C#webbrowser How to use a proxy server WinForm

In fact, the use of WebBrowser in C # Everyone should be, the forum also has a lot of examples before you can find out
But the way to set up proxies just like a browser can be a lot of people don't know yet.
This is actually called a DLL file to set,
Now let's see it with me.
First of all, we must first build a structure that is the proxy information structure
As follows

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/// <summary>   /// 代理结构体   /// </summary>   public struct Struct_INTERNET_PROXY_INFO   {       public int dwAccessType;       public IntPtr proxy;//IP以及端口号       public IntPtr proxyBypass;   };

Here's how to set up a specific implementation of the agent

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/// <summary>        /// 设置代理的Api        /// </summary>        /// <returns></returns>        [DllImport("wininet.dll", SetLastError = true)]        private static extern bool InternetSetOption(IntPtr hInternet, int dwOption, IntPtr lpBuffer, int lpdwBufferLength);        /// <summary>        /// 代理IP以及端口号        /// </summary>        /// <param name="strProxy"></param>        private void RefreshIESettings(string strProxy)        {            const int INTERNET_OPTION_PROXY = 38;            const int INTERNET_OPEN_TYPE_PROXY = 3;            Struct_INTERNET_PROXY_INFO struct_IPI;             // Filling in structure             struct_IPI.dwAccessType = INTERNET_OPEN_TYPE_PROXY;            struct_IPI.proxy = Marshal.StringToHGlobalAnsi(strProxy);            struct_IPI.proxyBypass = Marshal.StringToHGlobalAnsi("local");             // Allocating memory             IntPtr intptrStruct = Marshal.AllocCoTaskMem(Marshal.SizeOf(struct_IPI));            // Converting structure to IntPtr             Marshal.StructureToPtr(struct_IPI, intptrStruct, true);             bool iReturn = InternetSetOption(IntPtr.Zero, INTERNET_OPTION_PROXY, intptrStruct, Marshal.SizeOf(struct_IPI));        }

It's very easy to use.

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0102	RefreshIESettings("41.129.53.227:80");webBrowser1.Navigate("http://www.sufeinet.com");

That's all you can do.
All right, everybody, try it yourself.

C#webbrowser How to use a proxy server WinForm