继承CButton实现自绘的按钮控件，继承CButton实现自绘的按钮控件-Inherited to CButton achieve self-drawn button controls inheritance to the CButton achieve self-painted button control

按钮窗口（控件）在MFC中使用CButton表示，CButton包含了三种样式的按钮，Push Button，Check Box，Radio Box。所以在利用CButton对象生成按钮窗口时需要指明按钮的风格。-Button window (controls) in MFC CButton, The CButton includes three styles of button, Push the Button, Check Box, Radio Box. So you need to spe