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iscntrl, iswcntrl

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intiscntrl(intc**);**

intiswcntrl(wint_tc**);**

Each of these routines returns true if c is a particular representation of a control character.

Routine Required Header Compatibility
iscntrl <ctype.h> ANSI, Win 95, Win NT
iswcntrl <ctype.h> or <wchar.h> ANSI, Win 95, Win NT

For additional compatibility information, see Compatibility in the Introduction.

Libraries

LIBC.LIB Single thread static library, retail version
LIBCMT.LIB Multithread static library, retail version
MSVCRT.LIB Import library for MSVCRT.DLL, retail version

Return Value

iscntrl returns a non-zero value if c is a control character (0x00 – 0x1F or 0x7F). iswcntrl returns a non-zero value if c is a control wide character. Each of these routines returns 0 if c does not satisfy the test condition.

The result of the test condition for the iscntrl function depends on the LC_CTYPE category setting of the current locale; see setlocale for more information. For iswcntrl, the result of the test condition is independent of locale.

Parameter

c

Integer to test

Generic-Text Routine Mappings

TCHAR.H Routine _UNICODE & _MBCS Not Defined _MBCS Defined _UNICODE Defined
_istcntrl iscntrl iscntrl iswcntrl

Character Classification Routines |  Locale Routines |  is, isw Function Overview