一个完整的插件框架结构演示代码，你可以用它来给自己的程序增加插件功能！（编译时注意要先引用typelib目录里的olelib.tlb，否则会出现找不到引用错误） -a complete plug-frame structure demo code, you can use it to their own procedures to increase plugin function! (Compile-time attention to the first use of typelib oleli