KeysHoot.cs
using System; using System.Collections.Generic; using System.ComponentModel; using System.Diagnostics; using System.Linq; using System.Text; using System.Runtime.InteropServices; using System.Windows.Forms; namespace Mouse { public partial class KeysHoot : Component { public KeysHoot() { InitializeComponent(); this.Start(); } public KeysHoot(IContainer container) { container.Add(this); this.Start(); InitializeComponent(); } ~KeysHoot() { Stop(); } #region 全局常量声明 private const int WM_KEYDOWN = 0x100; private const int WM_KEYUP = 0x101; private const int WM_SYSKEYDOWN = 0x104; private const int WM_SYSKEYUP = 0x105; #endregion #region 全局的事件 public event KeyEventHandler OnKeyDownEvent; public event KeyEventHandler OnKeyUpEvent; public event KeyPressEventHandler OnKeyPressEvent; #endregion #region 鼠标常量 static int hKeyboardHook = 0; //键盘钩子句柄 public const int WH_KEYBOARD_LL = 13; //类型 定义在winuser.h #endregion #region 有关键盘 HookProc KeyboardHookProcedure; //声明键盘钩子事件类型. //声明键盘钩子的封送结构类型 [StructLayout(LayoutKind.Sequential)] public class KeyboardHookStruct { public int vkCode; //表示一个在1到254间的虚似键盘码 public int scanCode; //表示硬件扫描码 public int flags; public int time; public int dwExtraInfo; } #endregion #region api //装置钩子的函数 [DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)] public static extern int SetWindowsHookEx(int idHook, HookProc lpfn, IntPtr hInstance, int threadId); //卸下钩子的函数 [DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)] public static extern bool UnhookWindowsHookEx(int idHook); //下一个钩挂的函数 [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); [DllImport("kernel32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)] private static extern IntPtr GetModuleHandle(string lpModuleName); public delegate int HookProc(int nCode, Int32 wParam, IntPtr lParam); //先前按下的键 public List<Keys> preKeys = new List<Keys>(); #endregion #region 键盘钩子安装与卸载处理 /// <summary> /// 安装键盘钩子 /// </summary> public void Start() { //安装键盘钩子 if (hKeyboardHook == 0) { KeyboardHookProcedure = new HookProc(KeyboardHookProc); //hKeyboardHook = SetWindowsHookEx(WH_KEYBOARD_LL, KeyboardHookProcedure, Marshal.GetHINSTANCE(Assembly.GetExecutingAssembly().GetModules()[0]), 0); Process curProcess = Process.GetCurrentProcess(); ProcessModule curModule = curProcess.MainModule; hKeyboardHook = SetWindowsHookEx(WH_KEYBOARD_LL, KeyboardHookProcedure, GetModuleHandle(curModule.ModuleName), 0); if (hKeyboardHook == 0) { Stop(); throw new Exception("安装键盘钩子"); } } } /// <summary> /// 卸载键盘钩子 /// </summary> public void Stop() { bool retKeyboard = true; if (hKeyboardHook != 0) { retKeyboard = UnhookWindowsHookEx(hKeyboardHook); hKeyboardHook = 0; } //如果卸下钩子失败 if (!(retKeyboard)) throw new Exception("卸下钩子失败"); } #endregion #region 处理方法 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)); //当有OnKeyDownEvent 或 OnKeyPressEvent不为null时,ctrl alt shift keyup时 preKeys //中的对应的键增加 if ((OnKeyDownEvent != null || OnKeyPressEvent != null) && (wParam == WM_KEYDOWN || wParam == WM_SYSKEYDOWN)) { Keys keyData = (Keys)MyKeyboardHookStruct.vkCode; if (IsCtrlAltShiftKeys(keyData) && preKeys.IndexOf(keyData) == -1) { preKeys.Add(keyData); } } //引发OnKeyDownEvent if (OnKeyDownEvent != null && (wParam == WM_KEYDOWN || wParam == WM_SYSKEYDOWN)) { Keys keyData = (Keys)MyKeyboardHookStruct.vkCode; KeyEventArgs e = new KeyEventArgs(GetDownKeys(keyData)); OnKeyDownEvent(this, e); } //引发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); } } //当有OnKeyDownEvent 或 OnKeyPressEvent不为null时,ctrl alt shift keyup时 preKeys //中的对应的键删除 if ((OnKeyDownEvent != null || OnKeyPressEvent != null) && (wParam == WM_KEYUP || wParam == WM_SYSKEYUP)) { Keys keyData = (Keys)MyKeyboardHookStruct.vkCode; if (IsCtrlAltShiftKeys(keyData)) { for (int i = preKeys.Count - 1; i >= 0; i--) { if (preKeys[i] == keyData) { preKeys.RemoveAt(i); } } } } //引发OnKeyUpEvent if (OnKeyUpEvent != null && (wParam == WM_KEYUP || wParam == WM_SYSKEYUP)) { Keys keyData = (Keys)MyKeyboardHookStruct.vkCode; KeyEventArgs e = new KeyEventArgs(GetDownKeys(keyData)); OnKeyUpEvent(this, e); } } return CallNextHookEx(hKeyboardHook, nCode, wParam, lParam); } private Keys GetDownKeys(Keys key) { Keys rtnKey = Keys.None; foreach (Keys keyTemp in preKeys) { switch (keyTemp) { case Keys.LControlKey: case Keys.RControlKey: rtnKey = rtnKey | Keys.Control; break; case Keys.LMenu: case Keys.RMenu: rtnKey = rtnKey | Keys.Alt; break; case Keys.LShiftKey: case Keys.RShiftKey: rtnKey = rtnKey | Keys.Shift; break; default: break; } } rtnKey = rtnKey | key; return rtnKey; } private Boolean IsCtrlAltShiftKeys(Keys key) { switch (key) { case Keys.LControlKey: case Keys.RControlKey: case Keys.LMenu: case Keys.RMenu: case Keys.LShiftKey: case Keys.RShiftKey: return true; default: return false; } } #endregion } }
KeysHoot.Designer.cs
namespace Mouse { partial class KeysHoot { /// <summary> /// 必需的设计器变量。 /// </summary> private System.ComponentModel.IContainer components = null; /// <summary> /// 清理所有正在使用的资源。 /// </summary> /// <param name="disposing">如果应释放托管资源,为 true;否则为 false。</param> protected override void Dispose(bool disposing) { if (disposing && (components != null)) { components.Dispose(); } base.Dispose(disposing); } #region 组件设计器生成的代码 /// <summary> /// 设计器支持所需的方法 - 不要 /// 使用代码编辑器修改此方法的内容。 /// </summary> private void InitializeComponent() { components = new System.ComponentModel.Container(); } #endregion } }
源代码来源于网络 然后自己修改为组件
组件代码如下 :
作者:qq283868910 发表于2011-12-7 18:25:30 原文链接
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