VS2008SP1/VS2010 展开所有菜单下的子菜单项(默认是部分菜单折叠显示)

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VS2008SP1/VS2010新建的SDI/MDI窗口默认有些菜单是折叠的，如下图所示：

如果要想展开该菜单项的话，可以修改CMainFrame类的OnCreate函数中的代码，里面有这样一段：

int CMainFrame::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
	if (CMDIFrameWndEx::OnCreate(lpCreateStruct) == -1)
		return -1;
// ... ... 省略代码 ... ...
	// enable menu personalization (most-recently used commands)
	// TODO: define your own basic commands, ensuring that each pulldown menu has at least one basic command.
	/*CList<UINT, UINT> lstBasicCommands;

	lstBasicCommands.AddTail(ID_FILE_NEW);
	lstBasicCommands.AddTail(ID_FILE_OPEN);
	lstBasicCommands.AddTail(ID_FILE_SAVE);
	lstBasicCommands.AddTail(ID_FILE_PRINT);
	lstBasicCommands.AddTail(ID_APP_EXIT);
	lstBasicCommands.AddTail(ID_EDIT_CUT);
	lstBasicCommands.AddTail(ID_EDIT_PASTE);
	lstBasicCommands.AddTail(ID_EDIT_UNDO);
	lstBasicCommands.AddTail(ID_APP_ABOUT);
	lstBasicCommands.AddTail(ID_VIEW_STATUS_BAR);
	lstBasicCommands.AddTail(ID_VIEW_TOOLBAR);
	lstBasicCommands.AddTail(ID_VIEW_APPLOOK_OFF_2003);
	lstBasicCommands.AddTail(ID_VIEW_APPLOOK_VS_2005);
	lstBasicCommands.AddTail(ID_VIEW_APPLOOK_OFF_2007_BLUE);
	lstBasicCommands.AddTail(ID_VIEW_APPLOOK_OFF_2007_SILVER);
	lstBasicCommands.AddTail(ID_VIEW_APPLOOK_OFF_2007_BLACK);
	lstBasicCommands.AddTail(ID_VIEW_APPLOOK_OFF_2007_AQUA);
	lstBasicCommands.AddTail(ID_SORTING_SORTALPHABETIC);
	lstBasicCommands.AddTail(ID_SORTING_SORTBYTYPE);
	lstBasicCommands.AddTail(ID_SORTING_SORTBYACCESS);
	lstBasicCommands.AddTail(ID_SORTING_GROUPBYTYPE);

	CMFCToolBar::SetBasicCommands(lstBasicCommands);*/

	return 0;
}

只要将上面的这段代码注释掉即可。注释掉以后运行该程序，显示效果如下所示：

看下MSDN文档对CMFCToolBar::SetBasicCommands 函数的说明：

// CMFCToolBar::SetBasicCommands 
/*
Sets the list of commands that are always displayed when a user opens a menu. 
*/
static void __stdcall SetBasicCommands(
   CList<UINT,UINT>& lstCommands 
);
/*
Parameters
[in] lstCommands
A reference to a CList object that contains a collection of commands. 

Remarks
A basic command is always displayed when the menu is opened. This method is meaningful when the user chooses to view recently used commands. 

Use the CMFCToolBar::AddBasicCommand method to add a command to the list of basic commands. Use the CMFCToolBar::GetBasicCommands method to retrieve the list of basic commands that is used by your application.
*/

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