A CorelDRAW question???

Is there a way to change the default value from mm to inches in
CorelDraw 8 or 10?

I'm getting a problem:
I set the page to be in inches then I make a draw and save it, then I
export it to ArtCAM and get a G Code but this G code is in mm.

I think this is because the default value in CorelDRAW is in mm.

Regards
Raul Lara