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The Window Cloak State Change PDU (section 2.2.2.12.1) SHOULD be sent by the client when a RAIL window is cloaked or uncloaked on the client (for example, in the case of a virtual desktop feature, when the user switches desktops). A cloaked window MUST be present on the client, but MUST be invisible to the user and MUST NOT receive mouse, pen, or touch input. This PDU ensures that cloaked state is synchronized between client and server.
The PDU is initialized as specified in section 2.2.2.12.1. The WindowId field SHOULD be initialized to the ID of an existing window on the server that is associated with the local RAIL window. The RAIL client SHOULD create this association during processing of the Window Information Order for new windows, as specified in section 2.2.1.3.1.2.1.