Access 2000 Developer's Handbook, Volumes 1 and 2 (97, 2000, 2002) by Paul Litwin, Ken Getz, Mike Gilbert
Jet Database Engine Programmer's Guide, Second Edition by Dan Haught
VBA Developer's Handbook by Ken Getz and Mike Gilbert
Access 2000 Client Server Solutions by Lars Klander
Microsoft Office 2000 Visual Basic Programmer's Guide (Microsoft Documentation)
Teach Yourself Microsoft SQL Server 2000 in 21 Days by Richard Waymire
Professional SQL Server 2000 Programming by Robert Vieira
Inside Microsoft SQL Server 2000 by Kalen Delaney
Microsoft Visual Basic 6.0 Programmer's Guide (Microsoft Press)
Programming Microsoft Visual Basic 6.0 by Francesco Balena
Enterprise Development using Microsoft Visual Basic 6.0 (Microsoft Mastering Series)
(see the book list from FMS)