一、用ClassWizard生成一个新类，名字假设起为CMyButton，基类选为CButton； 二、在新类中用ClassWizard添加函数：PreSubclassWindow()、DrawItem()、OnMouseMove()、OnLButtonDown()、OnLButtonUp()；-one with ClassWizard generate a new category, the names of hypotheses for CMyButton, elected CBu