一个可以实现加法运算的类模块,帮助初学vb的人掌握如何开发部件-Addition operations can be achieved a class module to help people master beginner vb how to develop components

测试插件,演示VB开发插件的使用示例，包括代码以及类模块-Test plug-in, demonstrates the use of VB developers plug example, including the code, and class modules