This UDF is intended to improve on the existing _StringProper UDF by using the magic of regular expressions (don't worry, it protects the user from having to know anything about RegEx). In addition to avoiding some of the anomalies associated with _StringProper (such as a cap following each apostrophe--Susan'S Farm), it provides additional functionality: Sentence Case: Only the first word of each sentence (following a period, question mark, exclamation point or colon) is capitalized. Title Case: