ISpeechVoiceStatus InputSentenceLength Property (SAPI 5.3)
The InputSentenceLength property retrieves the length of the sentence currently being spoken by the text-to-speech (TTS) engine.
The InputSentenceLength property of an ISpeechVoiceStatus object is valid only when its RunningState property is SRSEIsSpeaking.
|Set:||(This property is read-only)|
|Get:||Long = ISpeechVoiceStatus.InputSentenceLength|
- The owning object.
Set: (This property is read-only)
Get: A Long variable returning the sentence length.
The following Visual Basic form code demonstrates the use of the InputSentenceLength and InputSentencePosition properties of an ISpeechVoiceStatus object. To run this code, create a form with the following controls:
- A command button called Command1
- A text box called Text1
- Set the HideSelection property of Text1 to False
Paste this code into the Declarations section of the form.
The Form_Load procedure creates a voice object and places sample sentences in the text box. The Command1_Click procedure speaks the contents of the text box asynchronously and loops until the voice finishes speaking. In this loop, the code uses InputSentencePosition and InputSentenceLength properties to highlight each sentence in the text box as it is spoken by the TTS engine. A RunningState property of SRSEDone indicates that the voice has finished speaking.
Option Explicit Dim V As SpeechLib.SpVoice Private Sub Command1_Click() Dim ii As Integer Dim S As SpeechLib.ISpeechVoiceStatus On Error GoTo EH V.Speak Text1.Text, SVSFlagsAsync 'Speak the user-editable text 'Check status periodically Do For ii = 0 To 5000 DoEvents Next ii Set S = V.Status 'Get status in an ISpeechVoiceStatus object 'Text1.HideSelection must be False for this selection to be seen! Text1.SelStart = S.InputSentencePosition Text1.SelLength = S.InputSentenceLength Loop Until V.Status.RunningState = SRSEDone 'Exit when voice stops Text1.SelLength = 0 EH: If Err.Number Then ShowErrMsg End Sub Private Sub Form_Load() On Error GoTo EH Set V = New SpVoice Text1.Text = "One sentence. Another sentence. Still one more sentence." EH: If Err.Number Then ShowErrMsg End Sub Private Sub ShowErrMsg() ' Declare identifiers: Dim T As String T = "Desc: " & Err.Description & vbNewLine T = T & "Err #: " & Err.Number MsgBox T, vbExclamation, "Run-Time Error" End End Sub