C# HOOK 键盘事件

C# HOOK 键盘事件

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/* by: wgscd date:2023-8-15 desc: test hook in c# */ using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Diagnostics; using System.Runtime.InteropServices; using System.Windows.Forms;   namespace TestHook {     internal class HookHelper     {         private delegate IntPtr LowLevelKeyboardProc(int nCode, IntPtr wParam, IntPtr lParam);           private static LowLevelKeyboardProc _proc = HookCallback;           private const int WH_KEYBOARD_LL = 13;         private const int WM_KEYDOWN = 0x0100;           private static IntPtr _hookID = IntPtr.Zero;           [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]         private static extern IntPtr SetWindowsHookEx(int idHook, LowLevelKeyboardProc lpfn, IntPtr hMod, uint dwThreadId);           [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]         [return: MarshalAs(UnmanagedType.Bool)]         private static extern bool UnhookWindowsHookEx(IntPtr hhk);           [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]         private static extern IntPtr CallNextHookEx(IntPtr hhk, int nCode, IntPtr wParam, IntPtr lParam);           public static void SetHook()         {             using (Process curProcess = Process.GetCurrentProcess())             using (ProcessModule curModule = curProcess.MainModule)             {                 _hookID = SetWindowsHookEx(WH_KEYBOARD_LL, _proc, curModule.BaseAddress, 0);             }         }           private static IntPtr HookCallback(int nCode, IntPtr wParam, IntPtr lParam)         {             if (nCode >= 0 && wParam == (IntPtr)WM_KEYDOWN)             {                 //打印按下的键，包含组合键                 int vkCode = Marshal.ReadInt32(lParam);                 var combo = Control.ModifierKeys.ToString();//组合键                 if (combo != "None")                 {                     Debug.Print(combo.Replace(",", "+") + "+" + (Keys)vkCode);                 }                 else                 {                     Debug.Print("" + (Keys)vkCode);                 }               }               return CallNextHookEx(_hookID, nCode, wParam, lParam);         }           public static void Unhook()         {             UnhookWindowsHookEx(_hookID);         }           } }

　　

 

调用：

TestHook.SetHook();

在不需要的时候卸载 ：

Unhook（）