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EndInkInput Method

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EndInkInput Method

Stops adding ink to the InkRecognizerContext object.

Declaration

[C++]

HRESULT EndInkInput ();

[Microsoft® Visual Basic® 6.0]

Public Sub EndInkInput()

Parameters

This method takes no parameters.

Return Value

HRESULT value Description
S_OK Success.
E_OUTOFMEMORY Cannot allocate memory to complete the operation.
E_FAIL An unspecified error occurred.
E_INK_EXCEPTION An exception occurred inside the method.

Remarks

After you call this method, you cannot add strokes to the context.

This method deals with partial recognition. Partial recognition is the ability of the recognizer to return results even if the application has not called EndInkInput (which signals to the application that all the ink has been entered). Partial recognition occurs only if the recognizer can determine that ink has been entered before a call to EndInkInput, and not all recognizers support this feature. Recognizers that do not support partial recognition do not return any result until EndInkInput is called.

Incremental recognition is the ability of the recognizer to process only a small part of the ink that has been passed to it and return a result. For example, consider that an application contains five lines of ink and uses a recognizer of Latin script. The recognizer can process only one line at a time and return a result. This process is used in the idle loop of the background processing thread.

Example

[Visual Basic 6.0]

This Visual Basic 6.0 example shows a button handler that recognizes the ink in its InkRecognizerContext and displays it in a text box if no errors occur. This sample application began with a standard .exe application and added a text box named Text1 and a control button, Command1, as well as a reference to the Tablet PC Type Library. The results of the recognition appear in the text box.

        Option Explicit
Dim WithEvents theInkCollector As InkCollector
Dim theRecognizerContext As InkRecognizerContext
Dim theRecognitionResult As IInkRecognitionResult
Dim theStrokes As InkStrokes

Private Sub Command1_Click()
    theRecognizerContext.EndInkInput
    Dim theRecognitionStatus As InkRecognitionStatus
    Set theRecognitionResult = theRecognizerContext.Recognize(theRecognitionStatus)
    If InkRecognitionStatus.IRS_NoError = theRecognitionStatus Then
        Text1.Text = theRecognitionResult.TopString
    Else
        'Handle the error conditions here.
        Text1.Text = "Error!"
    End If
End Sub

Private Sub Form_Load()
    'Initialize the InkCollector
    Set theInkCollector = New InkCollector
    theInkCollector.hWnd = Me.hWnd
    theInkCollector.Enabled = True
    'Create new RecognizerContext
    Dim theRecognizers As New InkRecognizers
    Dim theRecognizer As IInkRecognizer
    Set theRecognizer = theRecognizers.GetDefaultRecognizer
    Set theRecognizerContext = theRecognizer.CreateRecognizerContext
    'Initialize the recognizer's strokes
    'and assign them to the RecognizerContext
    Set theStrokes = theInkCollector.Ink.Strokes
    Set theRecognizerContext.Strokes = theStrokes
End Sub

Private Sub theInkCollector_Stroke( _
ByVal Cursor As MSINKAUTLib.IInkCursor, _
ByVal Stroke As MSINKAUTLib.IInkStrokeDisp, _
Cancel As Boolean)
    'When a new stroke is collected, add it to
    'the RecognizerContext's strokes collection
    theStrokes.Add Stroke
End Sub

Applies To