C# 屏蔽系统的ctrl+c/x/v组合键

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace ShieldCtrlV
{
    public partial class Frm_Main : Form
    {
        public Frm_Main（）
        {
            InitializeComponent（）;
        }

        private void richTextBox1_KeyDown（object sender KeyEventArgs e）
        {
            if （e.Control && e.KeyCode == Keys.V）//若按下Ctrl+V组合键
            {
                e.Handled = true;//屏蔽Ctrl+V组合按键
                MessageBox.Show（“Ctrl+V组合键已屏蔽““信息提示“）;
            }
            if （e.Control && e.KeyCode == Keys.X）//若按下Ctrl+X组合键
            {
                e.Handled = true;//屏蔽Ctrl+X组合按键
                MessageBox.Show（“Ctrl+X组合键已屏蔽“ “信息提示“）;
            }
            if （e.Control && e.KeyCode == Keys.C）//若按下Ctrl+C组合键
            {
                e.Handled = true;//屏蔽Ctrl+C组合按键
                MessageBox.

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----

     文件       9216  2016-12-22 03:24  ShieldCtrlV\ShieldCtrlV\bin\Debug\ShieldCtrlV.exe

     文件      44544  2016-12-22 03:24  ShieldCtrlV\ShieldCtrlV\bin\Debug\ShieldCtrlV.pdb

     文件      14328  2016-12-22 03:24  ShieldCtrlV\ShieldCtrlV\bin\Debug\ShieldCtrlV.vshost.exe

     文件        490  2016-12-22 03:24  ShieldCtrlV\ShieldCtrlV\bin\Debug\ShieldCtrlV.vshost.exe.manifest

     文件       1202  2016-12-21 17:47  ShieldCtrlV\ShieldCtrlV\Frm_Main.cs

     文件       3518  2016-12-21 17:47  ShieldCtrlV\ShieldCtrlV\Frm_Main.Designer.cs

     文件       5814  2016-12-21 17:47  ShieldCtrlV\ShieldCtrlV\Frm_Main.resx

     文件       7020  2016-12-22 03:24  ShieldCtrlV\ShieldCtrlV\obj\Debug\DesignTimeResolveAssemblyReferencesInput.cache

     文件       4508  2016-12-22 03:24  ShieldCtrlV\ShieldCtrlV\obj\Debug\ShieldCtrlV.csproj.FileListAbsolute.txt

     文件        908  2016-12-22 03:24  ShieldCtrlV\ShieldCtrlV\obj\Debug\ShieldCtrlV.csproj.GenerateResource.Cache

     文件       9216  2016-12-22 03:24  ShieldCtrlV\ShieldCtrlV\obj\Debug\ShieldCtrlV.exe

     文件        180  2016-12-22 03:24  ShieldCtrlV\ShieldCtrlV\obj\Debug\ShieldCtrlV.Form1.resources

     文件        180  2016-12-22 03:24  ShieldCtrlV\ShieldCtrlV\obj\Debug\ShieldCtrlV.Frm_Main.resources

     文件      44544  2016-12-22 03:24  ShieldCtrlV\ShieldCtrlV\obj\Debug\ShieldCtrlV.pdb

     文件        180  2016-12-22 03:24  ShieldCtrlV\ShieldCtrlV\obj\Debug\ShieldCtrlV.Properties.Resources.resources

     文件       4608  2016-12-22 04:17  ShieldCtrlV\ShieldCtrlV\obj\Debug\TempPE\Properties.Resources.Designer.cs.dll

     文件        495  2016-12-21 17:47  ShieldCtrlV\ShieldCtrlV\Program.cs

     文件       1354  2016-12-21 21:15  ShieldCtrlV\ShieldCtrlV\Properties\AssemblyInfo.cs

     文件       2862  2016-12-21 21:15  ShieldCtrlV\ShieldCtrlV\Properties\Resources.Designer.cs

     文件       5612  2016-12-21 21:15  ShieldCtrlV\ShieldCtrlV\Properties\Resources.resx

     文件       1111  2016-12-21 21:15  ShieldCtrlV\ShieldCtrlV\Properties\Settings.Designer.cs

     文件        249  2016-12-21 21:15  ShieldCtrlV\ShieldCtrlV\Properties\Settings.settings

     文件       4026  2016-12-21 17:47  ShieldCtrlV\ShieldCtrlV\ShieldCtrlV.csproj

     文件        923  2016-12-21 16:09  ShieldCtrlV\ShieldCtrlV.sln

     目录          0  2016-12-22 04:17  ShieldCtrlV\ShieldCtrlV\obj\Debug\Refactor

     目录          0  2016-12-22 04:17  ShieldCtrlV\ShieldCtrlV\obj\Debug\TempPE

     目录          0  2016-12-22 03:24  ShieldCtrlV\ShieldCtrlV\bin\Debug

     目录          0  2016-12-22 03:24  ShieldCtrlV\ShieldCtrlV\bin\Release

     目录          0  2016-12-22 04:17  ShieldCtrlV\ShieldCtrlV\obj\Debug

     目录          0  2016-12-22 03:24  ShieldCtrlV\ShieldCtrlV\bin

............此处省略7个文件信息