I have a question on visual basic 6 and need your help

I am making a tiny program to clean up junk files but can't find a good way to remove folders that contains folders and files. I am a beginner and I don't wish to use any API for this.
I want to delete every files individually use the 'kill' function after cleaning up the content of the file.
I am using a DirListBox and a FileListBox to find and remove files and empty folders.

Does anyone know how can I remove folders that contains folders and files? I have been looking for ways to do this using the DirListBox and FileListBox but it is too complicated for me as a beginner. Any helps will be greatly appreciated.