FIX: CString::MakeUpper and MakeLower Don't Work with Extended Characters (169484)
The information in this article applies to:
- The Microsoft Foundation Classes (MFC), when used with:
- Microsoft Visual C++, 32-bit Enterprise Edition 5.0
- Microsoft Visual C++, 32-bit Professional Edition 5.0
- Microsoft Visual Studio 97
This article was previously published under Q169484 SYMPTOMS
MakeUpper() and MakeLower() in Visual C++ 5.0 do not convert the extended
characters, such as ,,.
CAUSE
MakeUpper() and MakeLower() were working correctly with the extended
characters in Visual C++ 4.0, but not in Visual C++ 5.0. In Visual C++ 4.0,
CString::MakeUpper() and MakeLower() functions are wrappers for the SDK
functions CharUpper() and CharLower(). They work correctly for the extended
characters, such as [ASCII 197],[ASCII 196],[ASCII 214]. In Visual C++ 5.0, the MakeUpper() and
MakeLower() functions use the C Runtime _tcslwr and _tcsupr to convert the
characters, instead of CharUpper and CharLower. As a result, the extended
characters are not being converted anymore.
RESOLUTION
This problem can be avoided by using the SDK APIs CharUpper() and
CharLower() instead of the CString functions.
STATUS
This problem has been corrected in Visual Studio 97 Service Pack 1.
For additional information about the Visual Studio 97 Service Pack 1,
please see the following article in the Microsoft Knowledge Base:
170365
INFO: Visual Studio 97 Service Packs - What, Where, and Why
| Modification Type: | Major | Last Reviewed: | 12/10/2003 |
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| Keywords: | kbBug kbfix kbNoUpdate kbVC500SP1fix KB169484 |
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