using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;
using System.Reflection;
using System.Diagnostics;
namespace WindowsApplication1
{
/// <summary>
/// Description of MainForm.
/// </summary>
public partial class Form4 : Form
{
//委托
public delegate int HookProc(int nCode, int wParam, IntPtr lParam);
static int hHook = 0;
public const int WH_KEYBOARD_LL = 13;
//LowLevel键盘截获,如果是WH_KEYBOARD=2,并不能对系统键盘截取,Acrobat Reader会在你截取之前获得键盘。
HookProc KeyBoardHookProcedure;
//键盘Hook结构函数
[StructLayout(LayoutKind.Sequential)]
public class KeyBoardHookStruct
{
public int vkCode;
public int scanCode;
public int flags;
public int time;
public int dwExtraInfo;
}
#region DllImport
//设置钩子
[DllImport("user32.dll")]
public static extern int SetWindowsHookEx(int idHook, HookProc lpfn, IntPtr hInstance, int threadId);
[DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
//抽掉钩子
public static extern bool UnhookWindowsHookEx(int idHook);
[DllImport("user32.dll")]
//调用下一个钩子
public static extern int CallNextHookEx(int idHook, int nCode, int wParam, IntPtr lParam);
[DllImport("kernel32.dll")]
public static extern int GetCurrentThreadId();
[DllImport("kernel32.dll")]
public static extern IntPtr GetModuleHandle(string name);
#endregion
#region 自定义事件
public void Hook_Start()
{
// 安装键盘钩子
if (hHook == 0)
{
KeyBoardHookProcedure = new HookProc(KeyBoardHookProc);
UserActivityHook.cs 代码:
using System;
using System.Runtime.InteropServices;
using System.Windows.Forms;
using System.Reflection;
namespace WindowsApplication3
{
public class UserActivityHook
{
[DllImport("user32.dll", CallingConvention = CallingConvention.StdCall, CharSet = CharSet.Auto)]
public static extern int CallNextHookEx(int idHook, int nCode, int wParam, IntPtr lParam);
[DllImport("user32.dll", CallingConvention = CallingConvention.StdCall, CharSet = CharSet.Auto)]
public static extern int SetWindowsHookEx(int idHook, HookProc lpfn, IntPtr hInstance, int threadId);
public UserActivityHook(int keyCode)
{
this.Start();
this.code = keyCode;
}
private int KeyboardHookProc(int nCode, int wParam, IntPtr lParam)
{
KeyboardHookStruct struct2 = (KeyboardHookStruct)Marshal.PtrToStructure(lParam, typeof(KeyboardHookStruct));
KeyEventArgs args = new KeyEventArgs((Keys)struct2.vkCode);
Console.WriteLine(args.KeyValue.ToString());
if (args.KeyValue == code)//prevent which key code, $$$$$$$$
{
return 1;
}
return CallNextHookEx(hKeyboardHook, nCode, wParam, lParam);
}
public void Start()
{
if (hKeyboardHook == 0)
{
this.KeyboardHookProcedure = new HookProc(this.KeyboardHookProc);
Module m = Assembly.GetExecutingAssembly().GetModules()[0];
IntPtr p = Marshal.GetHINSTANCE(m);
hKeyboardHook = SetWindowsHookEx(13, this.KeyboardHookProcedure, p, 0);
if (hKeyboardHook == 0)
{
this.Stop();
throw new Exception("SetWindowsHookEx ist failed.");
}
}
}
public void Stop()
{
bool flag = true;
if (hKeyboardHook != 0)
{
flag = UnhookWindowsHookEx(hKeyboardHook);
hKeyboardHook = 0;
}
if (!flag)
{
throw new Exception("UnhookWindowsHookEx failed.");
}
}
~UserActivityHook()
{
this.Stop();
}
[StructLayout(LayoutKind.Sequential)]
public class KeyboardHookStruct
{
public int vkCode;
public int scanCode;
public int flags;
public int time;
public int dwExtraInfo;