给应用程序的主框架增加tab控制条，类似tab页面，对应着每个MDIchild窗口,可设置在顶部或底部显示, 可设置显示Tab 的最少child窗口数.-Give applications to increase the main frame section tab control, similar to tab page MDIchild corresponds to each window can be set at the top or bottom of display can show