diff --git a/menu/m_sub.c b/menu/m_sub.c
new file mode 100644
index 0000000..82649c5
--- /dev/null
+++ b/menu/m_sub.c
@@ -0,0 +1,86 @@
+/****************************************************************************
+ * Copyright (c) 1998-2003,2004 Free Software Foundation, Inc.              *
+ *                                                                          *
+ * Permission is hereby granted, free of charge, to any person obtaining a  *
+ * copy of this software and associated documentation files (the            *
+ * "Software"), to deal in the Software without restriction, including      *
+ * without limitation the rights to use, copy, modify, merge, publish,      *
+ * distribute, distribute with modifications, sublicense, and/or sell       *
+ * copies of the Software, and to permit persons to whom the Software is    *
+ * furnished to do so, subject to the following conditions:                 *
+ *                                                                          *
+ * The above copyright notice and this permission notice shall be included  *
+ * in all copies or substantial portions of the Software.                   *
+ *                                                                          *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
+ * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
+ * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
+ *                                                                          *
+ * Except as contained in this notice, the name(s) of the above copyright   *
+ * holders shall not be used in advertising or otherwise to promote the     *
+ * sale, use or other dealings in this Software without prior written       *
+ * authorization.                                                           *
+ ****************************************************************************/
+
+/****************************************************************************
+ *   Author:  Juergen Pfeifer, 1995,1997                                    *
+ ****************************************************************************/
+
+/***************************************************************************
+* Module m_sub                                                             *
+* Menus subwindow association routines                                     *
+***************************************************************************/
+
+#include "menu.priv.h"
+
+MODULE_ID("$Id: m_sub.c,v 1.10 2004/12/25 21:38:31 tom Exp $")
+
+/*---------------------------------------------------------------------------
+|   Facility      :  libnmenu  
+|   Function      :  int set_menu_sub(MENU *menu, WINDOW *win)
+|   
+|   Description   :  Sets the subwindow of the menu.
+|
+|   Return Values :  E_OK           - success
+|                    E_POSTED       - menu is already posted
++--------------------------------------------------------------------------*/
+NCURSES_EXPORT(int)
+set_menu_sub(MENU * menu, WINDOW *win)
+{
+  T((T_CALLED("set_menu_sub(%p,%p)"), menu, win));
+
+  if (menu)
+    {
+      if (menu->status & _POSTED)
+	RETURN(E_POSTED);
+      menu->usersub = win;
+      _nc_Calculate_Item_Length_and_Width(menu);
+    }
+  else
+    _nc_Default_Menu.usersub = win;
+
+  RETURN(E_OK);
+}
+
+/*---------------------------------------------------------------------------
+|   Facility      :  libnmenu  
+|   Function      :  WINDOW *menu_sub(const MENU *menu)
+|   
+|   Description   :  Returns a pointer to the subwindow of the menu
+|
+|   Return Values :  NULL on error, otherwise a pointer to the window
++--------------------------------------------------------------------------*/
+NCURSES_EXPORT(WINDOW *)
+menu_sub(const MENU * menu)
+{
+  const MENU *m = Normalize_Menu(menu);
+
+  T((T_CALLED("menu_sub(%p)"), menu));
+  returnWin(Get_Menu_Window(m));
+}
+
+/* m_sub.c ends here */