Microsoft KB Archive/140452

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BUG: LoadString Returns Wrong Number of Chars for DBCS Strings

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Q140452

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The information in this article applies to:


 * Microsoft Win32 Application Programming Interface (API), included with:
 * Microsoft Windows 95
 * Microsoft Win32 Software Development Kit (SDK), used with:
 * Microsoft Windows 95

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SYMPTOMS
Under the Japanese, Chinese, and Korean versions of Windows 95, the LoadString API returns an incorrect number of single-byte characters when loading a string that meets both of the following conditions:


 * The string contains at least one DBCS character.
 * The string resource contains more than cchBuffer bytes.

CAUSE
The LoadString API returns the number of single-byte characters into the buffer. However, when it loads a DBCS string that is longer than the given maximum size, LoadString returns an incorrect value. LoadString loads cchBuffer characters and returns the length in bytes. LoadString should load cchBuffer bytes, not characters. The return value will be equal to or greater than cchBuffer. The resulting string copied into the buffer is not properly null terminated.

In Windows NT (Unicode), the API returns the number of characters. In Windows 95 (ANSI version), the API returns the number of bytes. Likewise, the cchBuffer parameter is characters for Windows NT and bytes for Windows 95.

STATUS
Microsoft has confirmed this to be a bug in the Microsoft products listed at the beginning of this article. This bug has been fixed in Japanese and Korean versions of Windows 95 versions OSR2 and later.

Keywords : kbnokeyword

Issue type : kbbug

Technology : kbAudDeveloper kbWin32sSearch kbWin32API