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Miracast is a wireless display standard that allows users to project their Windows device screen to a Miracast-enabled display. The Miracast standard is based on Wi-Fi Direct technology and uses the Wi-Fi Direct connection to establish a peer-to-peer connection between the source device and the display.
Starting in Windows 10 (WDDM 2.0), the operating system ships with a built-in Miracast stack that can work on any GPU. Driver developers should no longer implement a custom Miracast stack. Microsoft might remove support for custom Miracast stacks in a future version of Windows.
For information about the Microsoft Miracast stack and the requirements of drivers and hardware to support Miracast displays starting in Windows 10, see the following documentation:
Building best-in-class Wireless projection solutions with Windows 10
The relevant WHLK documentation at Device.Graphics.WDDM13.DisplayRender.WirelessDisplay
Before Windows 10, Windows 8.1 (WDDM 1.3) drivers could optionally support Miracast. For more information, see Supporting Miracast in Windows 8.1.