extern NCURSES_EXPORT(char *) _tracechar (int);
extern NCURSES_EXPORT(char *) _tracechtype (chtype);
extern NCURSES_EXPORT(char *) _tracechtype2 (int, chtype);
extern NCURSES_EXPORT(char *) _tracechar (int);
extern NCURSES_EXPORT(char *) _tracechtype (chtype);
extern NCURSES_EXPORT(char *) _tracechtype2 (int, chtype);