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StrSpnA function (shlwapi.h)

  • Bài viết

Obtains the length of a substring within a string that consists entirely of characters contained in a specified buffer.

Syntax

C++ 
int StrSpnA(
  [in] PCSTR psz,
  [in] PCSTR pszSet
);

Parameters

[in] psz

Type: PCTSTR

A pointer to the null-terminated string that is to be searched.

[in] pszSet

Type: PCTSTR

A pointer to a null-terminated character buffer that contains the set of characters for which to search.

Return value

Type: int

Returns the length, in characters, of the matching string or zero if no match is found.

Remarks

Lưu ý

The shlwapi.h header defines StrSpn as an alias that automatically selects the ANSI or Unicode version of this function based on the definition of the UNICODE preprocessor constant. Mixing usage of the encoding-neutral alias with code that is not encoding-neutral can lead to mismatches that result in compilation or runtime errors. For more information, see Conventions for Function Prototypes.

Requirements

Requirement Value
Minimum supported client Windows 2000 Professional, Windows XP [desktop apps only]
Minimum supported server Windows 2000 Server [desktop apps only]
Target Platform Windows
Header shlwapi.h
Library Shlwapi.lib
DLL Shlwapi.dll (version 4.71 or later)