To test your minidriver, you must copy VMOUSE.VXD and VMOUSE.SYM to your WINDOWS\SYSTEM directory. Next, change the "mouse=" line in the [386Enh] section of SYSTEM.INI from "mouse=*vmouse" to "mouse=vmouse.vxd". Changing the "mouse=" line causes Windows to load the newer version of VMOUSE.VXD you just copied, instead of its built-in version. Finally, add another "device=" line in the [386Enh] section to cause Windows to load your minidriver VxD. For example:
device=mydriver.vxd