c - Crash in wcscpy_s -

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i getting crash in wcscpy_s while wcscpy works fine. have following struct 

struct test { ... wchar_t         identity[256 * 2];   ... };

i doing member-by-member copy of 1 struct another. below 1 crashing

wcscpy_s(t2.identity, sizeof(t2.identity) , t1.identity);

while 1 working fine:

wcscpy(t2.identity, t1.identity);

if read wcscpy_s reference see middle argument number of elements, while pass size of array in bytes.

if you're using visual c++ can use e.g. _countof number of elements.


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