Convert strings to an unsigned long-integer value.  

unsigned long wcstoul(
   const wchar_t *nptr,
   wchar_t **endptr,
   int base 
);

nptr      Null-terminated string to convert.

endptr     Pointer to character that stops scan.

base     Number base to use.

Return Value ---------------------------------------------------------------

wcstoul returns the converted value, if any, or ULONG_MAX on overflow.  wcstoul returns 0 if no conversion can be performed. errno is set to ERANGE if overflow or underflow occurs.Example ---------------------------------------------------------------------------  

CString str = _T("0x44420816");
unsigned long ul = wcstoul(str, 0, 16);
// ul = 0x44420816
str = _T("44420816");
ul = wcstoul(str, 0, 16);
// ul = 0x44420816