3.2.5.2.3 Handling Redirection Surface and Logical Surface Association Management Order
When the client receives a TS_COMPDESK_REDIRSURF_ASSOC_LSURFACE message, the surface manager proxy processes the message as follows:
If the fAssociate value is 0x1, the surface manager proxy creates an association between the proxy structure for the logical surface and redirection surface. The surface manager proxy and the compose desktop mediator identify the logical surface and redirection surface by the unique handles identified by the hLSurface and hSurf values in the message.
If the fAssociate value is 0x0, the surface manager proxy destroys the association between the proxy structure for the logical surface and redirection surface. The association between a logical surface and a redirection surface SHOULD be unique at any given time. The association SHOULD be destroyed before a logical surface or a redirection surface proxy is destroyed.