I have download Office Communicator 2007 SDK.
When I used regsvr32.exe to Register CommunicatorAPI.dll, I got a message that is "CommunicatorAPI.dll was loaded, but the DllRegisterServer entry point was not found. This file can not be registered."
So I do not success to register CommunicatorAPI.dll and can not find the CommunicatorAPI Commponent at the COM Tab of Add Reference Window in Visual Studio 2008.
Please tell me how to solve this problem, thanks.