如何将这个函数从inet.dll导入到.NET中？

Question

我从来没有这样做过，而且我对如何将数据类型转换为C＃很困惑。这里是function I'm trying to import：

BOOL InternetSetOption(
    __in HINTERNET hInternet, 
    __in DWORD dwOption, 
    __in LPVOID lpBuffer, 
    __in DWORD dwBufferLength 
); 

所有我想要做的是设置在WebBrowser控制代理设置。我将这些映射到C＃中的数据类型是什么？

Answer 1

查看http://pinvoke.net的文档和示例代码。

Answer 2

试试下面的签名

public partial class NativeMethods { 

    /// Return Type: BOOL->int 
    ///hInternet: void* 
    ///dwOption: DWORD->unsigned int 
    ///lpBuffer: LPVOID->void* 
    ///dwBufferLength: DWORD->unsigned int 
    [System.Runtime.InteropServices.DllImportAttribute("<Unknown>", EntryPoint="InternetSetOption")] 
    [return: System.Runtime.InteropServices.MarshalAsAttribute(System.Runtime.InteropServices.UnmanagedType.Bool)] 
public static extern bool InternetSetOption([System.Runtime.InteropServices.InAttribute()] System.IntPtr hInternet, uint dwOption, [System.Runtime.InteropServices.InAttribute()] System.IntPtr lpBuffer, uint dwBufferLength) ; 

} 

Answer 3

的PInvoke page为InternetSetOption函数指定它怎么可以声明，与一些方便的示例代码。单独

的声明将是以下几点：

public 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);