bottom_line
#define status_line(str1, str2) bottom_line(ON, (str1), (str2), NIL_PTR, FALSE)
#define error(str1, str2) bottom_line(ON, (str1), (str2), NIL_PTR, FALSE)
#define get_string(str1,str2, fl) bottom_line(ON, (str1), NIL_PTR, (str2), fl)
#define clear_status() bottom_line(OFF, NIL_PTR, NIL_PTR, \
int bottom_line(FLAG revfl, const char *s1, const char *s2, char *inbuf, FLAG statfl);