gdk-sharpGtk# is thread aware, but not thread safe; See the Gtk# Thread Programming for details.System.EnumGLib.GType(typeof(Gdk.FilterReturnGType))Specifies the result of applying a to a native event.None.FieldGdk.FilterReturnEvent not handled, continue processing.FieldGdk.FilterReturnEvent handled, terminate processing.FieldGdk.FilterReturnNative event translated into a GDK event and tored in the event structure that was passed in.