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_strupr, _strupr_l, _mbsupr, _mbsupr_l, _wcsupr_l, _wcsupr 

Convert a string to uppercase. These functions are deprecated because more secure versions are available; see _strupr_s, _strupr_s_l, _mbsupr_s, _mbsupr_s_l, _wcsupr_s, _wcsupr_s_l.


char *_strupr(
   char *str 
);
wchar_t *_wcsupr(
   wchar_t *str 
);
unsigned char *_mbsupr(
   unsigned char *str 
);
char *_strupr_l(
   char *str,
   _locale_t locale
);
wchar_t *_wcsupr_l(
   wchar_t *str,
   _locale_t locale
);
unsigned char *_mbsupr_l(
   unsigned char *str,
   _locale_t locale
);
template <size_t size>
char *_strupr(
   char (&str)[size]
); // C++ only
template <size_t size>
wchar_t *_wcsupr(
   wchar_t (&str)[size]
); // C++ only
template <size_t size>
unsigned char *_mbsupr(
   unsigned char (&str)[size]
); // C++ only
template <size_t size>
char *_strupr_l(
   char (&str)[size],
   _locale_t locale
); // C++ only
template <size_t size>
wchar_t *_wcsupr_l(
   wchar_t (&str)[size],
   _locale_t locale
); // C++ only
template <size_t size>
unsigned char *_mbsupr_l(
   unsigned char (&str)[size],
   _locale_t locale
); // C++ only

Parameters

str

String to capitalize.

locale

The locale to use.

Returns a pointer to the altered string. Because the modification is done in place, the pointer returned is the same as the pointer passed as the input argument. No return value is reserved to indicate an error.

The _strupr function converts, in place, each lowercase letter in str to uppercase. The conversion is determined by the LC_CTYPE category setting of the locale. Other characters are not affected. For more information on LC_CTYPE, see setlocale. The versions of these functions without the _l suffix use the current locale; the versions with the _l suffix are identical except that they use the locale passed in instead.

_wcsupr and _mbsupr are wide-character and multibyte-character versions of _strupr. The argument and return value of _wcsupr are wide-character strings; those of _mbsupr are multibyte-character strings. These three functions behave identically otherwise.

If str is a null pointer, the invalid parameter handler is invoked, as described in Parameter Validation . If execution is allowed to continue, these functions return the original string and set errno to EINVAL.

In C++, these functions have template overloads that invoke the newer, secure counterparts of these functions. For more information, see Secure Template Overloads.

Generic-Text Routine Mappings
TCHAR.H routine _UNICODE & _MBCS not defined _MBCS defined _UNICODE defined

_tcsupr

_strupr

_mbsupr

_wcsupr

_tcsupr_l

_strupr_l

_mbsupr_l

_wcsupr_l

Routine Required header Compatibility

_strupr, _strupr_l

<string.h>

Windows 95, Windows 98, Windows 98 Second Edition, Windows Millennium Edition, Windows NT 4.0, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003

_wcsupr, _wcsupr_l

<string.h> or <wchar.h>

Windows 95, Windows 98, Windows 98 Second Edition, Windows Millennium Edition, Windows NT 4.0, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003

_mbsupr, _mbsupr_l

<mbstring.h>

Windows 95, Windows 98, Windows 98 Second Edition, Windows Millennium Edition, Windows NT 4.0, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003

For additional compatibility information, see Compatibility in the Introduction.

See the example for _strlwr.

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