动态添加、插入、删除菜单

在MainFrame类的OnCreate函数的最后（return的前面）添加代码：

//删除菜单

GetMenu()->GetSubMenu(0)->DeleteMenu(0,MF_BYPOSITION);

//动态添加菜单

CMenu menu;

menu.CreateMenu();

GetMenu()->AppendMenu(MF_POPUP,(UINT)menu.m_hMenu,"Test");

GetMenu()->GetSubMenu(4)->AppendMenu(MF_POPUP,(UINT)menu.m_hMenu,"hello");

GetMenu()->GetSubMenu(4)->GetSubMenu(0)->AppendMenu(MF_STRING,(UINT)menu.m_hMenu,"world");

menu.Detach();

//插入菜单

GetMenu()->InsertMenu(2,MF_BYPOSITION,MF_POPUP,"instrtmenu");