1 public partial class Form1 : Form
2    {
3
4        //用于刷新注册表
 5        [DllImport(@"wininet",
6        SetLastError = true,
7        CharSet = CharSet.Auto,
8        EntryPoint = "InternetSetOption",
9        CallingConvention = CallingConvention.StdCall)]
10
11
12        public static extern bool InternetSetOption
13        (
14        int hInternet,
15        int dmOption,
16        IntPtr lpBuffer,
17        int dwBufferLength
18        );
19
20         private void btnStart_Click(object sender, EventArgs e)
21        {
22            RegistryKey pregkey;
23                pregkey = Registry.CurrentUser.OpenSubKey("Software\\Microsoft\\Windows\\CurrentVersion\\Internet Settings", true);
24                if (pregkey == null)
25                {
26                    Console.WriteLine("键值不存在");
27                }
28                else
29                {
30                    pregkey.SetValue("ProxyEnable", 1);
31                    pregkey.SetValue("ProxyServer", "代理地址");
32                    //激活代理设置
33                    InternetSetOption(0, 39, IntPtr.Zero, 0);
34                    InternetSetOption(0, 37, IntPtr.Zero, 0);
35                    webBrowser1.Navigate(txtweb.Text, false);
36                    // System.Threading.Thread.Sleep(10000);
37                }
38        }
39}