a uint, the window
ID of an existing toplevel window.
Remarks
This is meant to embed clients that do not know about
embedding into a Gtk.Socket, however doing
so is inherently unreliable, and using this function is not
recommended.
The Gtk.Socket must have already been added
into a toplevel window before you can make this call.
Requirements
Namespace: Gtk Assembly: gtk-sharp (in gtk-sharp.dll) Since: Gtk# 2.4