Returns a CharacterRun object representing a range of characters within the text. Use this to set a font on specified characters within the ChartText object.
(This has no meaning for SeriesDataLabel on a series, only for SeriesDataLabel on a data point.)

 public CharacterRun GetCharacters(int startIndex)

Public Function GetCharacters(ByVal startIndex As Integer) As CharacterRun

The 0-based character position at which to begin the character run.

A CharacterRun object representing a range of characters within the text.