winform用tabcontrol切换mdi子窗口及为tabcontrol的page添加关闭按钮

利用tabcontrol实现winform子窗口切换，且为tabpage添加关闭

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 WinForm
{
    public partial class formBooksManage : Form
    {
        public formBooksManage（）
        {
            InitializeComponent（）;
        }
    }
}

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

     文件     208821  2013-09-04 11:15  WinForm\WinForm\bin\Debug\EAP9 50K3-315-2.dxf

     文件      18432  2013-12-19 15:55  WinForm\WinForm\bin\Debug\WinForm.exe

     文件      40448  2013-12-19 15:55  WinForm\WinForm\bin\Debug\WinForm.pdb

     文件      11600  2013-12-19 15:07  WinForm\WinForm\bin\Debug\WinForm.vshost.exe

     文件     123904  2013-11-11 17:08  WinForm\WinForm\bin\Debug\YFSScaluteClassLibrary.dll

     文件        377  2013-12-19 11:03  WinForm\WinForm\formBooksManage.cs

     文件       2000  2013-12-19 11:03  WinForm\WinForm\formBooksManage.Designer.cs

     文件       5817  2013-12-19 11:03  WinForm\WinForm\formBooksManage.resx

     文件       5278  2013-12-19 15:55  WinForm\WinForm\Main.cs

     文件      11614  2013-12-19 15:54  WinForm\WinForm\Main.Designer.cs

     文件       9927  2013-12-19 15:54  WinForm\WinForm\Main.resx

     文件       4501  2013-08-22 11:46  WinForm\WinForm\obj\x86\Debug\DesignTimeResolveAssemblyReferences.cache

     文件       6341  2013-12-19 15:55  WinForm\WinForm\obj\x86\Debug\DesignTimeResolveAssemblyReferencesInput.cache

     文件        754  2013-12-19 15:55  WinForm\WinForm\obj\x86\Debug\GenerateResource.read.1.tlog

     文件       2442  2013-12-19 15:55  WinForm\WinForm\obj\x86\Debug\GenerateResource.write.1.tlog

     文件      13917  2013-12-19 09:35  WinForm\WinForm\obj\x86\Debug\ResolveAssemblyReference.cache

     文件        741  2013-12-19 15:13  WinForm\WinForm\obj\x86\Debug\WinForm.csproj.FileListAbsolute.txt

     文件      18432  2013-12-19 15:55  WinForm\WinForm\obj\x86\Debug\WinForm.exe

     文件        180  2013-12-19 11:03  WinForm\WinForm\obj\x86\Debug\WinForm.formBooksManage.resources

     文件       2825  2013-12-19 15:55  WinForm\WinForm\obj\x86\Debug\WinForm.Main.resources

     文件      40448  2013-12-19 15:55  WinForm\WinForm\obj\x86\Debug\WinForm.pdb

     文件        180  2013-12-19 10:50  WinForm\WinForm\obj\x86\Debug\WinForm.Properties.Resources.resources

     文件        180  2013-12-19 11:03  WinForm\WinForm\obj\x86\Debug\WinForm.works.resources

     文件        487  2013-12-19 09:32  WinForm\WinForm\Program.cs

     文件       1370  2013-08-22 11:10  WinForm\WinForm\Properties\AssemblyInfo.cs

     文件       2865  2013-08-22 11:10  WinForm\WinForm\Properties\Resources.Designer.cs

     文件       5612  2013-08-22 11:10  WinForm\WinForm\Properties\Resources.resx

     文件       1093  2013-08-22 11:10  WinForm\WinForm\Properties\Settings.Designer.cs

     文件        249  2013-08-22 11:10  WinForm\WinForm\Properties\Settings.settings

     文件       4510  2013-12-19 10:50  WinForm\WinForm\WinForm.csproj

............此处省略18个文件信息