首先保留 ID 为 IDR_MAINFRAME 的菜单资源。跟着删除菜单MDI子窗口的菜单资源，其ID为 (IDR_xxxTYPE) 的类型. 这样做的原因是避免资源泄漏, (哪儿泄漏，我还没有去查，MSDN上是这样的描述) ,在MDI的窗口中，打开子窗口的时候，会发生菜单切换，这些是MFC的代码自动实现的，所以我们现在就是把这些切换菜单的代码去除。

-First, keep the menu resource ID is IDR_MAINFRAME. MDI child window to delete the menu along with a menu resource with the ID (IDR_xxxTYPE) the type of reasons for doing so is to avoid resource leaks, (where the leak, I did not go check, MSDN is this descr iption), the MDI window , open the child window when the menu switching will occur, these are the MFC code automatically, so we are now is to switch the menu code to remove them.