The mirror driver code sample illustrates how to implement a mirror driver. In Windows Vista and later, the Desktop Windows Manager (DWM) will be turned off when the mirror driver is loaded. In Windows 2000 and later, the mirror driver's clip region must include the primary display device. A mirror device can set a clip region that exactly matches a particular physical device therefore, it can effectively mirror that device. GDI then sends the mirror device all drawing operations that intersect that driver's clip region. All drawing operations start in this virtual desktop space GDI clips and renders them on the appropriate physical display devices that exist in the virtual desktop.Ī mirror device can specify an arbitrary clip region in the virtual desktop, including one that spans more than one physical display device. GDI implements the virtual desktop as a graphics layer above the physical display driver layer. GDI supports a virtual desktop and provides the ability to replicate a portion of the virtual desktop on a mirror device. The Windows Driver Kit (WDK) through the Windows 7 edition (Version 7600) contains a sample mirror driver which includes component source files that are contained in three directories. See Mirror Driver Support in Video Miniport Drivers (Windows 2000 Model) for more information about miniport drivers in mirroring systems. It is implemented and behaves much like any other display driver however, its paired video miniport driver is minimal in comparison to a typical miniport driver. Mirror driver descriptionĪ mirror driver is a display driver for a virtual device that mirrors the drawing operations of one or more additional physical display devices. However, creating a remote display solution is still possible by building a custom Remote Protocol Provider and an Indirect Display Driver.

Support for GDI remote display drivers has already been removed in Windows 10, version 2004. As of Windows 10, GDI accessibility drivers are no longer recommended for new products and Microsoft will remove support in a future OS version.

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