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Interface: ISpeechRecoContext Events
The RecognizerStateChange event occurs when the SR engine changes state.
SpeechRecoContext.RecognizerStateChange(
StreamNumber As Long,
StreamPosition As Variant,
NewState As SpeechRecognizerState
)
The following Visual Basic form code demonstrates the use of the RecognizerStateChange event. The application displays the recognition text but also has a button to control the SR engine's state (also called the recognizer). Click this button to toggle the recognizer state between Active and Inactive. The application also beeps after a state change.
To run this code, create a form with the following controls:
Paste this code into the Declarations section of the form.
The Form_Load procedure creates and activates a dictation grammar.
Public WithEvents RC As SpSharedRecoContext
Public myGrammar As ISpeechRecoGrammar
Private Sub Command1_Click()
If RC.Recognizer.State = SRSActive Then
RC.Recognizer.State = SRSInactive
Command1.Caption = "SRSInactive"
Else
RC.Recognizer.State = SRSActive
Command1.Caption = "SRSActive"
End If
End Sub
Private Sub Form_Load()
Set RC = New SpSharedRecoContext
Set myGrammar = RC.CreateGrammar
myGrammar.DictationSetState SGDSActive
Command1.Caption = "SRSActive"
End Sub
Private Sub RC_Recognition(ByVal StreamNumber As Long, ByVal StreamPosition As Variant, ByVal RecognitionType As SpeechLib.SpeechRecognitionType, ByVal Result As SpeechLib.ISpeechRecoResult)
Label1.Caption = Result.PhraseInfo.GetText
End Sub
Private Sub RC_RecognizerStateChange(ByVal StreamNumber As Long, ByVal StreamPosition As Variant, ByVal NewState As SpeechLib.SpeechRecognizerState)
Beep
End Sub
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