Is 8-bit transparency for pngs unsupported for the ImageButton control or is this a limitation of my Dell Axim X3? I think this model only supports 256 colors.
When running the application on a desktop 8-bit transparency works fine.
The .Net CF (the underlying core of Basic4ppc) doesn't support transparent png images.
You could use transparency by setting the ImageButton.Transparent to true.
The color of the left up corner will be the transparent color.