StrIsIntlEqualA function (shlwapi.h)

Compares a specified number of characters from the beginning of two strings to determine if they are equal.


BOOL StrIsIntlEqualA(
       BOOL  fCaseSens,
  [in] PCSTR pszString1,
  [in] PCSTR pszString2,
       int   nChar



Type: BOOL

The case sensitivity of the comparison. If this value is nonzero, the comparison is case-sensitive. If this value is zero, the comparison is not case-sensitive.

[in] pszString1


A pointer to the first null-terminated string to be compared.

[in] pszString2


A pointer to the second null-terminated string to be compared.


Type: int

The number of characters from the beginning of each string to be compared.

Return value

Type: BOOL

TRUE if the first nChar characters from the two strings are equal; otherwise, FALSE.


You can set case sensitivity with the StrIntlEqN and StrIntlEqNI macros. StrIntlEqN performs a case-sensitive comparison, and StrIntlEqNI performs a case-insensitive comparison.

The syntax of the two macros is:

#define StrIntlEqN(s1, s2, nChar) StrIsIntlEqual(TRUE, s1, s2, nChar)
#define StrIntlEqNI(s1, s2, nChar) StrIsIntlEqual(FALSE, s1, s2, nChar)


The shlwapi.h header defines StrIsIntlEqual as an alias which 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 not encoding-neutral can lead to mismatches that result in compilation or runtime errors. For more information, see Conventions for Function Prototypes.


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)