&pos, am_seeking_nopositioning);
m_pgraph->queryinterface(iid_ivideowindow, (void **)&pvidwin);
pvidwin->put_visible(oafalse);
m_isplaying = false;
getdlgitem(idc_play_button)->enablewindow(true);
getdlgitem(idc_pause_button)->enablewindow(false);
pvidwin->release();
long levcode;