The INTERFACEINFO structure contains information about incoming calls. The structure is defined as follows:
typedef struct tagINTERFACEINFO
{
LPUNKNOWN pUnk;
IID iid;
WORD wMethod;
} INTERFACEINFO, * LPINTERFACEINFO;
Windows NT: Use version 3.1 or later.
Windows: Use Windows 95 or later.
Windows CE: Unsupported.
Header: Declared in objidl.h.
IMessageFilter::HandleIncomingCall