CObject
CMFCToolBarButton
CMFCOutlookBarPaneButton
The default implementation sets the CMFCToolBarButton::m_nStyle data member to nStyle. Override this method if you want to perform additional processing to handle the change in style. See ToolBar Control Styles for a list of valid style flags. 不是CMFCButton,而是CMFCToolBarButton ,而且只有一个 m_bbelowtext 难道只能向下?