_BLNKCHAR
(Dstwin->_bkgd != _BLNKCHAR)))) == 0)
#define _WCHAR(w, c) (_CHAR((c) == _BLNKCHAR ? (w)->_bkgd : (c))| \
#define _DARKCHAR(c) ((c) != _BLNKCHAR)
win->_bkgd = _BLNKCHAR;