Schneider, David I. An introduction to programming using Visual Basic 6.0 / David I. Schneider. - 4th ed. - Upper Saddle River, NJ : Prentice Hall, c1999. - xiii, 813 p. : ill. ; 28 cm. + 1 computer laser optical disc (4 3/4 in.) Includes index. ISBN: 0139364285 LCCN: 98050216 LC Class. No.: QA76.73.B3 / S3335 1999 Dewey Class. No.: 005.26/8