Events for Visual Basic 6 COM interoperability > OnWaveformAnalyzerSelection event

Remarks

Occurs when a portion of the waveform on the Waveform Analyzer's display has been selected/deselected through a mouse operation or through a call to the WaveformAnalyzer.SetSelection method.

This event replaces the usage of the CallbackWaveformAnalyzerSelection delegate and is only intended for usage with applications developed using Visual Basic 6 (which results unreliable when dealing with delegates and callbacks) and, in order to be enabled, requires a call to the COMEventEnable method with the nEventType parameter set to EVENT_TYPE_REC_WAVE_SEL_CHANGED.

For details about the use of the Waveform Analyzer refer to the How to use the Waveform Analyzer section.

For further details about methods of the Waveform Analyzer refer to the WaveformAnalyzer class section.

Syntax

[Visual Basic 6]

Private Sub RecorderApi_OnWaveformAnalyzerSelection ( _

ByVal bSelectionAvailable as Boolean, _

ByVal nBeginPosInMs as Long, _

ByVal nEndPosInMs as Long _

)

where "RecorderApi" is declared in Visual Basic 6 code as:

Dim WithEvents RecorderApi As AudioSoundRecorderApi.AudioSoundRecorderApiObj

Event Data

Parameters

Description

bSelectionAvailable

Flag for selection availability.

Supported values are the following:

Value	Meaning
false	No selection is currently available. In this case values passed through nBeginPosInMs and nEndPosInMs parameters must be ignored.
true	A selection is currently available and the start and end positions are inside nBeginPosInMs and nEndPosInMs parameters.

nBeginPosInMs

The selection's start position, expressed in milliseconds

nEndPosInMs

The selection's end position, expressed in milliseconds