I believe in being honest, but you don't have to tell them if they don't ask. The answer is no, you cannot get employed if you are already depressed, unless you can somehow fake it or trick them into hiring you. No one wants to hire a depressed person, it is just a bad idea for everyone. I'm glad I had enough energy to "fake it" to get the job I have at the time. But now I openly told my supervisor about my depression and she tries to help me. I probably shouldn't have said some of the things I said but I don't really care anymore. But she is super nice and understanding so that helps.