namespace Standard { using System; using System.Runtime.InteropServices; [ComImport, Guid("886d8eeb-8cf2-4446-8d02-cdba1dbdcf99"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)] internal interface IPropertyStore { uint GetCount(); Standard.PKEY GetAt(uint iProp); void GetValue([In] ref Standard.PKEY pkey, [In, Out] PROPVARIANT pv); void SetValue([In] ref Standard.PKEY pkey, PROPVARIANT pv); void Commit(); } }