8/28/2008 This section documents the COM interfaces exposed by the Windows Media Player ActiveX control and the Windows Media Player Mobile ActiveX control.
The accessor methods of the IWMPCore or IWMPPlayer interface are used to retrieve specific interfaces. These interfaces, in turn, may have accessor methods for retrieving further interfaces. Calling QueryInterface on one of these interfaces is only necessary when you retrieve the base version of an interface and want to call a method on a later version of the same interface.
The Windows Media Player control exposes the following interfaces.
Reference
Windows Media Player OCX Control 7.0 Reference