Functions based on SM2 Dev Ref Intel Ipp Crypto

Good morning,

I'm trying to use the "Functions based on SM2" for ECIES - encryption and decryption based on eliptic curves. The problem is that i can't find a way to properly initialize an elliptic curve using the encryption scheme (IppsGFpECState). In the Developer Reference for Intel® IPP Cryptography there are two function that seems to be what i need but i can't figured it out how to use them. I'm talking about: GFpECESGetSize_SM2 and GFpECESInit_SM2. With this how can i properly initialize an IppsGFpECState?

Thanks in advance.