Thats a bad way to do it. You assume everyone uses fixedsys. Thats not the case. Only ASCII characters from 0 through 127 have standard representations. Any character above 127 is an implementation specific character so you can not be guaranteed that it is a space-like character. And btw, why would you type $asc(alt+0160)? If you knew to type alt+0160, then you already know the number of the character, 160.
