C# Signature:

/// <summary>
    /// size of the InternetPerConnOptionList struct
    /// </summary>
    public int dwSize;
    /// <summary>
    /// Connection name to set/query options
    /// </summary>
    public IntPtr szConnection;
    /// <summary>
    /// Number of options to set/query
    /// </summary>
    public int dwOptionCount;
    /// <summary>
    /// On error, which option failed
    /// </summary>
    public int dwOptionError;
    public IntPtr options;