using?System;
using?System.Collections.Generic;
using?System.ComponentModel;
using?System.Data;
using?System.Drawing;
using?System.Text;
using?System.Windows.Forms;
using?System.Net.NetworkInformation;
using?System.Net.Sockets;
using?System.Net;
using?System.Runtime.InteropServices;
namespace?Ex15_04
{
????public?partial?class?Form1?:?Form
????{
????????public?Form1（）
????????{
????????????InitializeComponent（）;
????????}
????????[DllImport（“wininet.dll“?EntryPoint?=?“InternetGetConnectedState“）]
????????public?extern?static?bool?InternetGetConnectedState（out?int?conState?int?reder）;
????????//參數說明?constate?連接說明?，reder保留值
????????public?bool?IsConnectedToInternet（）
????????{
????????????int?Desc=0;
????????????return?InternetGetConnectedState（out??Desc?0）;
????

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2010-04-06?13:10??Ex15_04\
?????文件?????????910??2007-07-11?11:34??Ex15_04.sln
?????文件???????28672??2007-07-11?11:34??Ex15_04.suo
?????目錄???????????0??2010-04-06?13:10??Ex15_04\bin\
?????目錄???????????0??2010-04-06?13:10??Ex15_04\bin\Debug\
?????文件???????24576??2007-07-11?11:34??Ex15_04\bin\Debug\Ex15_04.exe
?????文件???????24064??2007-07-11?11:34??Ex15_04\bin\Debug\Ex15_04.pdb
?????文件????????5658??2007-07-11?11:34??Ex15_04\bin\Debug\Ex15_04.vshost.exe
?????文件????????3329??2007-07-11?11:34??Ex15_04\Ex15_04.csproj
?????文件????????1314??2007-07-11?11:34??Ex15_04\Form1.cs
?????文件????????3887??2007-07-11?11:34??Ex15_04\Form1.Designer.cs
?????文件????????5814??2007-07-11?11:34??Ex15_04\Form1.resx
?????目錄???????????0??2010-04-06?13:10??Ex15_04\obj\
?????目錄???????????0??2010-04-06?13:10??Ex15_04\obj\Debug\
?????文件?????????877??2007-07-11?11:34??Ex15_04\obj\Debug\Ex15_04.csproj.GenerateResource.Cache
?????文件???????24576??2007-07-11?11:34??Ex15_04\obj\Debug\Ex15_04.exe
?????文件?????????180??2007-07-11?11:34??Ex15_04\obj\Debug\Ex15_04.Form1.resources
?????文件???????24064??2007-07-11?11:34??Ex15_04\obj\Debug\Ex15_04.pdb
?????文件????????4612??2007-07-11?11:34??Ex15_04\obj\Debug\Ex15_04.Properties.Resources.resources
?????目錄???????????0??2010-04-06?13:10??Ex15_04\obj\Debug\TempPE\
?????文件????????4608??2007-07-11?11:34??Ex15_04\obj\Debug\TempPE\Properties.Resources.Designer.cs.dll
?????文件?????????268??2007-07-11?11:34??Ex15_04\obj\Ex15_04.csproj.FileList.txt
?????文件?????????466??2007-07-11?11:34??Ex15_04\Program.cs
?????目錄???????????0??2010-04-06?13:10??Ex15_04\Properties\
?????文件????????1162??2007-07-11?11:34??Ex15_04\Properties\AssemblyInfo.cs
?????文件????????3078??2007-07-11?11:34??Ex15_04\Properties\Resources.Designer.cs
?????文件????????6189??2007-07-11?11:34??Ex15_04\Properties\Resources.resx
?????文件????????1090??2007-07-11?11:34??Ex15_04\Properties\Settings.Designer.cs
?????文件?????????249??2007-07-11?11:34??Ex15_04\Properties\Settings.settings
?????目錄???????????0??2010-04-06?13:10??Ex15_04\Resources\
?????文件????????4150??2007-07-11?11:34??Ex15_04\Resources\1.bmp
............此處省略0個文件信息