(void) wbkgrndset(win, CHREF(new_bkgd));
(void) wattrset(win, (int) AttrOf(win->_nc_bkgd));
for (y = 0; y <= win->_maxy; y++) {
(void) wbkgrndset(win, CHREF(new_bkgd));
(void) wattrset(win, (int) AttrOf(win->_nc_bkgd));
for (y = 0; y <= win->_maxy; y++) {