在中Visual Studio .NET 2003利用DirectShow播放媒体文件(三)[3]

bool cplaywnddlg::destroywindow()

{

    // todo: 在此添加专用代码和/或调用基类

    if(m_pgraph)

       m_pgraph->release();

    if(m_pmediacontrol)

       m_pmediacontrol->release();

    if(m_pevent)

       m_pevent->release();

    if(m_pmediaseeking)

       m_pmediaseeking->release();

    m_pgraph = null;

    m_pmediacontrol = null;

    m_pevent = null;

    m_pmediaseeking = null;

    return cdialog::destroywindow();

}