[转载]VC?子窗口全屏显示

//三个成员变量
//m_bFullSceen
//CWnd* m_pWndSave;
//WINDOWPLACEMENT m_wpmSave
if(m_bFullSceen)
{
    m_pWndSave->ShowWindow(SW_SHOW);
    SetParent(m_pWndSave);
    ModifyStyle(WS_POPUP,WS_CHILD);
    SetWindowPlacement(&m_wpmSave);
}
else
{
    int cx = ::GetSystemMetrics(SM_CXSCREEN);
    int cy = ::GetSystemMetrics(SM_CYSCREEN);

    GetWindowPlacement(&m_wpmSave);
    ModifyStyle(WS_CHILD,WS_POPUP);
    m_pWndSave = SetParent(NULL);
    m_pWndSave->ShowWindow(SW_HIDE);
    MoveWindow(0, 0, cx, cy);
}