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我想在MainFrame中捕获Workspace bar类上的树控件的通知消息 TVN_SELCHANGED,但是奇怪的是不能工作，而在非BCG的工程中确实可以的。 代码如下： <pre class='brush: csharp'> // WorkspaceBar.cpp : implementation of the CWorkspaceBar class // BEGIN_MESSAGE_MAP(CWorkspaceBar, CBCGSizingControlBar) //{{AFX_MSG_MAP(CWorkspaceBar) ON_WM_CREATE() ON_WM_SIZE() ON_NOTIFY(TVN_SELCHANGED, 1, OnSelectTree) //}}AFX_MSG_MAP END_MESSAGE_MAP() int CWorkspaceBar::OnCreate(LPCREATESTRUCT lpCreateStruct) { .... // Create tabs window: if (!m_wndTabs.Create (CBCGTabWnd::STYLE_3D, rectDummy, this, 1)) { TRACE0("Failed to create workspace tab window "); return -1; // fail to create } m_wndTabs.SetImageList (IDB_WORKSPACE, 16, RGB (255, 0, 255)); // Create tree windows. // TODO: create your own tab windows here: const DWORD dwViewStyle = WS_CHILD | WS_VISIBLE | TVS_HASLINES | TVS_LINESATROOT | TVS_HASBUTTONS; if (!m_wndTree1.Create (dwViewStyle, rectDummy, &m_wndTabs, 2) || !m_wndTree2.Create (dwViewStyle, rectDummy, &m_wndTabs, 3)) { TRACE0("Failed to create workspace view "); return -1; // fail to create } ... } void CWorkspaceBar::OnSelectTree(NMHDR* pNMHDR, LRESULT* pResult) { NM_TREEVIEW* pNMTreeView = (NM_TREEVIEW*)pNMHDR; *pResult = 0; } // WorkspaceBar.h : interface of the CWorkspaceBar class // // Generated message map functions protected: //{{AFX_MSG(CWorkspaceBar) afx_msg int OnCreate(LPCREATESTRUCT lpCreateStruct); afx_msg void OnSize(UINT nType, int cx, int cy); afx_msg void OnSelectTree(NMHDR* pNMHDR, LRESULT* pResult); //}}AFX_MSG DECLARE_MESSAGE_MAP() };</pre>