wsprintf() Buffer Limit in Windows

 Last reviewed: November 2, 1995
Article ID: Q77255
The information in this article applies to:
  • Microsoft Windows Software Development Kit (SDK) for Windows versions 3.1 and 3.0
  • Microsoft Win32 Application Programming Interface (API) included with: 

        - Microsoft Windows NT versions 3.1, 3.5, and 3.51
    - Microsoft Windows 95 version 4.0

The wsprintf(lpOutput, lpFormat [, argument] ...) and wvsprintf() functions format and store a series of characters and values in a buffer specified by the first parameter, lpOutput. This buffer is limited to 1K (1024 bytes); in other words, the largest buffer that wsprintf can use is 1K.

If an application tries to use a buffer larger than 1K, the string will be truncated automatically to a length of 1K.

Additional reference words: 3.00 3.10 3.50 4.00 95
KBCategory: kbgraphic
KBSubcategory: GdiDrw

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Last reviewed: November 2, 1995
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