diff --git a/panel/panel.priv.h b/panel/panel.priv.h
new file mode 100644
index 0000000..4fb8144
--- /dev/null
+++ b/panel/panel.priv.h
@@ -0,0 +1,183 @@
+/****************************************************************************
+ * Copyright (c) 1998-2005,2008 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.                                                           *
+ ****************************************************************************/
+
+/* $Id: panel.priv.h,v 1.22 2008/09/27 22:36:11 tom Exp $ */
+
+#ifndef NCURSES_PANEL_PRIV_H
+#define NCURSES_PANEL_PRIV_H 1
+
+#if HAVE_CONFIG_H
+#  include <ncurses_cfg.h>
+#endif
+
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+
+#include "curses.priv.h"
+#include "panel.h"
+#include <nc_panel.h>
+
+#if USE_RCS_IDS
+#  define MODULE_ID(id) static const char Ident[] = id;
+#else
+#  define MODULE_ID(id) /*nothing*/
+#endif
+
+
+#ifdef TRACE
+   extern NCURSES_EXPORT(const char *) _nc_my_visbuf (const void *);
+#  ifdef TRACE_TXT
+#    define USER_PTR(ptr) _nc_visbuf((const char *)ptr)
+#  else
+#    define USER_PTR(ptr) _nc_my_visbuf((const char *)ptr)
+#  endif
+
+#  define returnPanel(code)	TRACE_RETURN(code,panel)
+
+   extern NCURSES_EXPORT(PANEL *) _nc_retrace_panel (PANEL *);
+   extern NCURSES_EXPORT(void) _nc_dPanel (const char*, const PANEL*);
+   extern NCURSES_EXPORT(void) _nc_dStack (const char*, int, const PANEL*);
+   extern NCURSES_EXPORT(void) _nc_Wnoutrefresh (const PANEL*);
+   extern NCURSES_EXPORT(void) _nc_Touchpan (const PANEL*);
+   extern NCURSES_EXPORT(void) _nc_Touchline (const PANEL*, int, int);
+
+#  define dBug(x) _tracef x
+#  define dPanel(text,pan) _nc_dPanel(text,pan)
+#  define dStack(fmt,num,pan) _nc_dStack(fmt,num,pan)
+#  define Wnoutrefresh(pan) _nc_Wnoutrefresh(pan)
+#  define Touchpan(pan) _nc_Touchpan(pan)
+#  define Touchline(pan,start,count) _nc_Touchline(pan,start,count)
+#else /* !TRACE */
+#  define returnPanel(code)	return code
+#  define dBug(x)
+#  define dPanel(text,pan)
+#  define dStack(fmt,num,pan)
+#  define Wnoutrefresh(pan) wnoutrefresh((pan)->win)
+#  define Touchpan(pan) touchwin((pan)->win)
+#  define Touchline(pan,start,count) touchline((pan)->win,start,count)
+#endif
+
+#define _nc_stdscr_pseudo_panel _nc_panelhook()->stdscr_pseudo_panel
+#define _nc_top_panel _nc_panelhook()->top_panel
+#define _nc_bottom_panel _nc_panelhook()->bottom_panel
+
+#define EMPTY_STACK() (_nc_top_panel==_nc_bottom_panel)
+#define Is_Bottom(p)  (((p)!=(PANEL*)0) && !EMPTY_STACK() && (_nc_bottom_panel->above==(p)))
+#define Is_Top(p) (((p)!=(PANEL*)0) && !EMPTY_STACK() && (_nc_top_panel==(p)))
+#define Is_Pseudo(p) ((p) && ((p)==_nc_bottom_panel))
+
+/*+-------------------------------------------------------------------------
+	IS_LINKED(pan) - check to see if panel is in the stack
+--------------------------------------------------------------------------*/
+/* This works! The only case where it would fail is, when the list has
+   only one element. But this could only be the pseudo panel at the bottom */
+#define IS_LINKED(p) (((p)->above || (p)->below ||((p)==_nc_bottom_panel)) ? TRUE : FALSE)
+
+#define PSTARTX(pan) ((pan)->win->_begx)
+#define PENDX(pan)   ((pan)->win->_begx + getmaxx((pan)->win) - 1)
+#define PSTARTY(pan) ((pan)->win->_begy)
+#define PENDY(pan)   ((pan)->win->_begy + getmaxy((pan)->win) - 1)
+
+/*+-------------------------------------------------------------------------
+	PANELS_OVERLAPPED(pan1,pan2) - check panel overlapped
+---------------------------------------------------------------------------*/
+#define PANELS_OVERLAPPED(pan1,pan2) \
+(( !(pan1) || !(pan2) || \
+       PSTARTY(pan1) > PENDY(pan2) || PENDY(pan1) < PSTARTY(pan2) ||\
+       PSTARTX(pan1) > PENDX(pan2) || PENDX(pan1) < PSTARTX(pan2) ) \
+     ? FALSE : TRUE)
+
+
+/*+-------------------------------------------------------------------------
+	Compute the intersection rectangle of two overlapping rectangles
+---------------------------------------------------------------------------*/
+#define COMPUTE_INTERSECTION(pan1,pan2,ix1,ix2,iy1,iy2)\
+   ix1 = (PSTARTX(pan1) < PSTARTX(pan2)) ? PSTARTX(pan2) : PSTARTX(pan1);\
+   ix2 = (PENDX(pan1)   < PENDX(pan2))   ? PENDX(pan1)   : PENDX(pan2);\
+   iy1 = (PSTARTY(pan1) < PSTARTY(pan2)) ? PSTARTY(pan2) : PSTARTY(pan1);\
+   iy2 = (PENDY(pan1)   < PENDY(pan2))   ? PENDY(pan1)   : PENDY(pan2);\
+   assert((ix1<=ix2) && (iy1<=iy2));\
+
+
+/*+-------------------------------------------------------------------------
+	Walk through the panel stack starting at the given location and
+        check for intersections; overlapping panels are "touched", so they
+        are incrementally overwriting cells that should be hidden.
+        If the "touch" flag is set, the panel gets touched before it is
+        updated.
+---------------------------------------------------------------------------*/
+#define PANEL_UPDATE(pan,panstart)\
+{  PANEL* pan2 = ((panstart) ? (panstart) : _nc_bottom_panel);\
+   while(pan2) {\
+      if ((pan2 != pan) && PANELS_OVERLAPPED(pan,pan2)) {\
+        int y,ix1,ix2,iy1,iy2;\
+        COMPUTE_INTERSECTION(pan,pan2,ix1,ix2,iy1,iy2);\
+	for(y = iy1; y <= iy2; y++) {\
+	  if (is_linetouched(pan->win,y - PSTARTY(pan))) {\
+            struct ldat* line = &(pan2->win->_line[y - PSTARTY(pan2)]);\
+            CHANGED_RANGE(line,ix1-PSTARTX(pan2),ix2-PSTARTX(pan2));\
+          }\
+	}\
+      }\
+      pan2 = pan2->above;\
+   }\
+}
+
+/*+-------------------------------------------------------------------------
+	Remove panel from stack.
+---------------------------------------------------------------------------*/
+#define PANEL_UNLINK(pan,err) \
+{  err = ERR;\
+   if (pan) {\
+     if (IS_LINKED(pan)) {\
+       if ((pan)->below)\
+         (pan)->below->above = (pan)->above;\
+       if ((pan)->above)\
+         (pan)->above->below = (pan)->below;\
+       if ((pan) == _nc_bottom_panel) \
+         _nc_bottom_panel = (pan)->above;\
+       if ((pan) == _nc_top_panel) \
+         _nc_top_panel = (pan)->below;\
+       err = OK;\
+     }\
+     (pan)->above = (pan)->below = (PANEL*)0;\
+   }\
+}
+
+#define HIDE_PANEL(pan,err,err_if_unlinked)\
+  if (IS_LINKED(pan)) {\
+    Touchpan(pan);\
+    PANEL_UPDATE(pan,(PANEL*)0);\
+    PANEL_UNLINK(pan,err);\
+  } \
+  else {\
+      err = err_if_unlinked;\
+  }
+
+#endif /* NCURSES_PANEL_PRIV_H */