奇怪问题，请帮我看看

Question

我从CTreeCtrl类派生出CMytree,由这个派生类创建的对象在CDialog中一切正常，把CDialog改为CDialogBar之后，为什么接收不到TVN_ENDLABELEDIT消息？奇怪的是，从网上下载的例子，代码和我的基本一致，也是在CDialogBar上建的Tree，但这个例子确可以正常响应TVN_ENDLABELEDIT

Answer 1

网上下载的例子（其中CTree是我加的）：
/////////////////////////////////////////////////////////////////////////////
// CIEBar dialogCIEBar::CIEBar(CWnd* pParent /*=NULL*/)
: CDialogBar()
{

}void CIEBar::DoDataExchange(CDataExchange* pDX)
{
CDialogBar::DoDataExchange(pDX);
//{{AFX_DATA_MAP(CIEBar)
// NOTE: the ClassWizard will add DDX and DDV calls here
//}}AFX_DATA_MAP
}
BEGIN_MESSAGE_MAP(CIEBar, CDialogBar)
//{{AFX_MSG_MAP(CIEBar) //}}AFX_MSG_MAP
END_MESSAGE_MAP()
BOOL CIEBar::InitIEBar()
{
// create the tree control
pTreeCtrl = new CTree();//CTreeCtrl();
ASSERT(pTreeCtrl);
if(!pTreeCtrl->Create(WS_CHILD | WS_VISIBLE | TVS_EDITLABELS , CRect(0,0,0,0), this, 101))
{
TRACE0("Failed to create tree control!");
return FALSE;
}    // create the tool tip
    if(!m_TipCtrl.Create(this))
return FALSE;

return TRUE;
}BOOL CIEBar::PreTranslateMessage(MSG* pMsg) 
{
    //m_TipCtrl.RelayEvent(pMsg);
    return CWnd::PreTranslateMessage(pMsg);
}CTreeCtrl* CIEBar::GetTreeCtrl()
{
if(pTreeCtrl)
return pTreeCtrl;
else
return NULL;
}/////////////////////////////////////////////////////////////////////////////
// CTreeCTree::CTree()
{
}CTree::~CTree()
{
}
BEGIN_MESSAGE_MAP(CTree, CTreeCtrl)
//{{AFX_MSG_MAP(CTree)
ON_NOTIFY_REFLECT(TVN_ENDLABELEDIT, OnEndlabeledit)
//}}AFX_MSG_MAP
END_MESSAGE_MAP()void CTree::OnEndlabeledit(NMHDR* pNMHDR, LRESULT* pResult) 
{
TV_DISPINFO* pTVDispInfo = (TV_DISPINFO*)pNMHDR;
         if(pTVDispInfo->item.pszText!=0)
         {
   SetItemText(pTVDispInfo->item.hItem,pTVDispInfo->item.pszText);
            *pResult = TRUE;
         }
         else
            *pResult = FALSE;}/////////////////////////////////////////////////////////
//CMainFrameint CMainFrame::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
if (CFrameWnd::OnCreate(lpCreateStruct) == -1)
return -1;

if (!m_wndToolBar.CreateEx(this, TBSTYLE_FLAT, WS_CHILD | WS_VISIBLE | CBRS_TOP
| CBRS_GRIPPER | CBRS_TOOLTIPS | CBRS_FLYBY | CBRS_SIZE_DYNAMIC) ||
!m_wndToolBar.LoadToolBar(IDR_MAINFRAME))
{
TRACE0("Failed to create toolbar\n");
return -1;      // fail to create
} if (!m_wndStatusBar.Create(this) ||
!m_wndStatusBar.SetIndicators(indicators,
  sizeof(indicators)/sizeof(UINT)))
{
TRACE0("Failed to create status bar\n");
return -1;      // fail to create
} // TODO: Delete these three lines if you don't want the toolbar to
//  be dockable
m_wndToolBar.EnableDocking(CBRS_ALIGN_ANY);
EnableDocking(CBRS_ALIGN_ANY);
DockControlBar(&m_wndToolBar); if(!m_IEBar.Create(this, IDD_IEBAR, CBRS_LEFT, 100) || !m_IEBar.InitIEBar())
return -1;
CTreeCtrl* pTreeCtrl = m_IEBar.GetTreeCtrl();
ASSERT(pTreeCtrl);
// modify tree styles
pTreeCtrl->ModifyStyle(NULL, 
TVS_HASLINES | TVS_LINESATROOT | TVS_HASBUTTONS);
HTREEITEM t_hRoot = pTreeCtrl->InsertItem("root");
for(int i=0; i<40; i++)
{
CString t_ItemStr;
t_ItemStr.Format("node %d", i+1);
pTreeCtrl->InsertItem(t_ItemStr, t_hRoot);
} m_IEBar.EnableDocking(CBRS_ORIENT_HORZ);
DockControlBar(&m_IEBar);
return 0;
}我自己的：
/////////////////////////////////////////////////////////////////////////////
// CTreeDlg dialog
CTreeDlg::CTreeDlg(CWnd* pParent /*=NULL*/)
: CDialogBar()
{
//{{AFX_DATA_INIT(CTreeDlg)
// NOTE: the ClassWizard will add member initialization here
//}}AFX_DATA_INIT
}
void CTreeDlg::DoDataExchange(CDataExchange* pDX)
{
CDialogBar::DoDataExchange(pDX);
//{{AFX_DATA_MAP(CTreeDlg)
// NOTE: the ClassWizard will add DDX and DDV calls here
//}}AFX_DATA_MAP
}
BEGIN_MESSAGE_MAP(CTreeDlg, CDialogBar)
//{{AFX_MSG_MAP(CTreeDlg)
ON_WM_CREATE()
//}}AFX_MSG_MAP
END_MESSAGE_MAP()/////////////////////////////////////////////////////////////////////////////
// CTreeDlg message handlersint CTreeDlg::OnCreate(LPCREATESTRUCT lpCreateStruct) 
{
if (CDialogBar::OnCreate(lpCreateStruct) == -1)
return -1;
m_tree=new CMyTree();
m_tree->Create(WS_CHILD | WS_VISIBLE | TVS_EDITLABELS,CRect(0,0,200,400),this,101); m_tree->InsertItem("AAAAA");
return 0;
}BOOL CTreeDlg::PreTranslateMessage(MSG* pMsg) 
{
// TODO: Add your specialized code here and/or call the base class

return CWnd::PreTranslateMessage(pMsg);
}
/////////////////////////////////////////////////////////////////////////////
// CMyTreeCMyTree::CMyTree()
{
}CMyTree::~CMyTree()
{
}
BEGIN_MESSAGE_MAP(CMyTree, CTreeCtrl)
//{{AFX_MSG_MAP(CMyTree)
ON_NOTIFY_REFLECT(TVN_ENDLABELEDIT, OnEndlabeledit)
//}}AFX_MSG_MAP
END_MESSAGE_MAP()/////////////////////////////////////////////////////////////////////////////
// CMyTree message handlersvoid CMyTree::OnEndlabeledit(NMHDR* pNMHDR, LRESULT* pResult) 
{
TV_DISPINFO* pTVDispInfo = (TV_DISPINFO*)pNMHDR;
// TODO: Add your control notification handler code here
if(pTVDispInfo->item.pszText!=0)
         {
  this->SetItemText(pTVDispInfo->item.hItem,pTVDispInfo->item.pszText);
  *pResult = TRUE;
         }
         else
            *pResult = FALSE;
}
///////////////////////////////////////////////////////////////////
//CMainFrame
int CMainFrame::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
if (CMDIFrameWnd::OnCreate(lpCreateStruct) == -1)
return -1;

if (!m_wndToolBar.CreateEx(this, TBSTYLE_FLAT, WS_CHILD | WS_VISIBLE | CBRS_TOP
| CBRS_GRIPPER | CBRS_TOOLTIPS | CBRS_FLYBY | CBRS_SIZE_DYNAMIC) ||
!m_wndToolBar.LoadToolBar(IDR_MAINFRAME))
{
TRACE0("Failed to create toolbar\n");
return -1;      // fail to create
} if (!m_wndStatusBar.Create(this) ||
!m_wndStatusBar.SetIndicators(indicators,
  sizeof(indicators)/sizeof(UINT)))
{
TRACE0("Failed to create status bar\n");
return -1;      // fail to create
} // TODO: Delete these three lines if you don't want the toolbar to
//  be dockable
m_wndToolBar.EnableDocking(CBRS_ALIGN_ANY);
EnableDocking(CBRS_ALIGN_ANY);
DockControlBar(&m_wndToolBar); if(!m_treedlg.Create(this, IDD_TREEDLG, CBRS_LEFT, 100))
return -1;
CTreeCtrl *pTreeCtrl=m_treedlg.m_tree;
pTreeCtrl->ModifyStyle(NULL, 
TVS_HASLINES | TVS_LINESATROOT | TVS_HASBUTTONS);
HTREEITEM t_hRoot = pTreeCtrl->InsertItem("root");
for(int i=0; i<40; i++)
{
CString t_ItemStr;
t_ItemStr.Format("node %d", i+1);
pTreeCtrl->InsertItem(t_ItemStr, t_hRoot);
} m_treedlg.EnableDocking(CBRS_ORIENT_HORZ);
DockControlBar(&m_treedlg);
//m_treedlg.EnableDocking(CBRS_ALIGN_LEFT);
//DockControlBar(&m_treedlg); return 0;
}