int EC_POINT_set_compressed_coordinates_GFp (const EC_GROUP *group, EC_POINT *p, const BIGNUM *x, int y_bit, BN_CTX *ctx);

I just want to set the randomly generated ECDH public key as the X9.62 compressed coordinate of a point over GFp for group P-256 , assuming 0 as the y-bit.

but that randomly generated ECDH public key is in hex string(already converted to some format to hex string)?