易语言自绘基类源码例程程序结合易语言扩展界面支持库和多线程支持库，调用API函数和易语言GDI模块实现组件自绘效果。 点评：易语言自绘基类源码是易语言GDI自绘的应用例程。-Easy language drawn the base class source routine program combined with easy language support library expansion interface and multithreading support library,