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The Phone-Extension component provides a simple message box user interface to allow the user to select the device — the headset or hands-free device, or the cellular phone — that must be used to handle incoming and outgoing calls. Because this component is implemented as a library, you can easily extend the functionality by using the phone-extension interfaces provided by Windows CE.
The following list shows the Phone Extension component functions that are called by the Audio Gateway (AG) service.
- BthAGPhoneExtDeinit
 - BthAGGetLastDialed
 - BthAGGetNameByPhoneNumber
 - BthAGGetSpeedDial
 - BthAGPhoneExtInit
 - BthAGPhoneExtEvent
 - BthAGOverrideCallIn
 - BthAGOverrideCallOut
 - BthAGSetServiceCallback
 
See Also
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