No standards. Do as you like. I wouldn't say that coming up with your own standards would be "useless" but there's no language-specific requirements. Well, there are *are* some, in some very specific circumstances, for naming Subs or html "id=" when working with B4J WebApps (use all lowercase in the HTML but in your B4J code it doesn't matter), for example.
If you're programming in a group, that group should come up with their own best practices.
You're really not restricted. It just comes down to a matter of readability.