using wcsxfrm to find out length of new collated form

[guru_i]

Im using VS Studio. Net 2005 to find out the transformed length of wide char string based on specific locale.

char* p = setlocale(LC_COLLATE,NULL);//US Locale on my machine.

wchar_t tp[6] = L"Hello";

size_t size = wcsxfrm(NULL, tp, 0);



cout<<"Size "<<size<<endl;

But it seems that I can't pass NULL as destination string since it gives me runtime error in wcsfrm.c file. But same code works on 2003 studio.

Can anyone suggest me what is wrong with it.