The SDK includes: Ø PtImageRW -Image file reading/writing. Ø PtPDF417Encode -PDF417 symbol writing Ø PtPDF417Decode -PDF417 symbol reading. Ø PtQREncode -QR Code symbol writing. Ø PtQRDecode -QR Code symbol reading. Ø PtDMEncode -Data Matrix symbol writing. Ø PtDMDecode -Data Matrix symbol reading. doc