COM中的Varient类型在C++下使用十分麻烦，这个类将一些常用的数据类型进行了包装，简化了常用数据类型和Varient类型的转换-COM in Varient type C++ Very troublesome to use, this category will be a number of commonly used data types have been packing, simplifying the common data types and type conversion V