using?System;
using?System.Collections.Generic;
using?System.ComponentModel;
using?System.Linq;
using?System.Runtime.InteropServices;
using?System.Text;

namespace?test
{
????public?class?Proxies
????{
????????public?static?bool?UnsetProxy（）
????????{
????????????return?SetProxy（null?null）;
????????}
????????public?static?bool?SetProxy（string?strProxy）
????????{
????????????return?SetProxy（strProxy?null）;
????????}

????????public?static?bool?SetProxy（string?strProxy?string?exceptions）
????????{
????????????InternetPerConnOptionList?list?=?new?InternetPerConnOptionList（）;

????????????int?optionCount?=?string.IsNullOrEmpty（strProxy）???1?:?（string.IsNullOrEmpty（exceptions）???2?:?3）;
????????????InternetPerConnOption[]?options?=?new?InternetPerConnOption[optionCount];
????????????//not?use?or?use?proxy?server
????????????options[0].m_Option?=?PerConnOption.INTERNET_PER_CONN_FLAGS;
????????????options[0].m_Value.m_Int?=?（int）（（optionCount?????????????//proxy?server
????????????if?（optionCount?>?1）
????????????{
????????????????options[1].m_Option?=?PerConnOption.INTERNET_PER_CONN_PROXY_SERVER;
????????????????options[1].m_Value.m_StringPtr?=?Marshal.StringToHGlobalAuto（strProxy）;
????????????????//except?for?these?addresses?...
????????????????if?（optionCount?>?2）
????????????????{
????????????????????options[2].m_Option?=?PerConnOption.INTERNET_PER_CONN_PROXY_BYPASS;
????????????????????options[2].m_Value.m_StringPtr?=?Marshal.StringToHGlobalAuto（exceptions）;
????????????????}
????????????}

????????????//?default?stuff
????????????list.dwSize?=?Marshal.SizeOf（list）;
????????????list.pszConnection?=?IntPtr.Zero;
????????????list.dwOptionCount?=?options.Length;
????????????list.dwOptionerror?=?0;

????????????int?optSize?=?Marshal.SizeOf（typeof（InternetPerConnOption））;
????????????//?make?a?pointer?out?of?all?that?...
????????????IntPtr?optionsPtr?=?Marshal.AllocCoTaskMem（optSize?*?options.Length）;
????????????//?copy?the?array?over?into?that?spot?in?memory?...
????????????for?（int?j?=?0;?j?????????????{
????????????????IntPtr?opt?=?new?IntPtr（optionsPtr.ToInt32（）?+?（j?*?optSize））;
????????????????Marshal.StructureToPtr（options[j]?opt?false）;
????????????}

????????????list.pOptions?=?optionsPtr;

????????????//?and?then?make?a?pointer?out?of?the?whole?list
????????????IntPtr?ipcoListPtr?=?Marshal.AllocCoTaskMem（（Int32）list.dwSize）;
????????????Marshal.StructureToPtr（list?ipcoListPtr?false）;

????????????//?and?finally?call?the?API?method!
????????????int?returnvalue?=?NativeMethods.InternetSetOption（IntPtr.Zero
???????????????InternetOption.INTERNET_OPTION_PER_CONNECTION_OPTION
???????????????ipcoListPtr?list.dwSize）???-1?:?0;
????????????if?（returnvalue?==?0）
????????????{??//?get?the?error?codes?they?might?be?helpful
????????????????retur

?屬性????????????大小?????日期????時(shí)間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2017-05-03?16:09??test\
?????文件????????8108??2017-04-27?15:54??test\Class1.cs
?????文件????????4972??2017-05-02?15:33??test\Form1.Designer.cs
?????文件????????1520??2017-05-03?15:41??test\Form1.cs
?????文件????????5817??2017-05-02?15:33??test\Form1.resx
?????文件????????2022??2017-05-02?15:33??test\Form2.Designer.cs
?????文件????????1742??2017-05-02?16:17??test\Form2.cs
?????文件????????5817??2017-05-02?15:33??test\Form2.resx
?????文件?????????485??2017-04-27?14:44??test\Program.cs
?????目錄???????????0??2017-04-27?14:44??test\Properties\
?????文件????????1328??2017-04-27?14:44??test\Properties\AssemblyInfo.cs
?????文件????????2860??2017-04-27?14:44??test\Properties\Resources.Designer.cs
?????文件????????5612??2017-04-27?14:44??test\Properties\Resources.resx
?????文件????????1091??2017-04-27?14:44??test\Properties\Settings.Designer.cs
?????文件?????????249??2017-04-27?14:44??test\Properties\Settings.settings
?????目錄???????????0??2017-04-27?14:44??test\bin\
?????目錄???????????0??2017-05-02?11:50??test\bin\Debug\
?????文件???????27648??2015-08-18?16:24??test\bin\Debug\HttpHelper.dll
?????文件???????13824??2017-05-03?15:41??test\bin\Debug\test.exe
?????文件???????34304??2017-05-03?15:41??test\bin\Debug\test.pdb
?????文件???????22472??2017-05-03?15:56??test\bin\Debug\test.vshost.exe
?????文件?????????490??2010-03-17?22:39??test\bin\Debug\test.vshost.exe.manifest
?????文件????????8704??2017-05-02?15:22??test\bin\Debug\test1.exe
?????目錄???????????0??2017-04-27?14:44??test\obj\
?????目錄???????????0??2017-05-03?15:41??test\obj\Debug\
?????文件????????1451??2017-04-27?20:56??test\obj\Debug\DesignTimeResolveAssemblyReferences.cache
?????文件????????6969??2017-05-03?16:09??test\obj\Debug\DesignTimeResolveAssemblyReferencesInput.cache
?????目錄???????????0??2018-02-26?17:22??test\obj\Debug\TempPE\
?????文件?????????180??2017-05-02?15:33??test\obj\Debug\test.Form1.resources
?????文件?????????180??2017-05-02?15:33??test\obj\Debug\test.Form2.resources
?????文件?????????180??2017-04-27?21:34??test\obj\Debug\test.Properties.Resources.resources
............此處省略38個(gè)文件信息