_isctype, iswctype, _isctype_l, _iswctype_l
Tests c for the property specified by the desc argument. For each valid value of desc, there is an equivalent wide-character classification routine.
int _isctype( int c, _ctype_t desc ); int _isctype_l( int c, _ctype_t desc, _locale_t locale ); int iswctype( wint_t c, wctype_t desc ); int _iswctype_l( wint_t c, wctype_t desc, _locale_t locale );
_isctype and iswctype return a nonzero value if c has the property specified by desc in the current locale or 0 if it does not. The versions of these functions with the _l suffix are identical except that they use the locale passed in instead of the current locale for their locale-dependent behavior. For more information, see Locale.
_UNICODE and _MBCS not defined
Not applicable. To call the standard C function, use PInvoke. For more information, see Platform Invoke Examples.