public HostFlyoutPanelToolForm(Control owner, FlyoutPanel flyoutPanel, FlyoutPanelOptions options, Control hostControl, FlyoutControl flyoutControl)
: base(owner, flyoutPanel, options)
{
handler.HostControl = hostControl; //CreateHandler方法在基类的构造函数中进行了调用，因此，这个地方的handler已经创建
handler.FlyoutControl = flyoutControl;
}
public HostPopupToolWindowUpDownSlideAnimationProvider(IPopupToolWindowAnimationSupports info, Control hostControl, FlyoutControl flyoutControl)
: base(info)
{
this.hostControl = hostControl;
this.flyoutControl = flyoutControl;
}