ITToneDetectionEvent::get_CallbackInstance method (tapi3if.h)

The get_CallbackInstance method gets a pointer to the application's callback function that will process the event.

Syntax

HRESULT get_CallbackInstance(
  [out] long *plCallbackInstance
);

Parameters

[out] plCallbackInstance

Pointer to the callback instance returned by the ITTAPI::RegisterCallNotifications method.

Return value

This method can return one of these values.

Return code/value	Description
S_OK	Method succeeded.
E_POINTER	The plCallbackInstance parameter is not a valid pointer.
8	LegacyMediaControl2 Enums

Requirements

Requirement	Value
Target Platform	Windows
Header	tapi3if.h
Library	Uuid.lib
DLL	Tapi3.dll

See also

ITTAPI::RegisterCallNotifications

ITToneDetectionEvent