Encoding

Encoding is very simple, say we had some data 'pData'
that was of length 'dwLen', that we wished to encode
and store in 'pData2' which is of length 'dwLen'*2,
then

   #include "hex.h" // from crypto++ library

   HexEncoder hexEncoder;
   hexEncoder.Put(pData,dwLen);
   hexEncoder.MessageEnd();
   hexEncoder.Get(pData2,dwLen*2);

And there we have it. It is also possible to add multiple blocks of data to the
encoders stream i.e.

   HexEncoder hexEncoder;
   hexEncoder.Put(pDataA,dwLenA);
   hexEncoder.Put(pDataB,dwLenB);
   hexEncoder.Put(pDataC,dwLenC);
   hexEncoder.MessageEnd();
   hexEncoder.Get(pData2,(dwLenA+dwLenB+dwLenC)*2);


Decoding

Decoding is equally simple.

   HexDecoder hexDecoder;
   hexDecoder.Put(pData,dwLen);
   hexDecoder.MessageEnd();
   hexDecoder.Get(pData2,dwLen/2);