I have made an app in Visual Basic that use cryptation to hide database passwords from the user. The encrypted password his hidden in a settings-file, and I use a well-known encryption algorithm. In the code that logs on to the database, I fetch the encrypted password from file and decrypt it using a key. The key is stored inside a string variable.

Now, if anyone can decompile the program they can access my database. That's BAD! What can be done with this problem? Are there decompilers that can decompile VB6? And how about anti-decompilers?

Does anyone know about decompilers that actually work? (Perhaps direct me with a link).
I've found there's easier to find anti-decompilers, so I'll look into that. But I would need a decompiler to see if my anti-decompiler actually works.