True if the specified object is one of the built-in styles or caption labels in Word. Read-only Boolean.
Remarks
You can specify built-in styles across all languages by using the WdBuiltinStyle constants or within a language by using the style name for the language version of Word. For example, if you specify U.S. English in your Microsoft Office language settings, the following statements are equivalent:
ActiveDocument.Styles(wdStyleHeading1)
ActiveDocument.Styles("Heading 1")