Hi!
I have earlier posted this question: viewtopic.php?f=11&t=18256&hilit=resizing
I am using a splitter, which resizes the elements on left and right, depending on where you move the splitbar.
After posting the above question, I was partially able to solve the problem by calling this line of code, when ever the resizing took place.
CKEDITOR.instances['instanceName'].resize(width,height);