C# 获取组合键

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

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

        private void textBox1_KeyDown（object sender KeyEventArgs e）
        {
            if （（e.Control == true） && （e.KeyCode == Keys.A））//判断是否按下了Ctrl+A组合键
            {
                MessageBox.Show（“您按下组合键Ctrl+A“）;
            }
        }
    }
}

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

     文件       8704  2016-12-22 03:31  GetGroupKey\GetGroupKey\bin\Debug\GetGroupKey.exe

     文件      28160  2016-12-22 03:31  GetGroupKey\GetGroupKey\bin\Debug\GetGroupKey.pdb

     文件      14328  2016-12-22 03:31  GetGroupKey\GetGroupKey\bin\Debug\GetGroupKey.vshost.exe

     文件        490  2016-12-22 03:31  GetGroupKey\GetGroupKey\bin\Debug\GetGroupKey.vshost.exe.manifest

     文件        632  2016-12-21 17:48  GetGroupKey\GetGroupKey\Frm_Main.cs

     文件       2655  2016-12-21 17:48  GetGroupKey\GetGroupKey\Frm_Main.designer.cs

     文件       5814  2016-12-21 17:48  GetGroupKey\GetGroupKey\Frm_Main.resx

     文件       3991  2016-12-21 17:48  GetGroupKey\GetGroupKey\GetGroupKey.csproj

     文件       7020  2016-12-22 03:31  GetGroupKey\GetGroupKey\obj\Debug\DesignTimeResolveAssemblyReferencesInput.cache

     文件       1961  2016-12-22 03:31  GetGroupKey\GetGroupKey\obj\Debug\GetGroupKey.csproj.FileListAbsolute.txt

     文件        850  2016-12-22 03:31  GetGroupKey\GetGroupKey\obj\Debug\GetGroupKey.csproj.GenerateResource.Cache

     文件       8704  2016-12-22 03:31  GetGroupKey\GetGroupKey\obj\Debug\GetGroupKey.exe

     文件        180  2016-12-22 03:31  GetGroupKey\GetGroupKey\obj\Debug\GetGroupKey.Frm_Main.resources

     文件      28160  2016-12-22 03:31  GetGroupKey\GetGroupKey\obj\Debug\GetGroupKey.pdb

     文件        180  2016-12-22 03:31  GetGroupKey\GetGroupKey\obj\Debug\GetGroupKey.Properties.Resources.resources

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

     文件        495  2016-12-21 17:48  GetGroupKey\GetGroupKey\Program.cs

     文件       1354  2016-12-21 21:16  GetGroupKey\GetGroupKey\Properties\AssemblyInfo.cs

     文件       2862  2016-12-21 21:16  GetGroupKey\GetGroupKey\Properties\Resources.Designer.cs

     文件       5612  2016-12-21 21:16  GetGroupKey\GetGroupKey\Properties\Resources.resx

     文件       1111  2016-12-21 21:16  GetGroupKey\GetGroupKey\Properties\Settings.Designer.cs

     文件        249  2016-12-21 21:16  GetGroupKey\GetGroupKey\Properties\Settings.settings

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

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

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

     目录          0  2016-12-22 03:31  GetGroupKey\GetGroupKey\bin\Debug

     目录          0  2016-12-22 03:31  GetGroupKey\GetGroupKey\bin\Release

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

     目录          0  2016-12-22 03:31  GetGroupKey\GetGroupKey\bin

     目录          0  2016-12-22 03:31  GetGroupKey\GetGroupKey\obj

............此处省略6个文件信息