diff --git a/ncurses/base/lib_mvwin.c b/ncurses/base/lib_mvwin.c
new file mode 100644
index 0000000..e4dad4a
--- /dev/null
+++ b/ncurses/base/lib_mvwin.c
@@ -0,0 +1,114 @@
+/****************************************************************************
+ * Copyright (c) 1998-2001,2006 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: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995               *
+ *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         *
+ ****************************************************************************/
+
+/*
+**	lib_mvwin.c
+**
+**	The routine mvwin().
+**
+*/
+
+#include <curses.priv.h>
+
+MODULE_ID("$Id: lib_mvwin.c,v 1.14 2006/02/25 22:53:46 tom Exp $")
+
+NCURSES_EXPORT(int)
+mvwin(WINDOW *win, int by, int bx)
+{
+    T((T_CALLED("mvwin(%p,%d,%d)"), win, by, bx));
+
+    if (!win || (win->_flags & _ISPAD))
+	returnCode(ERR);
+
+    /*
+     * mvwin() should only modify the indices.  See test/demo_menus.c and
+     * test/movewindow.c for examples.
+     */
+#if 0
+    /* Copying subwindows is allowed, but it is expensive... */
+    if (win->_flags & _SUBWIN) {
+	int err = ERR;
+	WINDOW *parent = win->_parent;
+	if (parent) {		/* Now comes the complicated and costly part, you should really
+				 * try to avoid to move subwindows. Because a subwindow shares
+				 * the text buffers with its parent, one can't do a simple
+				 * memmove of the text buffers. One has to create a copy, then
+				 * to relocate the subwindow and then to do a copy.
+				 */
+	    if ((by - parent->_begy == win->_pary) &&
+		(bx - parent->_begx == win->_parx))
+		err = OK;	/* we don't actually move */
+	    else {
+		WINDOW *clone = dupwin(win);
+		if (clone) {
+		    /* now we have the clone, so relocate win */
+
+		    werase(win);	/* Erase the original place     */
+		    /* fill with parents background */
+		    wbkgrnd(win, CHREF(parent->_nc_bkgd));
+		    wsyncup(win);	/* Tell the parent(s)           */
+
+		    err = mvderwin(win,
+				   by - parent->_begy,
+				   bx - parent->_begx);
+		    if (err != ERR) {
+			err = copywin(clone, win,
+				      0, 0, 0, 0, win->_maxy, win->_maxx, 0);
+			if (ERR != err)
+			    wsyncup(win);
+		    }
+		    if (ERR == delwin(clone))
+			err = ERR;
+		}
+	    }
+	}
+	returnCode(err);
+    }
+#endif
+
+    if (by + win->_maxy > screen_lines - 1
+	|| bx + win->_maxx > screen_columns - 1
+	|| by < 0
+	|| bx < 0)
+	returnCode(ERR);
+
+    /*
+     * Whether or not the window is moved, touch the window's contents so
+     * that a following call to 'wrefresh()' will paint the window at the
+     * new location.  This ensures that if the caller has refreshed another
+     * window at the same location, that this one will be displayed.
+     */
+    win->_begy = by;
+    win->_begx = bx;
+    returnCode(touchwin(win));
+}