C#实现可捕获几乎所有键盘鼠标事件的钩子类完整实例_c

键盘事件

鼠标事件

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C#实现可捕获几乎所有键盘鼠标事件的钩子类完整实例实现可捕获几乎所有键盘鼠标事件的钩子类完整实例

主要介绍了C#实现可捕获几乎所有键盘鼠标事件的钩子类,以完整实例形式分析了C#捕获键盘鼠标事件的钩子操

作技巧,具有一定参考借鉴价值,需要的朋友可以参考下

本文实例讲述了C#实现可捕获几乎所有键盘鼠标事件的钩子类。分享给大家供大家参考，具体如下：

using System;

using System.Text;

using System.Runtime.InteropServices;

using System.Reflection;

using System.Windows.Forms;

namespace MouseKeyboardLibrary

{

/// <summary>

/// Abstract base class for Mouse and Keyboard hooks

/// </summary>

public abstract class GlobalHook

{

#region Windows API Code

[StructLayout(LayoutKind.Sequential)]

protected class POINT

{

public int x;

public int y;

}

[StructLayout(LayoutKind.Sequential)]

protected class MouseHookStruct

{

public POINT pt;

public int hwnd;

public int wHitTestCode;

public int dwExtraInfo;

}

[StructLayout(LayoutKind.Sequential)]

protected class MouseLLHookStruct

{

public POINT pt;

public int mouseData;

public int flags;

public int time;

public int dwExtraInfo;

}

[StructLayout(LayoutKind.Sequential)]

protected class KeyboardHookStruct

{

public int vkCode;

public int scanCode;

public int flags;

public int time;

public int dwExtraInfo;

}

[DllImport("user32.dll", CharSet = CharSet.Auto,

CallingConvention = CallingConvention.StdCall, SetLastError = true)]

protected static extern int SetWindowsHookEx(

int idHook,

HookProc lpfn,

IntPtr hMod,

int dwThreadId);

[DllImport("user32.dll", CharSet = CharSet.Auto,

CallingConvention = CallingConvention.StdCall, SetLastError = true)]

protected static extern int UnhookWindowsHookEx(int idHook);

[DllImport("user32.dll", CharSet = CharSet.Auto,

CallingConvention = CallingConvention.StdCall)]

protected static extern int CallNextHookEx(

int idHook,

int nCode,

int wParam,

IntPtr lParam);

[DllImport("user32")]

protected static extern int ToAscii(

int uVirtKey,

int uScanCode,

byte[] lpbKeyState,

byte[] lpwTransKey,

int fuState);

[DllImport("user32")]

protected static extern int GetKeyboardState(byte[] pbKeyState);

[DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]

protected static extern short GetKeyState(int vKey);

protected delegate int HookProc(int nCode, int wParam, IntPtr lParam);

protected const int WH_MOUSE_LL = 14;

protected const int WH_KEYBOARD_LL = 13;

protected const int WH_MOUSE = 7;

protected const int WH_KEYBOARD = 2;

protected const int WM_MOUSEMOVE = 0x200;

protected const int WM_LBUTTONDOWN = 0x201;

protected const int WM_RBUTTONDOWN = 0x204;

protected const int WM_MBUTTONDOWN = 0x207;

protected const int WM_LBUTTONUP = 0x202;

protected const int WM_RBUTTONUP = 0x205;

protected const int WM_MBUTTONUP = 0x208;

protected const int WM_LBUTTONDBLCLK = 0x203;

protected const int WM_RBUTTONDBLCLK = 0x206;

protected const int WM_MBUTTONDBLCLK = 0x209;

protected const int WM_MOUSEWHEEL = 0x020A;

protected const int WM_KEYDOWN = 0x100;

protected const int WM_KEYUP = 0x101;

protected const int WM_SYSKEYDOWN = 0x104;

protected const int WM_SYSKEYUP = 0x105;

protected const byte VK_SHIFT = 0x10;

protected const byte VK_CAPITAL = 0x14;

protected const byte VK_NUMLOCK = 0x90;

protected const byte VK_LSHIFT = 0xA0;

protected const byte VK_RSHIFT = 0xA1;

protected const byte VK_LCONTROL = 0xA2;

protected const byte VK_RCONTROL = 0x3;

protected const byte VK_LALT = 0xA4;

protected const byte VK_RALT = 0xA5;

protected const byte LLKHF_ALTDOWN = 0x20;

#endregion

#region Private Variables

protected int _hookType;

protected int _handleToHook;

protected bool _isStarted;

protected HookProc _hookCallback;

#endregion

#region Properties

public bool IsStarted

{

get

{

return _isStarted;

}

#endregion

#region Constructor

public GlobalHook()

{

Application.ApplicationExit += new EventHandler(Application_ApplicationExit);

}

#endregion

#region Methods

public void Start()

{

if (!_isStarted &&

_hookType != 0)

{

// Make sure we keep a reference to this delegate!

// If not, GC randomly collects it, and a NullReference exception is thrown

_hookCallback = new HookProc(HookCallbackProcedure);

_handleToHook = SetWindowsHookEx(

_hookType,

_hookCallback,

//Marshal.GetHINSTANCE(Assembly.GetExecutingAssembly().GetModules()[0]),

0);

IntPtr.Zero;

// Were we able to sucessfully start hook?

if (_handleToHook != 0)

{

_isStarted = true;

}

public void Stop()

{

if (_isStarted)

{

UnhookWindowsHookEx(_handleToHook);

_isStarted = false;

}

protected virtual int HookCallbackProcedure(int nCode, Int32 wParam, IntPtr lParam)

{

// This method must be overriden by each extending hook

return 0;

}

protected void Application_ApplicationExit(object sender, EventArgs e)

{

if (_isStarted)

{

Stop();

}

#endregion

}

using System;

using System.Text;

using System.Windows.Forms;

using System.Runtime.InteropServices;

namespace MouseKeyboardLibrary

{

/// <summary>

/// Captures global keyboard events

/// </summary>

public class KeyboardHook : GlobalHook

{

#region Events

public event KeyEventHandler KeyDown;

public event KeyEventHandler KeyUp;

public event KeyPressEventHandler KeyPress;

#endregion

#region Constructor

public KeyboardHook()

{

_hookType = WH_KEYBOARD_LL;

}

#endregion

#region Methods

protected override int HookCallbackProcedure(int nCode, int wParam, IntPtr lParam)

{

bool handled = false;

if (nCode > -1 && (KeyDown != null || KeyUp != null || KeyPress != null))

{

KeyboardHookStruct keyboardHookStruct =

(KeyboardHookStruct)Marshal.PtrToStructure(lParam, typeof(KeyboardHookStruct));

// Is Control being held down?

bool control = ((GetKeyState(VK_LCONTROL) & 0x80) != 0) ||

((GetKeyState(VK_RCONTROL) & 0x80) != 0);

// Is Shift being held down?

bool shift = ((GetKeyState(VK_LSHIFT) & 0x80) != 0) ||

((GetKeyState(VK_RSHIFT) & 0x80) != 0);

// Is Alt being held down?

bool alt = ((GetKeyState(VK_LALT) & 0x80) != 0) ||

((GetKeyState(VK_RALT) & 0x80) != 0);

// Is CapsLock on?

bool capslock = (GetKeyState(VK_CAPITAL) != 0);

// Create event using keycode and control/shift/alt values found above

KeyEventArgs e = new KeyEventArgs(

(Keys)(

keyboardHookStruct.vkCode |

(control ? (int)Keys.Control : 0) |

(shift ? (int)Keys.Shift : 0) |

(alt ? (int)Keys.Alt : 0)

));

// Handle KeyDown and KeyUp events

switch (wParam)

{

case WM_KEYDOWN:

case WM_SYSKEYDOWN:

if (KeyDown != null)

{

KeyDown(this, e);

handled = handled || e.Handled;

}

break;

case WM_KEYUP:

case WM_SYSKEYUP:

if (KeyUp != null)

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