__BLANK
ch |= __BLANK;
attr |= __BLANK;
if (attr & __BLANK && t_enter_secure_mode(t) != NULL)
win->wattr |= __BLANK;
if (attr & __BLANK)
win->wattr &= ~__BLANK;
_cursesi_screen->nca |= __BLANK;
#define A_BLANK __BLANK
#define A_INVIS __BLANK
#define WA_INVIS __BLANK /* Invisible */
(__REVERSE | __BLINK | __DIM | __BOLD | __BLANK | __PROTECT)
(__REVERSE | __BLINK | __DIM | __BOLD | __BLANK | __PROTECT \
if (on & __BLANK && enter_secure_mode != NULL)
curscr->wattr |= __BLANK;