WTL CComboBox CBN_SELCHANGE消息不响应？

stevenkoh 2013-05-13 05:57:38

今天测试了一下CComboBox控件，但一直测不出来，求教。

要求是CCombox空间中的当前值改变，就触发一个事件让父窗口接管处理（无需再按OK按钮）。我看了下手册使用CBN_SELCHANGE 消息。我简单写了一个测试发现无法响应，不知何故？

编程环境：VC6 WTL7.1

程序就是根据向导生成的范例程序，ATL/WTL AppWizard 程序Dialog Based(√Modal Dialog)
然后加了一个ComboBox控件

程序也非常简单：定义：

class CMainDlg : public CDialogImpl<CMainDlg>

{

public:

	enum { IDD = IDD_MAINDLG };



	BEGIN_MSG_MAP(CMainDlg)

		MESSAGE_HANDLER(WM_INITDIALOG, OnInitDialog)

		COMMAND_ID_HANDLER(ID_APP_ABOUT, OnAppAbout)

		COMMAND_ID_HANDLER(IDOK, OnOK)

		COMMAND_ID_HANDLER(IDCANCEL, OnCancel)

		NOTIFY_HANDLER(IDC_COMBO1, CBN_SELCHANGE, OnComboxChanged) //我添加的

	END_MSG_MAP()



// Handler prototypes (uncomment arguments if needed):

//	LRESULT MessageHandler(UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM /*lParam*/, BOOL& /*bHandled*/)

//	LRESULT CommandHandler(WORD /*wNotifyCode*/, WORD /*wID*/, HWND /*hWndCtl*/, BOOL& /*bHandled*/)

//	LRESULT NotifyHandler(int /*idCtrl*/, LPNMHDR /*pnmh*/, BOOL& /*bHandled*/)



	LRESULT OnInitDialog(UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM /*lParam*/, BOOL& /*bHandled*/);

	LRESULT OnAppAbout(WORD /*wNotifyCode*/, WORD /*wID*/, HWND /*hWndCtl*/, BOOL& /*bHandled*/);

	LRESULT OnOK(WORD /*wNotifyCode*/, WORD wID, HWND /*hWndCtl*/, BOOL& /*bHandled*/);

	LRESULT OnCancel(WORD /*wNotifyCode*/, WORD wID, HWND /*hWndCtl*/, BOOL& /*bHandled*/);

	LRESULT OnComboxChanged(int /*idCtrl*/, LPNMHDR /*pnmh*/, BOOL& /*bHandled*/);



	CComboBox m_combobox;  //我添加的

};

实现：





LRESULT CMainDlg::OnInitDialog(UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM /*lParam*/, BOOL& /*bHandled*/)

{

	// center the dialog on the screen

	CenterWindow();



	// set icons

	HICON hIcon = (HICON)::LoadImage(_Module.GetResourceInstance(), MAKEINTRESOURCE(IDR_MAINFRAME), 

		IMAGE_ICON, ::GetSystemMetrics(SM_CXICON), ::GetSystemMetrics(SM_CYICON), LR_DEFAULTCOLOR);

	SetIcon(hIcon, TRUE);

	HICON hIconSmall = (HICON)::LoadImage(_Module.GetResourceInstance(), MAKEINTRESOURCE(IDR_MAINFRAME), 

		IMAGE_ICON, ::GetSystemMetrics(SM_CXSMICON), ::GetSystemMetrics(SM_CYSMICON), LR_DEFAULTCOLOR);

	SetIcon(hIconSmall, FALSE);





	m_combobox=GetDlgItem(IDC_COMBO1) ;

	//m_combobox.SubclassWindow



	m_combobox.ResetContent();

 

   CString strTemp;	

 

 

    for(int i=1;i<=100;i++)

 

   {

 

       strTemp.Format("%d",i);

 

       m_combobox.AddString(strTemp);

 

   }



	m_combobox.SetCurSel(1);





	return TRUE;

}





LRESULT CMainDlg::OnComboxChanged(int /*idCtrl*/, LPNMHDR /*pnmh*/, BOOL& /*bHandled*/)

{

	MessageBox("Changed");

	return 0;

}