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Assembly: Microsoft.Office.Interop.UccApi (in microsoft.office.interop.uccapi.dll)
An application can use this interface to obtain the existing communication channel between a pair of participants in a session to exchange custom information. The information is transmitted as a SIP (typically INFO) message and represented by an IUccSignalingMessage instance.
Win32 COM/C++ Syntax
interface IUccSignalingChannel : IUnknown