Error : uses undefined struct 'asn1_object_st'

[DOpenssl]

I am compiling OpenSSL1.1.1 with Visual Studio 2017 on windows 10.
I am using below code in my .cpp file
#include <openssl/ossl_typ.h>
func(){
ASN1_OBJECT obj;
}

I am getting error:

error C2079: 'obj' uses undefined struct 'asn1_object_st'

I have included "openssl/ossl_typ.h" in my file.

I am giving openssl "-IC:\openssl-1.1.1w\include" option to "cl" command

Please let me know how to fix above compilation error..

[t8m]

You cannot declare the ASN1_OBJECT as local variable. You have to allocate it on heap via functions from OpenSSL that create it and pass just pointers to it.