Retrieves the story index of the unit parameter at the specified range start character position. The first unit in a story has an index value of 1. The index of a Unit is the same for all character positions from that immediately preceding the unit up to the last character in the unit.

public int GetIndex(
	TextUnit unit
)

Public Function GetIndex ( 
	unit As TextUnit
) As Integer

public:
int GetIndex(
	TextUnit unit
)