Code water thermodynamic properties (enthalpy)

Hi everyone,

I would like to program water thermodynamic properties in C, C++ or Matlab in order to model a steam power plant. I'm particularly interested in getting the enthalpy of the fluid by knowing the temperature and the pressure.

I recently found out the software Cantera (http://code.google.com/p/cantera/), I tried to use it with Matlab and I get an error which is already mentioned in comment on the website many times without answer.

So, I would like to know if someone knows how I could program water thermodynamic properties to solve my problem without buying a software like Refprop. Or maybe someone use Cantera with Windows 7.

Thank you for your time and your help.