Extending drop down view without physically extending drop down

I'm using Visual Basic 6.0 on windows 2000
I've seen code for this before, but haven't been able to locate it lately. I have a program with a drop down populated from a database. The form I'm using is already a bit busy, so I don't want to extend the physical size of the drop down. I'd like to be able to add code to drop down event that will act somewhat like a "tool tip" and extend the view as the user moves mouse down list of data in drop down. Some of the entries in the database are longer than the length of the drop down.
Thanks for any help.