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procedure TPlayer.PanelDblClick(Sender: TObject);
begin
  if player.BorderStyle = bsnone
  then begin
    player.BorderStyle:= bsSizeable;
    Player.Width:=450;
    Player.Height:=400;
  end
  else begin
    player.BorderStyle:= bsnone;
    Player.Top:=0;
    Player.Left:=0;
    Player.Width:=screen.Width;
    Player.Height:=screen.Height;
    panel.Width:= player.Width;
    panel.Height:= player.Height;
  end;
end;