StrStrIW function (shlwapi.h)

Article
11/20/2024

Finds the first occurrence of a substring within a string. The comparison is not case-sensitive.

Syntax

PCWSTR StrStrIW(
  [in] PCWSTR pszFirst,
  [in] PCWSTR pszSrch
);

Parameters

[in] pszFirst

Type: PTSTR

A pointer to the null-terminated string being searched.

[in] pszSrch

Type: PCTSTR

A pointer to the substring to search for.

Return value

Type: PTSTR

Returns the address of the first occurrence of the matching substring if successful, or NULL otherwise.

Remarks

Note

The shlwapi.h header defines StrStrI 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)

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