Solved the issue: The problem was that you have to call WinSetCoordinateSystem(kCoordinatesNative); before every single graphics call, 'cause it's always being set back to low resolution.
In this case, I forgot to call it again right before creating my offscreen window. So when I told it to create a 320 x 320 x 8 offscreen window it created a 640 x 640 x 8 offscreen window (thinking I was specifying a high density bitmap by means of low density coordinates), which I had misinterpreted as being a 16-bit window until I found out more about it. Once I added in the extra WinSetCoordinateSystem, I got the buffer I needed. I guess this will all be pretty cludgy until the last vestiges of the PalmOS move over to high density support. - Jeff -- For information on using the Palm Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/
