The Remote Desktop Protocol: Multiparty Virtual Channel Extension describes the messages that are exchanged between a remote desktop host and the participants with which it is engaging in multiparty application sharing. Examples include communicating the names of the participants that are sharing the session or the list of applications that are currently shared. Additional messages allow participants to negotiate control levels to give participants control of mouse and keyboard input to a shared desktop.
Sections 1.5, 1.8, 1.9, 2, and 3 of this specification are normative. All other sections and examples in this specification are informative.