Do not prompt to save when document is closed

Hi all
I've searched all over the internet for the answer to this and i can't find it anywhere, i'm hoping someone here can help.

I have a word document set up that imports data from excel so it can be emailed. How do i set it up so that when a user hits "close" or the "X" it doesn't prompt to save and all changes are discarded.

Do i use AutoClose()? And where do i put the code.

Thanks heaps!!!!!
Waikiki51