public byte GetCharacterCodes()
Public Function GetCharacterCodes As Byte()
Character codes represent raw PDF string that is used to draw the text. They strictly depend on a font and font's encoding in PDF document. An attempt to use character codes with another font can lead to unpredictable result.
Character codes are always ordered according to the visual order. I.e., from left to right for horizontal writing mode.
Use GetCharacters() method to get character codes for individual glyphs.