ATL / WTL / STL

#define EN_GOT_RETURN         0x1000<br />
<br />
template <class T><br />
class CEditEnterNotificationT : public CWindowImpl<CEditEnterNotificationT<T> , CEdit><br />
{<br />
public:<br />
    BEGIN_MSG_MAP(CEditEnterNotificationT< T >)<br />
        TRACEMSG("CEditEnterNotification");<br />
        MESSAGE_HANDLER(WM_CHAR, OnChar)<br />
        MESSAGE_HANDLER(WM_KEYDOWN, OnKeyDown)<br />
    END_MSG_MAP()<br />
<br />
    CEditEnterNotificationT(HWND hWnd = NULL){ }<br />
<br />
    CEditEnterNotificationT< T >& operator=(HWND hWnd)<br />
    {<br />
        m_hWnd = hWnd;<br />
        return *this;<br />
    }<br />
<br />
    LRESULT OnChar(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)<br />
    {<br />
        //ignore without a beep<br />
        switch (wParam)<br />
        {<br />
            case '\r': //Carriage return<br />
                ATLTRACE("WM_CHAR - CR\n");<br />
                return 0;<br />
                break;<br />
        }<br />
        return DefWindowProc(uMsg, wParam, lParam);<br />
    }<br />
<br />
    LRESULT OnKeyDown(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)<br />
    {<br />
        switch (wParam)<br />
        {<br />
            case VK_RETURN:<br />
                ATLTRACE("WM_KEYDOWN - CR\n");<br />
                ::PostMessage (m_parent, WM_COMMAND, MAKELONG(EN_GOT_RETURN, this->m_dlgItem), LPARAM(this->m_hWnd));<br />
                bHandled = TRUE;<br />
                return FALSE;<br />
            }<br />
            return DefWindowProc(uMsg, wParam, lParam);<br />
        }<br />
<br />
    BOOL AttachToDlgItem(HWND parent, UINT dlgID)<br />
    {<br />
        m_dlgItem = dlgID;<br />
        m_parent = parent;<br />
        HWND hWnd = ::GetDlgItem(parent,dlgID);<br />
        return SubclassWindow(hWnd);<br />
    }<br />
private:<br />
        UINT m_dlgItem;<br />
        HWND m_parent;<br />
};<br />
<br />
typedef CEditEnterNotificationT<CWindow>	CEditEnterNotification;<br />