XPL question: offset into a string?

[charles.herold@xxxxxxxx (Charles Herold)]

Is there any way of pulling a substring from a string in XPL by an
offset, rather than using the XS command. That is, if I have the string
"hello there", could I get the "there" into it's own variable just by
knowing that the 't' is offset in by 7 characters? In this particular
case I could use XS to divide the string into what is before and after
the space, but I want to do something far more involved (which I won't
waste your time with). Basically I want the equivalant of Basic's MID$.

Thanks.