upTo x is used to specify a range of values less than or equal to the value x. x can be of any type: Number, Boolean, Currency, Date, Time, DateTime, and String.
Examples
upTo 250
The range of all numbers less than or equal to 250.
upTo CDate (2000, 3, 17)
The range of dates before March 17, 2000, up to and including March 17, 2000.