK_TSOFT2 = VK_F2, // Softkey 2
        VK_TTALK = VK_F3, // Talk = Green Phone Button
        VK_TEND = VK_F4, // End = Red Phone Button
        VK_APP1 = 0xC1, // up to 6 other hardware buttons
        VK_APP2 = 0xC2,
        VK_APP3 = 0xC3,
        VK_APP4 = 0xC4,
        VK_APP5 = 0xC5,
        VK_APP6 = 0xC6,

        RedPhoneButton = VK_TEND,
        GreenPhoneButton = VK_TTALK
    }