class1.cs

实现pda键盘硬按钮的屏蔽

using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;
using Microsoft.WindowsCE.Forms;


namespace TestForm
{
    public class KeyModifers
    {

        public const uint MOD_ALT = 0x1;

        public const uint MOD_CONTROL = 0x2;

        public const uint MOD_SHIFT = 0x4;

        public const uint MOD_WIN = 0x8;

    }

    //声明硬件按键常量  只能是这几个值

    public class KeysHardware
    {

        public const uint Hardware1 = 193;

        public const uint Hardware2 = 194;

        public const uint Hardware3 = 195;

        public const uint Hardware4 = 196;

        public const uint Hardware5 = 197;

    }



    //第二步，封装两个api函数，调用非托管dll函数类

    public class RegisterHotKeys
    {

        //声明api

        [DllImport("coredll.dll")]

        private static extern bool UnregisterFunc1(

        uint fsModifiers, //组合键的键值

        uint vk //热键键值

        );



        [DllImport("coredll.dll")]

        private static extern bool RegisterHotKey(

         IntPtr hWnd, //要注册的窗体的句柄 

         int id, // 热键的键值

         uint fsModifiers, //组合键的键值 

         uint vk // virtual-key code （虚拟键的编码，这里和第二个参数一样）

        );



        [DllImport("coredll.dll")]

        private static extern bool UnregisterHotKey(

         IntPtr hWnd, //要注册的窗体的句柄

         int id //热键的键值

        );

        //end



        //注册热键，封装了UnregisterFunc1和RegisterHotKey

        private static bool _mRegisterHotKey(IntPtr hwnd, int id, uint vk)
        {

           // bool re = UnregisterFunc1(KeyModifers.MOD_WIN, vk);
            bool re = UnregisterFunc1(KeyModifers.MOD_ALT, vk);

            bool re1 = RegisterHotKey(hwnd, id, KeyModifers.MOD_WIN, vk);

            return re && re1;

        }



        public static bool RegisterHotKey(IntPtr hwnd)
        {

            bool re = true;

            for (int i = (int)KeysHardware.Hardware1; i <= (int)KeysHardware.Hardware5; i++)
            {

                re = _mRegisterHotKey(hwnd, i, (uint)i);

                if (!re) break;

            }

            return re;

        }



        public static bool UnRegisterHotKey(IntPtr hwnd)
        {

            bool re = true;

            for (int i = (int)KeysHardware.Hardware1; i <= (int)KeysHardware.Hardware5; i++)
            {

                UnregisterHotKey(hwnd, i);

                if (!re) break;

            }

            return re;

        }



    }//大家可以看到这个类只有两个public函数，其他的函数对外不提供，为内部服务


    //第三步重写消息循环，定义消息窗体，并重写wndproc方法

    public class MyMsgWindow : MessageWindow
    {

        public const int WM_HOTKEY = 0x0312;

        private TestForm form = null; //TestForm为你的热键要注册的应用主窗体



        public MyMsgWindow(TestForm form)
        {

            this.form = form;

        }

        protected override void WndProc(ref Message msg)
        {

            switch (msg.Msg)
            {

                case WM_HOTKEY:

                    form.clickHardWareButton(msg.WParam.ToInt32());//clickHardWareButton是////你在主窗体中定义的按钮事件函数，在这里被调用
                    
                    return;

            }

            base.WndProc(ref msg);

        }

    }

}