说明：  这是一个CTabctl扩展类，测试环境:WindowsXP, VC++ 6.0如果编译不了,检查菜单Project->Setting里面是否选择了静态或者共享MFC类
(This is an extension of CTabctl categories, test environment: WindowsXP, VC++ 6.0 If the compiler can not check the menu Project-> Setting it to choose whether or not the static or shared MFC Class)