我已经使用InternetSetOption和WININET更改Internet Explorer的工作，因为WebBrowser控件使用它太代理设置，但如何添加，以便它可以使用需要认证的代理（用户：通过）？ 这里是我的代码：
Public Structure Struct_INTERNET_PROXY_INFO
Public dwAccessType As Integer
Public proxy As IntPtr
Public proxyBypass As IntPtr
End Structure
Private Sub setProxy(ByVal strProxy As String)
Const INTERNET_OPTION_PROXY As Integer = 38
Const INTERNET_OPEN_TYPE_PROXY As Integer = 3
Dim struct_IPI As Struct_INTERNET_PROXY_INFO
struct_IPI.dwAccessType = INTERNET_OPEN_TYPE_PROXY
struct_IPI.proxy = Marshal.StringToHGlobalAnsi(strProxy)
struct_IPI.proxyBypass = Marshal.StringToHGlobalAnsi("local")
Dim intptrStruct As IntPtr = Marshal.AllocCoTaskMem(Marshal.SizeOf(struct_IPI))
Marshal.StructureToPtr(struct_IPI, intptrStruct, True)
Dim iReturn As Boolean = InternetSetOption(IntPtr.Zero, INTERNET_OPTION_PROXY, intptrStruct, System.Runtime.InteropServices.Marshal.SizeOf(struct_IPI))
End Sub
Private Declare Auto Function InternetSetOption Lib "wininet.dll" (ByVal hInternet As IntPtr, ByVal dwOption As Integer, ByVal lpBuffer As IntPtr, ByVal lpdwBufferLength As Integer) As Boolean
这是我用，每当我想更改代理：
setProxy("ip:port")
所以，我怎么可以添加认证的支持？
