问表单中任意位置的c#特定序列按键事件

EN

protected override bool ProcessCmdKey(ref Message msg, Keys keyData)
    {
        switch (keyData)
        {
            case (Keys.Control | Keys.Shift | Keys.V):
                textbox1.Enabled = true;
                textbox2.Enabled = true;
                return true;

      // more keys if you want

            case (Keys.Control | Keys.H):
                MessageBox.Show("Hello World!");
                return true;
        }

        return base.ProcessCmdKey(ref msg, keyData);
    }

public class BaseForm : Form
{
    private static List keyPress = new List(); // to store the key values
    public BaseForm()
    {
        this.KeyDown += new System.Windows.Forms.KeyEventHandler(this.BaseForm_KeyDown); // register event for all forms which inherits from BaseForm
    }

    private void BaseForm_KeyDown(object sender, KeyEventArgs e)
    {
        if (e.KeyCode == Keys.ControlKey || e.KeyCode == Keys.C || e.KeyCode == Keys.V) // right now Control, C, V keys are included
        {

            if (keyPress.Any(x => x == e.KeyCode)) // If keypress list has the current key press so pattern is broken
            {
                keyPress.Clear(); //clear the list user should start again
            }
            else
            {
                keyPress.Add(e.KeyCode);
            }

            if (keyPress.Count > 2) 
            {
                this.Controls["textBox1"].Enabled = true; 
                keyPress.Clear(); // clear the keyPress list
            }
        }
    }
}

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Runtime.InteropServices;
using System.Windows.Forms;
using System.Linq;

namespace KeyHookTryApp
{
   static class Program
   {
       private const int WH_KEYBOARD_LL = 13;
       private const int WM_KEYDOWN = 0x0100;
       private static LowLevelKeyboardProc _proc = HookCallback;
       private static IntPtr _hookID = IntPtr.Zero;
       private static Form1 f;
       private static List keyPress = new List();
       /// 
       /// The main entry point for the application.
       /// 
       [STAThread]
       static void Main()
       {
           _hookID = SetHook(_proc);
           Application.EnableVisualStyles();
           Application.SetCompatibleTextRenderingDefault(false);
           f = new Form1();
           Application.Run(f);
           UnhookWindowsHookEx(_hookID);
       }
       private static IntPtr SetHook(LowLevelKeyboardProc proc)
       {
           using (Process curProcess = Process.GetCurrentProcess())
           using (ProcessModule curModule = curProcess.MainModule)
           {
               return SetWindowsHookEx(WH_KEYBOARD_LL, proc,
                   GetModuleHandle(curModule.ModuleName), 0);
           }
       }

       private delegate IntPtr LowLevelKeyboardProc(int nCode, IntPtr wParam, IntPtr lParam);

       private static IntPtr HookCallback(int nCode, IntPtr wParam, IntPtr lParam)
       {
           int vkCode = Marshal.ReadInt32(lParam);
           Keys key = (Keys)vkCode;

           if (nCode >= 0 && ((key == Keys.LControlKey || key == Keys.RControlKey) || key == Keys.C || key == Keys.V))
           {
               if (keyPress.Any(x => x == key))
               {
                   keyPress.Clear();
               }
               else
               {
                   keyPress.Add(key);
               } 

               if (keyPress.Count > 2)
               {
                   f.Controls["textBox1"].Enabled = true;
                   keyPress.Clear();
               }
           }
           else if(keyPress.Count > 0)
           {
               keyPress.Clear();
           }

           return CallNextHookEx(_hookID, nCode, wParam, lParam);
       }

       [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);

       [DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]
       private static extern IntPtr GetModuleHandle(string lpModuleName);
   }
}

document.addEventListener('keydown', logKey);

function logKey(e) {
  log.textContent += ` ${e.code}`;
}