Changing the height of an collapsed AdvPanel

I using a AdvPanel for showing some events.
It's height is dynamic and i need to change it in collapsed mode.
But if i set the new height in collapsed mode, the panel will be drawn immediately with this new height.
The collapsed state is ignored.
If i change the new height after uncollapse, the animation (using CollapsSteps and CollapsDelay) is useless.
Any solutions?

You can use the AdvPanel.FullHeight property for this