extern void	_xmoveto(Point); struct Cursor;extern void	_xsetcursor(struct Cursor*); struct Mouse;extern void	_xbouncemouse(struct Mouse*); extern int		_xsetlabel(char*);extern Memimage*	_xattach(char*, char*);extern char*		_xgetsnarf(void);extern void		_xputsnarf(char *data);extern void		_xtopwindow(void);extern void		_xresizewindow(Rectangle);