cyf
124 lines
3.9 KiB
C#
124 lines
3.9 KiB
C#
using System;
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using System.Diagnostics;
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using System.Runtime.InteropServices;
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using System.Windows.Forms;
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using static WindowsFormsApplication1.Win32Api;
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namespace WindowsFormsApplication1
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{
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/**
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* c#钩子程序 键盘监控(拦截系统组合键)
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* */
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public class Win32Api
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{
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#region 常数和结构
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public const int WM_KEYDOWN = 0x100;
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public const int WM_KEYUP = 0x101;
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public const int WM_SYSKEYDOWN = 0x104;
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public const int WM_SYSKEYUP = 0x105;
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public const int WH_KEYBOARD_LL = 13;
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[StructLayout(LayoutKind.Sequential)] //声明键盘钩子的封送结构类型
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public class KeyboardHookStruct
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{
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public int vkCode; //表示一个在1到254间的虚似键盘码
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public int scanCode; //表示硬件扫描码
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public int flags;
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public int time;
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public int dwExtraInfo;
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}
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#endregion
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#region Api
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public delegate int HookProc(int nCode, Int32 wParam, IntPtr lParam);
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//安装钩子的函数
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[DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
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public static extern int SetWindowsHookEx(int idHook, HookProc lpfn, IntPtr hInstance, int threadId);
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//卸下钩子的函数
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[DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
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public static extern bool UnhookWindowsHookEx(int idHook);
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//下一个钩挂的函数
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[DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
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public static extern int CallNextHookEx(int idHook, int nCode, Int32 wParam, IntPtr lParam);
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[DllImport("user32")]
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public static extern int ToAscii(int uVirtKey, int uScanCode, byte[] lpbKeyState, byte[] lpwTransKey, int fuState);
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[DllImport("user32")]
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public static extern int GetKeyboardState(byte[] pbKeyState);
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[DllImport("kernel32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
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public static extern IntPtr GetModuleHandle(string lpModuleName);
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#endregion
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}
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public class KeyboardHook
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{
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int hHook;
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Win32Api.HookProc KeyboardHookDelegate;
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public event KeyEventHandler OnKeyDownEvent;
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public event KeyEventHandler OnKeyUpEvent;
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public event KeyPressEventHandler OnKeyPressEvent;
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/// <summary>
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/// 正在执行回车事件中
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/// </summary>
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public bool IsExecute = false;
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public KeyboardHook() { }
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/**
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* 设置钩子
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* */
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public void SetHook()
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{
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KeyboardHookDelegate = new Win32Api.HookProc(KeyboardHookProc);
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Process cProcess = Process.GetCurrentProcess();
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ProcessModule cModule = cProcess.MainModule;
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var mh = Win32Api.GetModuleHandle(cModule.ModuleName);
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hHook = Win32Api.SetWindowsHookEx(Win32Api.WH_KEYBOARD_LL, KeyboardHookDelegate, mh, 0);
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}
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/**
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* 卸载钩子
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* */
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public void UnHook()
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{
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Win32Api.UnhookWindowsHookEx(hHook);
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}
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/**
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* 拦截按键
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* nCode参数是钩子代码，钩子子程使用这个参数来确定任务，这个参数的值依赖于Hook类型。
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* wParam和lParam参数包含了消息信息，我们可以从中提取需要的信息。
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* */
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private int KeyboardHookProc(int nCode, Int32 wParam, IntPtr lParam)
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{
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if (nCode >= 0)
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{
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KeyboardHookStruct kbh = (KeyboardHookStruct)Marshal.PtrToStructure(lParam, typeof(KeyboardHookStruct));
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if (kbh.vkCode == 13&& IsExecute)
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{
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return 1;
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}
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}
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return Win32Api.CallNextHookEx(hHook, nCode, wParam, lParam);
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}
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}
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} |