Tests a wide-character code in the current locale to determine if it is visible printable code (the space character is excluded).
#include <wctype.h>
int iswgraph (
wint_t wc);
(IN) Specifies the wide-character code to test.
Returns a nonzero value when the wc argument is a printable code (except for the space code). Otherwise, it returns zero.
The iswgraph function is similar to iswprint, except that the space code is not included in the code set that is being tested.