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