Video_Win Video_Win::WStd(Pt2di sz,REAL zoom,Video_Win Soeur,bool SetClikCoord)
{
     Video_Win   W  (Soeur.disp(),Soeur.sop(),Pt2di(50,50),Pt2di(Pt2dr(sz)*zoom));
     return W.chc(Pt2dr(-0.5,-0.5),Pt2dr(zoom,zoom),SetClikCoord);
}