Convert C encryption (rijndael) to the VB.NET equivolent

I have written some code in C++ that implements rijndael encryption. I have attached ndkfoo.c which exposes two methods: encrypt and decrypt. Both accept byte arrays along with a key and use this to implement 256 bit rijndael encryption to return an encrypted byte array. I now need this code rewirtten in VB.NET using .NET version 2 in visual studio 2005 as that is the dev environment we have here. The VB.NET version must return the exact same result as the C++ version attached. The VB.NET code will be used to encrypt a byte array and the C++ version must be able to decrypt this, but both versions should be able to perform both tasks. This project will be judged as a failure if the VB.NET version does not return the same results as the C++ version when encrypting and decrypting byte arrays. If you have any question please send me a private message and i will be happy to discuss this. Kind Regards.