Need help about importing CST design file onto HFSS

Hello fellow members,
I would like to know about the method/procedure for importing CST antenna design file onto HFSS. Is there any procedure for importing it into HFSS.
Regards

CST can export any design in IGES or any popular 3D format to my knowledge..
HFSS will accept these popular formats..

I agree with BigBoss, however notice that you will lose any parameters that you may have added in CST. If you want to have a parametric model, the only way is to draw again the model.