AddAttr
AddAttr(blank, AttrOf(ch));
AddAttr(ch, (a & COLOR_MASK(AttrOf(ch))));
AddAttr(SP_PARM->_slk->attr, attr);
AddAttr(blank, (AttrOf(BCE_BKGD(SP_PARM, win)) & BCE_ATTRS));
AddAttr(thisline[j - k], turnon);
AddAttr(blank, AttrOf(ch));
AddAttr(ch, (a & COLOR_MASK(AttrOf(ch))));