Tooltips with variable height

[digitalpencil]

Hi,
I'm currently using tooltips in one of my movies to popup various info on rollover. The length of this information however, varies and therefore I would like to create a tooltip that's height is dynamically assigned by the length of the string.
I am currently using the createEmptyMovieClip with lineTo commands controlling the height and width of my tooltip background, and the createTextField object to pass my strings to. This is working fine, but the size is fixed.

How would I go about modifying my code so that the height of the dynamic textfield is assigned by the length of the string passed to it?

My current code is as follows:
_root.tooltip.tiptext.createTextField("tiptext", 2, 2, 100, 60);
_root.tooltip.tiptext.type = "dynamic"
_root.tooltip.tiptext.multiline = true;
_root.tooltip.tiptext.wordwrap = true;

All help/advice is greatly appreciated,
Thanks,
DigiPencil

 

[billwatson]

try adding

_root.tooltip.tiptext.autosize = true;