-extern WINDOW* panel_window(const PANEL *);
-extern void update_panels(void);
-extern int hide_panel(PANEL *);
-extern int show_panel(PANEL *);
-extern int del_panel(PANEL *);
-extern int top_panel(PANEL *);
-extern int bottom_panel(PANEL *);
-extern PANEL* new_panel(WINDOW *);
-extern PANEL* panel_above(const PANEL *);
-extern PANEL* panel_below(const PANEL *);
-extern int set_panel_userptr(PANEL *, NCURSES_CONST void *);
-extern NCURSES_CONST void* panel_userptr(const PANEL *);
-extern int move_panel(PANEL *, int, int);
-extern int replace_panel(PANEL *,WINDOW *);
-extern int panel_hidden(const PANEL *);
+extern NCURSES_EXPORT(WINDOW*) panel_window (const PANEL *);
+extern NCURSES_EXPORT(void) update_panels (void);
+extern NCURSES_EXPORT(int) hide_panel (PANEL *);
+extern NCURSES_EXPORT(int) show_panel (PANEL *);
+extern NCURSES_EXPORT(int) del_panel (PANEL *);
+extern NCURSES_EXPORT(int) top_panel (PANEL *);
+extern NCURSES_EXPORT(int) bottom_panel (PANEL *);
+extern NCURSES_EXPORT(PANEL*) new_panel (WINDOW *);
+extern NCURSES_EXPORT(PANEL*) panel_above (const PANEL *);
+extern NCURSES_EXPORT(PANEL*) panel_below (const PANEL *);
+extern NCURSES_EXPORT(int) set_panel_userptr (PANEL *, NCURSES_CONST void *);
+extern NCURSES_EXPORT(NCURSES_CONST void*) panel_userptr (const PANEL *);
+extern NCURSES_EXPORT(int) move_panel (PANEL *, int, int);
+extern NCURSES_EXPORT(int) replace_panel (PANEL *,WINDOW *);
+extern NCURSES_EXPORT(int) panel_hidden (const PANEL *);
+
+#if NCURSES_SP_FUNCS
+extern NCURSES_EXPORT(PANEL *) ground_panel(SCREEN *);
+extern NCURSES_EXPORT(PANEL *) ceiling_panel(SCREEN *);
+
+extern NCURSES_EXPORT(void) NCURSES_SP_NAME(update_panels) (SCREEN*);
+#endif