COleVariant Constructor Does Not Correctly Initialize Its Members (319660)


The information in this article applies to:

  • The Microsoft Foundation Classes (MFC), when used with:
    • Microsoft Visual C++ .NET (2002)
This article was previously published under Q319660

SYMPTOMS

The COleVariant constructor, COleVariant(long lSrc, VARTYPE vtSrc = VT_I4), does not correctly initialize its members. As a result, when you call the CDaoTableDef::CreateField member function, you receive a CDaoException exception with the following call stack: 

KERNEL32.DLL!RaiseException
msvcr70.dll!_CxxThrowException
DaoBug.exe!AfxThrowDaoException
DaoBug.exe!AfxDaoCheck
DaoBug.exe!CDaoTableDef::CreateField

CAUSE

This problem occurs because the constructor initializes members based on an uninitialized member. As a result, the vt member of COleVariant may be initialized to the VT_UI4 or the VT_HRESULT variant type instead of the VT_I4 variant type.

RESOLUTION

A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next Microsoft Visual Studio .NET service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the fix. For a complete list of Microsoft Product Support Services phone numbers and information about support costs, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

NOTE: In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The typical support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

The English version of this fix should have the following file attributes or later: 
   Date         Time    Version        Size     File name   Platform
   ---------------------------------------------------------------
   26-Mar-2002  10:04   7.00.9480.0    974,848  Mfc70.dll   x86
   26-Mar-2002  09:19   7.00.9480.0  1,933,312  Mfc70d.dll  x86
   26-Mar-2002  09:53   7.00.9480.0    964,608  Mfc70u.dll  x86
   26-Mar-2002  09:22   7.00.9480.0  1,927,680  Mfc70ud.dll x86
   28-Mar-2002  06:01   none           850,944  VC_MFC.msm  none

STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.
Modification Type:MinorLast Reviewed:10/11/2005
Keywords:kbHotfixServer kbQFE kbbug kbfix kbQFE KB319660
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