CharPrev function

Retrieves a pointer to the preceding character in a string. This function can handle strings consisting of either single- or multi-byte characters.

Syntax


LPTSTR WINAPI CharPrev(
  _In_  LPCTSTR lpszStart,
  _In_  LPCTSTR lpszCurrent
);

Parameters

lpszStart [in]

Type: LPCTSTR

The beginning of the string.

lpszCurrent [in]

Type: LPCTSTR

A character in a null-terminated string.

Return value

Type: LPTSTR

The return value is a pointer to the preceding character in the string, or to the first character in the string if the lpszCurrent parameter equals the lpszStart parameter.

Remarks

When called as an ANSI function, CharPrev uses the system default code-page, whereas CharPrevExA specifies a code-page to use.

This function works with default "user" expectations of characters when dealing with diacritics. For example: A string that contains U+0061 U+030a "LATIN SMALL LETTER A" + COMBINING RING ABOVE" — which looks like "å", will advance two code points, not one. A string that contains U+0061 U+0301 U+0302 U+0303 U+0304 — which looks like "a´^~¯", will advance five code points, not one, and so on.

Requirements

Minimum supported client

Windows 2000 Professional [desktop apps only]

Minimum supported server

Windows 2000 Server [desktop apps only]

Header

Winuser.h (include Windows.h)

Library

User32.lib

DLL

User32.dll

Unicode and ANSI names

CharPrevW (Unicode) and CharPrevA (ANSI)

See also

Reference
CharNext
CharNextExA
CharPrevExA
Conceptual
Strings

 

 

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