Arguments

 

nptr

   A pointer to the character string to be converted to an __int64.
 

endptr

   The address of an object where the function can store a pointer
   to the first unrecognized character encountered in the conversion
   process (that is, the character that follows the last character
   in the string being converted). If endptr is a NULL pointer, the
   address of the first unrecognized character is not retained.
 

base

   The value, 2 through 36, to use as the base for the conversion.