mvwdelch
mvwdelch(WINDOW *win, int y, int x)
#define mvwdelch(w,y,x) (wmove(w,y,x)?ERR:wdelch(w))
#define mvwdelch(w, y, x) \
#undef mvwdelch
mvwdelch(WINDOW *w, int y, int x)
#define mvwdelch(win, y, x) VOID(wmove(win, y, x) == ERR ? \