Mirror Driver Support in Video Miniport Drivers (Windows 2000 Model)
Mirror driver support for video miniport drivers is provided by Windows 2000 and later, so a miniport driver must not have any special code to attempt such support. See Mirror Drivers for more information about display drivers in mirroring systems.
The requirements for a mirror driver miniport driver are minimal. The only functions which must be implemented are DriverEntry, which is exported by the miniport driver, and the following:
Since there is no physical display device associated with a mirrored surface, all three of the functions shown in the preceding list can be empty implementations that always return success.