FYI I am using an ARTEC mouse. It works with XyDOS run from Windoz 3.1 if AMOUSE.COM is run just before editor.exe. I wrote an XY4.PIF which runs my XyWrite batch file rather than editor.exe directly. The batch file changes directories, loads AMOUSE, runs XyWrite and then unloads AMOUSE and changes directories again when exiting from XyWrite. Seems to work okay... Myron