Adds an event filter to this window, allowing you to intercept events
before they reach GDK. This is a low-level operation and makes it
easy to break GDK and/or GTK+, so you have to know what you're
doing. Pass null for this window to get all events
for all windows, instead of events for a specific window.
- A Gdk.FilterFunc
Assembly: gdk-sharp (in gdk-sharp.dll)