Activex template library provides a template base of c + + . the template library realizes some basic com character such as iunknown > iclassfactory in interface . use of atl can write compact code . it also provides visual support Atl是activextemplatelibrary的缩写，它提供了一个基于模板的c + +类库，其模板类实现了一些com的基本特征，如一些基本的com接口iunknown 、 iclassfactory等。
