Advanced Microsoft Visual Basic 6.0 2nd edition by Sean P. Alexander (Foreword)

By Sean P. Alexander (Foreword)

Within the authors' phrases, "Our major target in penning this publication is to write down the main complicated booklet but to be had on Microsoft visible Basic." Written from the point of view of the pro visible easy developer, "Advanced Microsoft visible simple, 2d version" explores all of the probabilities open to a developer utilizing visible easy as his or her fundamental client/server improvement device. New to this version is fabric on new facts entry applied sciences, accessibility concerns for the bodily challenged, elevated aid for IIS, BackOffice and combined language programming, and company aid for server facet gadgets, comparable to the part gallery and Microsoft Transaction Server. The accompanying CD-ROM comprises pattern code and useful utilities built and confirmed through the authors, The Mandelbrot Set.

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Extra info for Advanced Microsoft Visual Basic 6.0 2nd edition

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The error handler might raise errors. It doesn't handle errors occurring in the error handler. It uses a local subroutine, PreserveContext. This subroutine is called only from within this routine, so we use a GoSub to create it. The result is that PreserveContext is truly private and fast—and it doesn't pollute the global name space. (This routine preserves the key values found in the error object. ) Within bDriveExists, I've chosen to flag parameter errors and send the information back to the caller by using exceptions.

See notes later on ' subclassing VBA's error object and adding your own "push" ' and "pop" methods to do this. GoSub PreserveContext ' ** ' In error; roll back stuff in here. ' ** ' ** ' Log error. ' ** ' Reraise as appropriate - handle internal errors ' further only. Raise lErr Else ' Ask the user what he or she wants to do with this ' error. Description Return End Function Here are a few comments on this routine: Although it's a fabricated example, I've tried to make sure that it works and is complete.

2. BASIC (Computer program language) I. Mandelbrot Set (International) Limited. II. Title: Advanced Microsoft Visual Basic 5. 26'8--dc21 98-42530 CIP Printed and bound in the United States of America. 1 2 3 4 5 6 7 8 9 WCWC 3 2 1 0 9 8 Distributed in Canada by Penguin Books Canada Limited. A CIP catalogue record for this book is available from the British Library. Microsoft Press books are available through booksellers and distributors worldwide. For further information about international editions, contact your local Microsoft Corporation office or contact Microsoft Press International directly at fax (425) 936-7329.

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