InternetSetOption은 어떻게 사용합니까?

Question

이 질문은 :

Using Proxy with web browser control

는 "후에 InternetSetOption"를 사용하는 나에게 말했다. 어떻게 사용합니까? 코드로 어떻게 구현할 수 있습니까 (예?)?

감사합니다.

Answer 1

public struct Struct_INTERNET_PROXY_INFO 
{ 
    public int dwAccessType; 
    public IntPtr proxy; 
    public IntPtr proxyBypass; 
} 

[DllImport("wininet.dll", SetLastError = true)] 
private static extern bool InternetSetOption(
    IntPtr hInternet, 
    int dwOption, 
    IntPtr lpBuffer, 
    int lpdwBufferLength); 

private void RefreshIESettings(string strProxy) 
{ 
    const int INTERNET_OPTION_PROXY = 38; 
    const int INTERNET_OPEN_TYPE_PROXY = 3; 

    Struct_INTERNET_PROXY_INFO struct_IPI; 

    struct_IPI.dwAccessType = INTERNET_OPEN_TYPE_PROXY; 
    struct_IPI.proxy = Marshal.StringToHGlobalAnsi(strProxy); 
    struct_IPI.proxyBypass = Marshal.StringToHGlobalAnsi("local"); 

    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)); 
} 

private void Usage() 
{ 
    RefreshIESettings("1.2.3.4:8080"); 
    object nullObject = 0; 
    string strTemp = ""; 
    object nullObjStr = strTemp; 
    axWebBrowser1.Navigate("http://test.com", ref nullObject, ref nullObjStr, ref nullObjStr, ref nullObjStr); 
}