I aim to use _tcstoi64 to convert a char* buffer to __int64. but compile cannot pass.
error C2065: '_tcstoi64' : undeclared identifier
_tcstoi64 is defined in TCHAR.h and I've already include TCHAR.h
I am using VC++ 6.0 SP6 with PSDK 2003 Feberary with _UNICODE defined.
__int64 iVal = _tcstoi64(szTest, NULL, 16);