about ec_point and ec_group

[jazeltq]

hello,
  where can i find the definition of ec_point_st and ec_group_st
what i found are:
typedef struct ec_point_st EC_POINT;
typedef struct ec_group_st
111     /*
112      EC_METHOD *meth;
113      -- field definition
114      -- curve coefficients
115      -- optional generator with associated information (order, cofactor)
116      -- optional extra data (precomputed table for fast computation of 
multiples of generator)
117      -- ASN1 stuff
118     */
119     EC_GROUP;
does anyone know ? thank  you