Obtaining Unified Communications Client API Interface Pointers

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There are three ways by which a Win32/C++ application can obtain a COM interface pointer before calling its members. These involve calling a co-creatable co-class, calling QueryInterface of the IUnknown interface, or using a factory object or method.

In This Section

• Obtain an Interface Pointer Through a Co-creatable Co-class
  Describes the C++ programming patterns of obtaining the default interface pointer from a co-creatable co-class using CoCreateInstance, a function exposed by the COM library.

• Call QueryInterface on an Existing Interface Pointer
  Describes the C++ programming patterns of navigating to an interface pointer from an existing interface pointer.

• Use a Factory Object to Obtain an Interface Pointer
  Describes the C++ programming patterns of obtaining an interface pointer using the factory object or method exposed by Unified Communications Client API.

See Also

Concepts

Getting Started Using Unified Communications Client API in an MFC Application
Catching Unified Communications Client API Events Using ATL Templates
Reading and Setting Unified Communications Client API Interface Properties