One of the major differences between Visual Basic 5 and VB6 was that the help files were no longer distributed with the development environment. Microsoft instead, decided to leverage off the content on the MSDN CDs that shipped in the package. Should you have lost those MSDN discs, you're developing without VB's context-sensitive help — one of it's strongest points.
The last version of the MSDN discs that was compatible with VB6 was the October 2001 edition. Occasionally, if you're lucky, you can find them on eBay.
I've managed to acquire a couple of copies of the VB6 help files from the October 2001 MSDN discs.
If you would like to buy a copy, fill out the form below, and I'll get back to you.