In Access 2002, I found the In Clause right where you said
it would be. I found the In Operator in JET SQL reference
section | Overview | SQL Reserved Words.
"In" is a tough one to search for! When I used the search
feature (in Access Visual Basic Help) to search for the
"With" statement, it came right up. But when I searched for
the "In" operator, I was offered a long list of operators,
but "In" wasn't among them.