要想修改CButton类按钮背景颜色和文字颜色，必须利用自绘方法对按钮进行重新绘制。这可以通过定义一个以CButton为基类的新按钮类来实现。-To modify the the CButton class button background color and text color, you must use self-drawn button to be redrawn. This can be done by defining a new base class button class C