mvwchgat
#define mvwchgat(w,y,x,n,a,co,p) (wmove(w,y,x)?ERR:wchgat(w,n,a,co,p))
#define mvwchgat(w, y, x, n, a, co, p) \
#undef mvwchgat
mvwchgat(WINDOW *w, int y, int x, int n, attr_t at,