delphi6里面的speedbutton控件的一个子类，把按钮的形状改为椭圆形，这只是一个简单的示例，需要用的话还要在此基础上做些修改，算是提供一个基本的思路。-the delphi6 inside a speedbutton control subclass to change the shape of the button to the oval, this is just a simple example, the need to use the words but also to be