VB6 is an advance language too but not like C/C++.
but I am doubt you can hack from that cause hacking is not just VB6 it's lot of languages and your experiences.without knowing how databases work you can't hack a database.
without knowing network concepts you can't hack cause you will get caught or impossible to do, I think even Bachelor Degree holder can't hack properly cause need at least few years experiences unless you can be get caught or hard to do.
I don't know this person said true or not but get a precaution it's better.
if there anyone is who participated in his course in EK, just put his ID here so people can verify that.