/// <param name="pProxyInfo">A pointer to a WINHTTP_PROXY_INFO structure that receives the proxy setting. This structure is then applied to the request handle using the WINHTTP_OPTION_PROXY option.</param>

public static extern bool WinHttpGetProxyForUrl(IntPtr hSession, string lpcwszUrl, ref WINHTTP_AUTOPROXY_OPTIONS pAutoProxyOptions, ref WINHTTP_PROXY_INFO pProxyInfo);