The problem is, if the device res is diferent than 160dpi, you will end up with a distorted image...
I guess the best you can do is to retrieve the device res, and then calculate the correct dimmentions...
Thanks, i want to have an a4 size layout representation so that I can place my custom elements and know they will just fit as specified on the design when printed, at the respective positions. At least this gives me a clear idea.