Compares substrings without regard to case.

#include <string.h>

int strnicmp(const char *string1, const char *string2, size_t count);
int _strnicmp(const char *string1, const char *string2, size_t count);
        
int strncasecmp(const char *string1, const char *string2, size_t count);

#include <wchar.h>

int _wcsnicmp(const wchar_t *string1, const wchar_t *string2, size_t count);

Parameters

string1, string2

Strings to compare.

count

Number of characters compared.

Remarks

Lexicographically compares at most the first count characters of string1 and string2.

strnicmp is a case-insensitive version of strncmp.  _strnicmp and strncasecmp are alternate names for strnicmp.

_wcsnicmp is a wide-character

Return Values

A value indicating the relationship:

Value	Description
< 0	string1 less than string2
= 0	string1 equal to string2
> 0	string1 greater than string2

Requirements