Delphi接口剖析源码,本源码包内包括以下源码：接口的其它用法探索、接口和抽象类的实例、接口和多重继承的实例、Delphi实现接口的实例、模拟对象状态改变后自动恢复。-Including the following source: explore other usage interface, instances of interfaces and abstract classes, interfaces, and multiple inheritance instance, Delphi im