製作一個客戶端，選擇duilib+cef+mfc為客戶端介面。父視窗為一個對話方塊，子視窗為duilib的視窗（Mainframe)。當主介面把mfc的對話方塊蓋住時，發現視窗移動不了（無標題視窗）。為了移動主視窗，記錄的解決方法：

• 第一個解決方法（失敗）

...
    if (uMsg == WM_LBUTTONUP)  
    {  
        POINT point = { GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam) };  
        ::ReleaseCapture();  
        ::SendMessage(::GetParent(this->GetHWND()),WM_SYSCOMMAND,SC_DRAGMOVE,0
 
); 
        return 0;
    }
...

這段程式碼實現了點選視窗任意位置，視窗移動的目的，但是視窗的所有訊息都被丟棄了(return 0)。不能採用這個方法。需要監控滑鼠移動+滑鼠點選的事件。
* 第二個方法（ok）

if (uMsg == WM_MOUSEMOVE)
    {  
        if (::GetAsyncKeyState(VK_LBUTTON) != 0 && m_bStartMove)  
        {   
            POINT pt = { GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam) };  
            int
 
 dx = pt.x - m_StartPt.x;  
            int dy = pt.y - m_StartPt.y;  
            RECT curRect;  
            ::GetWindowRect(m_hWnd, &curRect);  

            int cx = curRect.left + dx;  
            int cy = curRect.top + dy;  

            int  w = curRect.right - curRect.left;  
            int
 
  h = curRect.bottom - curRect.top;  

            SetWindowPos(::GetParent(this->GetHWND()), NULL, cx, cy, w, h, SWP_NOSIZE | SWP_NOZORDER | SWP_NOACTIVATE);  
        }  

    }
    else if (uMsg == WM_LBUTTONDOWN)
    {  
        POINT pt = { GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam) };  
        m_bStartMove = TRUE;  
        m_StartPt = pt;  
    }
    else if (uMsg == WM_LBUTTONUP)  
    {  
        m_bStartMove = FALSE;  
    }  

不需要任何返回。完整程式碼如下：

LRESULT MainFrame::HandleMessage(UINT uMsg, WPARAM wParam, LPARAM lParam)
{
    LRESULT lRes = 0; 
    if (uMsg == WM_MOUSEMOVE)
    {  
        if (::GetAsyncKeyState(VK_LBUTTON) != 0 && m_bStartMove)  
        {   
            POINT pt = { GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam) };  
            int dx = pt.x - m_StartPt.x;  
            int dy = pt.y - m_StartPt.y;  
            RECT curRect;  
            ::GetWindowRect(m_hWnd, &curRect);  

            int cx = curRect.left + dx;  
            int cy = curRect.top + dy;  

            int  w = curRect.right - curRect.left;  
            int  h = curRect.bottom - curRect.top;  

            SetWindowPos(::GetParent(this->GetHWND()), NULL, cx, cy, w, h, SWP_NOSIZE | SWP_NOZORDER | SWP_NOACTIVATE);  
        }  

    }
    else if (uMsg == WM_LBUTTONDOWN)
    {  
        POINT pt = { GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam) };  
        m_bStartMove = TRUE;  
        m_StartPt = pt;  
    }
    else if (uMsg == WM_LBUTTONUP)  
    {  
        m_bStartMove = FALSE;  
    }  
    if( uMsg == WM_CREATE ) 
    {  
        CPaintManagerUI::SetInstance(AfxGetInstanceHandle());//載入XML的時候，需要使用該控制代碼去定位EXE的路徑，才能載入XML的路徑
        CPaintManagerUI::SetResourcePath(CPaintManagerUI::GetInstancePath() + _T("skin"));//定點陣圖片等資源的位置

        m_pm.Init(m_hWnd);  
        CDialogBuilder builder;  
        CControlUI *pRoot = builder.Create(_T("ui.xml"), (UINT)0, NULL, &m_pm); //載入的XML檔案的名稱
        ASSERT(pRoot && "Failed to parse XML");  
        m_pm.AttachDialog(pRoot);  
        m_pm.AddNotifier(this);  

        return 0;  
    }  
    else if( uMsg == WM_DESTROY ) 
    {  
        ::PostQuitMessage(0);  
    }  

    if( m_pm.MessageHandler(uMsg, wParam, lParam, lRes) ) return lRes;  
    return CWindowWnd::HandleMessage(uMsg, wParam, lParam);

}

大功告成!