I need to get the scaling factor for each monitor in a multi-monitor setup on Windows 10.  As far as I can find no one has posted anything like that here. I think this is probably what I need: https://msdn.microsoft.com/en-us/library/windows/desktop/dn280510(v=vs.85).aspx I'm just not a windows programmer and I haven't quite figured out how to use DLLCall to get the info from that function. Any pointers or help?