namespace System.Web.Services.Interop { using System; using System.Threading; using System.Runtime.InteropServices; [ComImport(), Guid("26E7F0F1-B49C-48cb-B43E-78DCD577E1D9"), InterfaceTypeAttribute(ComInterfaceType.InterfaceIsIUnknown)] internal interface INotifySource2 { void SetNotifyFilter( [In] NotifyFilter in_NotifyFilter, [In] UserThread in_pUserThreadFilter); } }