Tests for an alphabetic wide-character code in the current locale.
#include <wctype.h> int iswctype ( wint_t wc, wctype_t charclass);
(IN) Specifies the wide-character code to test.
(IN) Specifies the character class to test for. See Section 12.3, Wide Character Classes for a list of character class flags.
Returns TRUE if the wc argument is of the specified character class. Otherwise, returns FALSE.