binascii in C++

[Jeremy]

I'm working on a project to create a keyfinder program that finds the 
Windows CD Key in the registry and decodes it.  I prototyped it in 
Python and it worked great but for several reasons I've decided to 
rewrite it in C++.  I use the module binascii extensively in the Python 
version but I can't find an equivalent module in C++.  I'm not a 
professional developer so maybe I'm overlooking something simple.

In particular I'm trying to find an equivalent to the binascii.b2a_hex() 
and binascii.unhexlify() functions.

Thanks,

Jeremy