public ICollection<double> GetCharacterWidths()
Public Function GetCharacterWidths As ICollection(Of Double)
When this method returns null, text string will be drawn using character widths from the Font.
When this method returns not null, this collection must contain the same number of items as the length of the text string to draw. After drawing of each character in the string, DrawString() methods look up a width in this collection and applies extra displacement if needed.