在中Visual Studio .NET 2003利用DirectShow播放媒体文件(四)[4]

    m_pmediacontrol = null;

    m_pevent = null;

    m_pgraph = null;

    updatedata(false);

    cclientdc dc(getdlgitem(idc_vw_frame));

    dc.setbkcolor(rgb(0,0,0));

    crect rc;

    getdlgitem(idc_vw_frame)->getclientrect(rc);

    clienttoscreen(rc);

    dc.fillrect(rc, cbrush::fromhandle((hbrush)getstockobject(black_brush)));

    invalidate();