DOCUMENT:Q171575  05-SEP-1997  [vbwin]
TITLE   :FIX: RISC: CByte Doesn't Fail on Negative Values on  Native Exe
PRODUCT :Microsoft Visual Basic for Windows
PROD/VER:5.0
OPER/SYS:NT WINDOWS
KEYWORDS:vb5all VS97FixlistSP2 VB5FixlistSP2

======================================================================
------------------------------------------------------------------
---
The information in this article applies to:

 - Microsoft Visual Basic Enterprise Edition for Windows, version
5.0
 - Microsoft Visual Studio, Enterprise Edition 97
 -----------------------------------------------------------------
----

SYMPTOMS
========

In a native executable, passing a negative value to the CByte
function does
not generate an error. It should cause an Overflow error.

STATUS
======

Microsoft has confirmed this to be a bug in the Microsoft products
listed
at the beginning of this article. This bug has been corrected in
the RISC
version of Visual Studio 97 Service Pack 2.

For more information on the Visual Studio 97 Service Pack 2,
please see the
following article in the Microsoft Knowledge Base:

   ARTICLE-ID: Q170365
   TITLE     : INFO: Visual Studio 97 Service Packs - What, Where,
and Why

For a list of the Visual Basic 5.0 bugs that were fixed in the
Visual
Studio 97 Service Pack 2, please see the following article in the
Microsoft
Knowledge Base:

   ARTICLE-ID: Q171554
   TITLE     : INFO: Visual Basic 5.0 Fixes in Visual Studio 97
               Service Pack 2

MORE INFORMATION
================

This problem does not occur in the IDE or in PCode executables.
This
problem does not occur in the Intel version of the product
regardless of
how the application is compiled.

Once the RISC version of Service Pack 2 is installed, code such
as:

   Dim b as Byte
   b = CByte(-2)

correctly results in an Overflow error regardless of how the
application is
compiled.
======================================================================
Keywords          : vb5all VS97FixlistSP2 VB5FixlistSP2
Version           : 5.0
Platform          : NT WINDOWS
Issue type        : kbbug
Solution Type     : kbfix

=============================================================================

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Copyright Microsoft Corporation 1997.