1、Button控件鼠标事件执行顺序(1) WM_LBUTTONDOWN(2) WM_LBUTTONUP(3) OnBnClickedButton1();2、Picture Control的鼠标事件执行顺序(1) WM_LBUTTONDOWN(2) OnStnClickedStaticSpeak()(3) WM_LBUTTONUP