Programming for 320x320 (HiRes) screen.

Hi everyone.

I just started learning C programming for the Palm OS 5.4 (Centro). I'm doing this under Ubuntu Linux using GCC/PRC-Tools/PilRC/Access' Garnet SDK. When I create a form (using PilRC) the Palm OS seems to treat it as 160x160 resolution screen. When I specify a form size of 320x320 it truncates and information past the top/right 160 pixels. I have search around and have had no luck on overcoming this issue.

Can I use a form at 320x320 (to display more info than 160x160) or is it reserved for bitmap images or something special? Also, how would I go about shifting the device/os into high resolution mode? (Some links to coding examples on doing this would be very beneficial.)

Thanks.
Brian