Knowledge Base

BUG: LoadString Returns Wrong Number of Chars for DBCS Strings

Article ID: 140452

Article Last Modified on 7/11/2005


APPLIES TO


This article was previously published under Q140452

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: kbbug KB140452