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Microsoft KB Archive/171575

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Knowledge Base


FIX: RISC: CByte Doesn't Fail on Negative Values on Native Exe

Article ID: 171575

Article Last Modified on 4/18/2003



APPLIES TO

  • Microsoft Visual Basic 5.0 Enterprise Edition



This article was previously published under Q171575

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:

170365 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:

171554 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: kbbug kbfix kbvbp500sp2fix kbvs97sp2fix KB171575