ulowsurr

Returns 1 if the Unicode value at "integer_expression" is the low half of a surrogate pair (which should appear second in the pair). Otherwise, it returns 0. This function allows you to explicitly code around the adjustments performed by substr (), stuff (), and right (). Particularly, if a substring ends on a Unicode value where ulowsurr () is true, extract a substring of 1 less characters (or 1 more), since substr () does not extract a string that contains an unmatched surrogate pair.

ulowsurr ( string_expression , integer_expression )