clearok
clearok(stdscr,1);
clearok(stdscr,0);
extern int clearok(WINDOW *, bool);
#define wclear(w) (clearok(w,1)?ERR:werase(w))
value = clearok(__m_screen->_newscr, TRUE);
extern int clearok(WINDOW *, bool);
(clearok(__w1 = (w), 1) ? ERR : werase(__w1))
value = clearok(__m_screen->_newscr, TRUE);
(void) clearok(curscr, TRUE);
clearok(curscr, TRUE);