IQueryInfo

[ComImport(), Guid("00021500-0000-0000-C000-000000000046"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)] interface IQueryInfo { [PreserveSig] int GetInfoTip( int dwFlags, [MarshalAs( UnmanagedType.LPWStr )] out string ppwszTip );

[PreserveSig] int GetInfoFlags( out int pdwFlags ); }

// ppwszTip will be freed by marshler using CoTaskMemFree()