C#全局鼠標鍵盤Hook (備查)

using System;
using System.Collections.Generic;
using System.Reflection;
using System.Runtime.InteropServices;
using System.Text;
using System.Windows.Forms;

namespace DCIEngine.FrameWork.Snap
{
??? ///?? <summary>
??? ///?? 這個類可以讓你得到一個在運行中程序的所有鍵盤或鼠標事件
??? ///?? 并且引發一個帶KeyEventArgs參數的.NET事件以便你很容易使用這些信息
??? ///?? </summary>

??? public class KeyBordHook
??? {
??????? private const int WM_KEYDOWN = 0x100;
??????? private const int WM_KEYUP = 0x101;
??????? private const int WM_SYSKEYDOWN = 0x104;
??????? private const int WM_SYSKEYUP = 0x105;

??????? //全局的事件
??????? public event KeyEventHandler OnKeyDownEvent;
??????? public event KeyEventHandler OnKeyUpEvent;
??????? public event KeyPressEventHandler OnKeyPressEvent;
??????? static int hKeyboardHook = 0;?? //鍵盤鉤子句柄
??????? //鼠標常量
??????? public const int WH_KEYBOARD_LL = 13;?? //keyboard?? hook?? constant??
??????? HookProc KeyboardHookProcedure;?? //聲明鍵盤鉤子事件類型.
??????? //聲明鍵盤鉤子的封送結構類型
??????? [StructLayout(LayoutKind.Sequential)]
??????? public class KeyboardHookStruct
??????? {
??????????? public int vkCode;?? //表示一個在1到254間的虛似鍵盤碼
??????????? public int scanCode;?? //表示硬件掃描碼
??????????? public int flags;
??????????? public int time;
??????????? public int dwExtraInfo;
??????? }
??????? //裝置鉤子的函數
??????? [DllImport("user32.dll ", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
??????? public static extern int SetWindowsHookEx(int idHook, HookProc lpfn, IntPtr hInstance, int threadId);
??????? //卸下鉤子的函數
??????? [DllImport("user32.dll ", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
??????? public static extern bool UnhookWindowsHookEx(int idHook);

??????? //下一個鉤掛的函數
??????? [DllImport("user32.dll ", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
??????? public static extern int CallNextHookEx(int idHook, int nCode, Int32 wParam, IntPtr lParam);
??????? [DllImport("user32 ")]
??????? public static extern int ToAscii(int uVirtKey, int uScanCode, byte[] lpbKeyState, byte[] lpwTransKey, int fuState);
??????? [DllImport("user32 ")]
??????? public static extern int GetKeyboardState(byte[] pbKeyState);
??????? public delegate int HookProc(int nCode, Int32 wParam, IntPtr lParam);
??????? ///?? <summary>
??????? ///?? 墨認的構造函數構造當前類的實例并自動的運行起來.
??????? ///?? </summary>
??????? public KeyBordHook()
??????? {
??????????? Start();
??????? }
??????? //析構函數.
??????? ~KeyBordHook()
??????? {
??????????? Stop();
??????? }
??????? public void Start()
??????? {
??????????? //安裝鍵盤鉤子??
??????????? if (hKeyboardHook == 0)
??????????? {
??????????????? KeyboardHookProcedure = new HookProc(KeyboardHookProc);
??????????????? hKeyboardHook = SetWindowsHookEx(WH_KEYBOARD_LL, KeyboardHookProcedure, Marshal.GetHINSTANCE(Assembly.GetExecutingAssembly().ManifestModule), 0);
??????????????? if (hKeyboardHook == 0)
??????????????? {
??????????????????? Stop();
??????????????????? throw new Exception("SetWindowsHookEx?? ist?? failed. ");
??????????????? }
??????????? }
??????? }
??????? public void Stop()
??????? {
??????????? bool retKeyboard = true;

??????????? if (hKeyboardHook != 0)
??????????? {
??????????????? retKeyboard = UnhookWindowsHookEx(hKeyboardHook);
??????????????? hKeyboardHook = 0;
??????????? }
??????????? //如果卸下鉤子失敗
??????????? if (!(retKeyboard)) throw new Exception("UnhookWindowsHookEx?? failed. ");
??????? }
??????? private int KeyboardHookProc(int nCode, Int32 wParam, IntPtr lParam)
??????? {
??????????? if ((nCode >= 0) && (OnKeyDownEvent != null || OnKeyUpEvent != null || OnKeyPressEvent != null))
??????????? {
??????????????? KeyboardHookStruct MyKeyboardHookStruct = (KeyboardHookStruct)Marshal.PtrToStructure(lParam, typeof(KeyboardHookStruct));
??????????????? //引發OnKeyDownEvent
??????????????? if (OnKeyDownEvent != null && (wParam == WM_KEYDOWN || wParam == WM_SYSKEYDOWN))
??????????????? {
??????????????????? Keys keyData = (Keys)MyKeyboardHookStruct.vkCode;
??????????????????? KeyEventArgs e = new KeyEventArgs(keyData);
??????????????????? OnKeyDownEvent(this, e);
??????????????? }

??????????????? //引發OnKeyPressEvent
??????????????? if (OnKeyPressEvent != null && wParam == WM_KEYDOWN)
??????????????? {
??????????????????? byte[] keyState = new byte[256];
??????????????????? GetKeyboardState(keyState);
??????????????????? byte[] inBuffer = new byte[2];
??????????????????? if (ToAscii(MyKeyboardHookStruct.vkCode,
????????????????????? MyKeyboardHookStruct.scanCode,
????????????????????? keyState,
????????????????????? inBuffer,
????????????????????? MyKeyboardHookStruct.flags) == 1)
??????????????????? {
??????????????????????? KeyPressEventArgs e = new KeyPressEventArgs((char)inBuffer[0]);
??????????????????????? OnKeyPressEvent(this, e);
??????????????????? }
??????????????? }

??????????????? //引發OnKeyUpEvent
??????????????? if (OnKeyUpEvent != null && (wParam == WM_KEYUP || wParam == WM_SYSKEYUP))
??????????????? {
??????????????????? Keys keyData = (Keys)MyKeyboardHookStruct.vkCode;
??????????????????? KeyEventArgs e = new KeyEventArgs(keyData);
??????????????????? OnKeyUpEvent(this, e);
??????????????? }
??????????? }
??????????? return CallNextHookEx(hKeyboardHook, nCode, wParam, lParam);
??????? }
??? }


??? ///?? <summary>
??? ///?? 這個類可以讓你得到一個在運行中程序的所有鼠標事件
??? ///?? 并且引發一個帶MouseEventArgs參數的.NET鼠標事件以便你很容易使用這些信息
??? ///?? </summary>
??? public class MouseHook
??? {
??????? private const int WM_MOUSEMOVE = 0x200;
??????? private const int WM_LBUTTONDOWN = 0x201;
??????? private const int WM_RBUTTONDOWN = 0x204;
??????? private const int WM_MBUTTONDOWN = 0x207;
??????? private const int WM_LBUTTONUP = 0x202;
??????? private const int WM_RBUTTONUP = 0x205;
??????? private const int WM_MBUTTONUP = 0x208;
??????? private const int WM_LBUTTONDBLCLK = 0x203;
??????? private const int WM_RBUTTONDBLCLK = 0x206;
??????? private const int WM_MBUTTONDBLCLK = 0x209;
??????? //全局的事件
??????? public event MouseEventHandler OnMouseActivity;
??????? static int hMouseHook = 0;?? //鼠標鉤子句柄
??????? //鼠標常量
??????? public const int WH_MOUSE_LL = 14;?? //mouse?? hook?? constant
??????? HookProc MouseHookProcedure;?? //聲明鼠標鉤子事件類型.
??????? //聲明一個Point的封送類型
??????? [StructLayout(LayoutKind.Sequential)]
??????? public class POINT
??????? {
??????????? public int x;
??????????? public int y;
??????? }
??????? //聲明鼠標鉤子的封送結構類型
??????? [StructLayout(LayoutKind.Sequential)]
??????? public class MouseHookStruct
??????? {
??????????? public POINT pt;
??????????? public int hWnd;
??????????? public int wHitTestCode;
??????????? public int dwExtraInfo;
??????? }
??????? //裝置鉤子的函數
??????? [DllImport("user32.dll ", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
??????? public static extern int SetWindowsHookEx(int idHook, HookProc lpfn, IntPtr hInstance, int threadId);
??????? //卸下鉤子的函數
??????? [DllImport("user32.dll ", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
??????? public static extern bool UnhookWindowsHookEx(int idHook);

??????? //下一個鉤掛的函數
??????? [DllImport("user32.dll ", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
??????? public static extern int CallNextHookEx(int idHook, int nCode, Int32 wParam, IntPtr lParam);
??????? public delegate int HookProc(int nCode, Int32 wParam, IntPtr lParam);
??????? ///?? <summary>
??????? ///?? 墨認的構造函數構造當前類的實例.
??????? ///?? </summary>
??????? public MouseHook()
??????? {
??????????? //Start();
??????? }
??????? //析構函數.
??????? ~MouseHook()
??????? {
??????????? Stop();
??????? }
??????? public void Start()
??????? {
??????????? //安裝鼠標鉤子
??????????? if (hMouseHook == 0)
??????????? {
??????????????? //生成一個HookProc的實例.
??????????????? MouseHookProcedure = new HookProc(MouseHookProc);
??????????????? hMouseHook = SetWindowsHookEx(WH_MOUSE_LL, MouseHookProcedure, Marshal.GetHINSTANCE(Assembly.GetExecutingAssembly().GetModules()[0]), 0);
??????????????? //如果裝置失敗停止鉤子
??????????????? if (hMouseHook == 0)
??????????????? {
??????????????????? Stop();
??????????????????? throw new Exception("SetWindowsHookEx failed. ");
??????????????? }
??????????? }
??????? }
??????? public void Stop()
??????? {
??????????? bool retMouse = true;
??????????? if (hMouseHook != 0)
??????????? {
??????????????? retMouse = UnhookWindowsHookEx(hMouseHook);
??????????????? hMouseHook = 0;
??????????? }

??????????? //如果卸下鉤子失敗
??????????? if (!(retMouse)) throw new Exception("UnhookWindowsHookEx?? failed. ");
??????? }
??????? private int MouseHookProc(int nCode, Int32 wParam, IntPtr lParam)
??????? {
??????????? //如果正常運行并且用戶要監聽鼠標的消息
??????????? if ((nCode >= 0) && (OnMouseActivity != null))
??????????? {
??????????????? MouseButtons button = MouseButtons.None;
??????????????? int clickCount = 0;
??????????????? switch (wParam)
??????????????? {
??????????????????? case WM_LBUTTONDOWN:
??????????????????????? button = MouseButtons.Left;
??????????????????????? clickCount = 1;
??????????????????????? break;
??????????????????? case WM_LBUTTONUP:
??????????????????????? button = MouseButtons.Left;
??????????????????????? clickCount = 1;
??????????????????????? break;
??????????????????? case WM_LBUTTONDBLCLK:
??????????????????????? button = MouseButtons.Left;
??????????????????????? clickCount = 2;
??????????????????????? break;
??????????????????? case WM_RBUTTONDOWN:
??????????????????????? button = MouseButtons.Right;
??????????????????????? clickCount = 1;
??????????????????????? break;
??????????????????? case WM_RBUTTONUP:
??????????????????????? button = MouseButtons.Right;
??????????????????????? clickCount = 1;
??????????????????????? break;
??????????????????? case WM_RBUTTONDBLCLK:
??????????????????????? button = MouseButtons.Right;
??????????????????????? clickCount = 2;
??????????????????????? break;
??????????????? }
??????????????? //從回調函數中得到鼠標的信息
??????????????? MouseHookStruct MyMouseHookStruct = (MouseHookStruct)Marshal.PtrToStructure(lParam, typeof(MouseHookStruct));
??????????????? MouseEventArgs e = new MouseEventArgs(button, clickCount, MyMouseHookStruct.pt.x, MyMouseHookStruct.pt.y, 0);
??????????????? OnMouseActivity(this, e);
??????????? }
??????????? return CallNextHookEx(hMouseHook, nCode, wParam, lParam);
??????? }
??? }
}

轉載于:https://www.cnblogs.com/iEgrhn/archive/2008/02/17/1071392.html

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