Maps a connection point for your OLE control to a specific interface ID.
CONNECTION_PART(theClass, iid, localClass )
Specifies the name of the control class whose connection point this is.
The interface ID of the interface called by the connection point.
Specifies the name of the local class that implements the connection point.
CONNECTION_PART(CMyClass, IID_ISampleSink, SampleConnPt)
implements a connection map, with a connection point, that calls the IID_ISinkInterface interface .