如何动态添加和删除菜单项
........................
\Demo
........................\....\Demo.
cpp,4173,2008-03-05
........................\....\Demo.
dsp,4513,2008-03-05
........................\....\Demo.
dsw,533,2008-03-05
........................\....\Demo.
h,1334,2008-03-05
........................\....\Demo.
plg,1121,2008-06-30
........................\....\Demo.
rc,11895,2008-03-05
........................\....\DemoDoc.
cpp,1702,2008-03-05
........................\....\DemoDoc.
h,1453,2008-03-05
........................\....\DemoView.
cpp,2519,2008-03-05
........................\....\DemoView.
h,1859,2008-03-05
........................\....\MainFrm.
cpp,3877,2008-06-30
........................\....\MainFrm.
h,1593,2008-03-05
........................\....\ReadMe.
txt,4263,2008-03-05
........................\....
\res
........................\....\...\Demo.
rc2,396,2008-03-05
........................\....\resource.
h,828,2008-03-05
........................\....\StdAfx.
cpp,206,2008-03-05
........................\....\StdAfx.
h,1054,2008-03-05
