[RESOLVED] I Don't Understand The Description Of Removing Registry Keys

I've never worked with the registry before. I understand how to add and read key. section. and value, and how to remove the value and section, but how do you get rid of the key? API call?

I haven't removed the section yet. Do they mean that, if I remove a section, and it is the last section under the key, it will remove the key as well?