C# 实现图片截取

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;
//Download by http://www.haolizi.net
using System.Runtime.InteropServices;

namespace AutoDrawRect
{
    public partial class Form1 : Form
    {
        [DllImport（“user32.dll“）]
        public static extern bool RegisterHotKey（IntPtr hWnd int id int fsModifiers int vk）;
        public const int MOD_ALT = 0x1;
        public const int MOD_CONTROl = 0x2;
        public const int HOTKEY = 0x312;
        [DllImport（“user32.dll“）]
        public static extern bool UnregisterHotKey（IntPtr hWnd int id）;
        
        public Form1（） {
            InitializeComponent（）;
        }
    

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     目录           0  2016-04-07 21:08  AutoDrawRect\
     文件         878  2012-03-06 19:26  AutoDrawRect.sln
     文件        4064  2012-04-22 18:00  AutoDrawRect\AutoDrawRect.csproj
     目录           0  2016-04-07 21:04  AutoDrawRect\bin\
     目录           0  2016-04-07 21:05  AutoDrawRect\bin\Debug\
     文件       24064  2016-04-07 21:08  AutoDrawRect\bin\Debug\AutoDrawRect.exe
     文件       50688  2016-04-07 21:08  AutoDrawRect\bin\Debug\AutoDrawRect.pdb
     文件       23168  2016-04-07 21:04  AutoDrawRect\bin\Debug\AutoDrawRect.vshost.exe
     文件         490  2012-06-02 22:34  AutoDrawRect\bin\Debug\AutoDrawRect.vshost.exe.manifest
     文件        1594  2016-04-07 21:08  AutoDrawRect\Form1.cs
     文件        2076  2012-04-22 16:53  AutoDrawRect\Form1.Designer.cs
     文件        5817  2012-04-22 16:53  AutoDrawRect\Form1.resx
     文件       14412  2016-04-07 21:08  AutoDrawRect\Form2.cs
     文件        6217  2012-04-22 17:25  AutoDrawRect\Form2.Designer.cs
     文件       10634  2012-04-22 17:25  AutoDrawRect\Form2.resx
     文件        6276  2016-04-07 21:08  AutoDrawRect\MouseHook.cs
     目录           0  2016-04-07 21:04  AutoDrawRect\obj\
     目录           0  2016-04-07 21:04  AutoDrawRect\obj\x86\
     目录           0  2016-04-07 21:08  AutoDrawRect\obj\x86\Debug\
     文件        1299  2016-04-07 21:05  AutoDrawRect\obj\x86\Debug\AutoDrawRect.csproj.FileListAbsolute.txt
     文件        1035  2016-04-07 21:05  AutoDrawRect\obj\x86\Debug\AutoDrawRect.csproj.GenerateResource.Cache
     文件        9180  2016-04-07 21:05  AutoDrawRect\obj\x86\Debug\AutoDrawRect.csprojResolveAssemblyReference.cache
     文件       24064  2016-04-07 21:08  AutoDrawRect\obj\x86\Debug\AutoDrawRect.exe
     文件         180  2016-04-07 21:05  AutoDrawRect\obj\x86\Debug\AutoDrawRect.Form1.resources
     文件        3558  2016-04-07 21:05  AutoDrawRect\obj\x86\Debug\AutoDrawRect.Form2.resources
     文件       50688  2016-04-07 21:08  AutoDrawRect\obj\x86\Debug\AutoDrawRect.pdb
     文件         180  2016-04-07 21:05  AutoDrawRect\obj\x86\Debug\AutoDrawRect.Properties.Resources.resources
     文件        2873  2016-04-07 21:06  AutoDrawRect\obj\x86\Debug\DesignTimeResolveAssemblyReferences.cache
     文件        7211  2016-04-07 21:04  AutoDrawRect\obj\x86\Debug\DesignTimeResolveAssemblyReferencesInput.cache
     目录           0  2016-04-07 21:04  AutoDrawRect\obj\x86\Debug\TempPE\
     文件         531  2016-04-07 21:08  AutoDrawRect\Program.cs
............此处省略7个文件信息