Dear Peter Williams,
you wrote:
I find that (under Win32) with the Gr_default_graphics, I can get GrMouseWarp to position itself correctly by adding 50 pixels to each of the x & y coordinates. However, I am sure that a new universal constant of nature has not been discovered. Something is not right...
IMO that "constant" is the upper left corner of the GRX window on the desktop.
See my previous email to this list for my idea how to fix this bug.
Hope this helps,
Peter