How to maintain the high quality when exporting to Microsoft Word?

Hi

I would like to export a vector graphic figure to MS Word, but no matter if I insert the *.des file as an object or I export it from CorelDRAW as an *.emf file first ("Export For Office"), then insert it, some curves remain low quality. How can I make it look like as it does in CorelDRAW?

Thank you

aecyd