I use MMF mostly for Screen Savers. So I always set the Frame to Grab Desktop at Start and Resize Screen Size at Start, and the Application window to Resize Display to Fill Window Size with No Heading.
In MMF 1.5 I use to test the position of an Active Object inside the frame to bounce it, and it worked fine by bouncing at the screen edges.
I just received MMF 2 today and tried to do the same, but my Active Object bounces at the Virtual Height and Virtual Width edges. How can I change those limits AT RUN TIME to the actual screen size. Don't want to set it to a specific size because the screen saver needs to support any screen resolution.