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diff --git a/otherlibs/labltk/examples_camltk/socketinput.ml b/otherlibs/labltk/examples_camltk/socketinput.ml
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+(***********************************************************************)
+(*                                                                     *)
+(*                 MLTk, Tcl/Tk interface of Objective Caml            *)
+(*                                                                     *)
+(*    Francois Rouaix, Francois Pessaux, Jun Furuse and Pierre Weis    *)
+(*               projet Cristal, INRIA Rocquencourt                    *)
+(*            Jacques Garrigue, Kyoto University RIMS                  *)
+(*                                                                     *)
+(*  Copyright 2002 Institut National de Recherche en Informatique et   *)
+(*  en Automatique and Kyoto University.  All rights reserved.         *)
+(*  This file is distributed under the terms of the GNU Library        *)
+(*  General Public License, with the special exception on linking      *)
+(*  described in file LICENSE found in the Objective Caml source tree. *)
+(*                                                                     *)
+(***********************************************************************)
+open Camltk
+
+let _ =
+  let top_w = opentk () in
+  let text0_w = Text.create top_w [] in
+  let entry0_w = Entry.create top_w [] in
+  let button0_w = Button.create top_w
+                    [Text "Quit"; Command (fun _ -> exit 0)] in
+  let buffer = String.create 256 in
+  let master_socket = Unix.socket Unix.PF_INET Unix.SOCK_STREAM 0 in
+  Unix.bind master_socket (Unix.ADDR_INET(Unix.inet_addr_any, 6789));
+  Unix.listen master_socket 3;
+  print_string "Please connect to port 6789..."; print_newline();
+  let (sock, _) = Unix.accept master_socket in
+  Fileevent.add_fileinput sock
+    (fun _ ->
+      let n = Unix.recv sock buffer 0 (String.length buffer) [] in
+      let txt = String.sub buffer 0 n in
+      Text.insert text0_w (TextIndex (End, [])) txt []);
+  let send _ =
+    let txt = Entry.get entry0_w ^ "\n" in
+    Entry.delete_range entry0_w (At 0) End ;
+    Unix.send sock txt 0 (String.length txt) [];
+    () in
+  bind entry0_w [([], KeyPressDetail "Return")] (BindSet ([], send));
+  pack [text0_w; entry0_w; button0_w][Side Side_Top; Fill Fill_X; Expand true];
+  mainLoop ()
+