using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;
using System.Security.Cryptography;
using System.Diagnostics;
using System.IO;
using System.Reflection;


namespace LockScreen
{
    public partial class frmLockScreen : Form
    {
        public frmLockScreen()
        {
            InitializeComponent();
        }
        private string filePath=Application.StartupPath+@"\config.ini";
        private string pwd;
        private int i=0;
        public string IniReadValue(string Section,string Key,string FilePath)
        {
           StringBuilder temp=new StringBuilder(255);
            int i=Win32API.GetPrivateProfileString(Section,Key,"",temp,255,FilePath);
            return temp.ToString();
        }
#region
        public delegate int HookProc(int nCode, Int32 wParam, IntPtr lParam);
         HookProc KeyBoardProcedure;
        static int hHook=0;
        public const int WH_KEYBOARD=13;
        public struct KeyBoardHookStruct
        {
            public int vkCode;
            public int scanCode;
            public int flags;
            public int time;
            public int dwExtraInfo;
        }
        
        public void HookStart()
        {
            if(hHook==0)
            {
                KeyBoardProcedure=new HookProc(frmLockScreen.KeyBoardHookProc);
                hHook = Win32API.SetWindowsHookEx(WH_KEYBOARD, KeyBoardProcedure, Win32API.GetModuleHandle(Process.GetCurrentProcess().MainModule.ModuleName), 0);
                if(hHook==0)
                {
                    HookClear();
                }
            }
        }
        public void HookClear()
        {
            bool rsetKeyboard=true;
            if(hHook!=0)
            {
                rsetKeyboard=Win32API.UnhookWindowsHookEx(hHook);
                hHook=0;
            }
            if(!rsetKeyboard)
            {
                throw new Exception("取消钩子失败！");
            }
        }
        public static int KeyBoardHookProc(int nCode,int wParam,IntPtr lParam)
        {
            if(nCode>=0)
            {
                KeyBoardHookStruct kbh=(KeyBoardHookStruct)Marshal.PtrToStructure(lParam,typeof(KeyBoardHookStruct));
                if(kbh.vkCode==91)
                {
                    return 1;
                } 
                 if(kbh.vkCode==92)
                {
                    return 1;
                }
                 if(kbh.vkCode==(int)Keys.Escape&&(int)Control.ModifierKeys==(int)Keys.Control)
                {
                    return 1;
                }
                 if(kbh.vkCode==(int)Keys.F4&&(int)Control.ModifierKeys==(int)Keys.Alt)
                {
                    return 1;
                }
                if(kbh.vkCode==(int)Keys.Tab&&(int)Control.ModifierKeys==(int)Keys.Alt)
                {
                    return 1;
                }
             }
               return Win32API.CallNextHookEx(hHook,nCode,wParam,lParam);
        }
        public static string MD5_Str(string PWD)
        {
            MD5 md5=MD5.Create();
            byte[]s=md5.ComputeHash(Encoding.UTF8.GetBytes(PWD));
            string password="";
            for(int i=0;i<s.Length;i++)
            {
                password+=s[i].ToString();
            }
            return password;
        }
       

        private void frmLockScreen_Load(object sender, EventArgs e)
        { 
            HookStart();
            pwd=IniReadValue("config","password",filePath);
            st